IMac late 2009, screen blacks out running Yosemite 10.10.2

My iMac's screen blacks out for no apparent reason, and the computer is still running normally. But I can't see it.
I thought temperatures were to blame, resetted fans with Macs fan control to speeds, where everything is nice and cool, the problem persists.
The screen might black out, for no apparent reason while working, or when idle. Trying to restart manually, it might black out while in the login screen, or even the apple logo. Or it might even restart normally and work for 8 hours. I have been trying to leave login items out, even Macs fan control an iStats, and the problem remains.
If I clear PRAM while rebooting, I might get a new lease of working life, but not persistently.
The problem started around two months AFTER I installed yosemite and with no new programs installed at the time.
Please Help.

And an Etrecheck
Problem description:
iMac screen blacks out in yosemite
EtreCheck version: 2.1.8 (121)
Report generated 1April, 2015 at 15:20:46 GMT+3
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Hardware Information: ℹ️
    iMac (27-inch, Late 2009) (Technical Specifications)
    iMac - model: iMac10,1
    1 3.06 GHz Intel Core 2 Duo CPU: 2-core
    8 GB RAM Upgradeable
        BANK 0/DIMM0
            2 GB DDR3 1067 MHz ok
        BANK 1/DIMM0
            2 GB DDR3 1067 MHz ok
        BANK 0/DIMM1
            2 GB DDR3 1067 MHz ok
        BANK 1/DIMM1
            2 GB DDR3 1067 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
    ATI Radeon HD 4850 - VRAM: 512 MB
        iMac 2560 x 1440
System Software: ℹ️
    OS X 10.10.2 (14C1514) - Time since boot: 1:12:55
Disk Information: ℹ️
    Hitachi HDE721010SLA330 disk0 : (1 TB)
        EFI (disk0s1) <not mounted> : 210 MB
        Macintosh HD (disk0s2) / : 999.21 GB (554.08 GB free)
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
    OPTIARC DVD RW AD-5680H
USB Information: ℹ️
    Logitech USB Receiver
    Apple Inc. Built-in iSight
    Generic USB Storage
    Apple Internal Memory Card Reader
    Microsoft Wired Keyboard 600
    Apple Computer, Inc. IR Receiver
    Apple Inc. BRCM2046 Hub
        Apple Inc. Bluetooth USB Host Controller
Gatekeeper: ℹ️
    Anywhere
Kernel Extensions: ℹ️
        /Library/Application Support/Avast/components/fileshield/unsigned
    [loaded]    com.avast.AvastFileShield (2.1.0 - SDK 10.10) [Click for support]
        /Library/Application Support/Avast/components/proxy/unsigned
    [loaded]    com.avast.PacketForwarder (2.0 - SDK 10.10) [Click for support]
        /Library/Extensions
    [loaded]    com.driver.LogJoystick (2.0 - SDK 10.9) [Click for support]
    [loaded]    com.logitech.driver.LogiGamingMouseFilter (1 - SDK 10.8) [Click for support]
        /Users/[redacted]/Library/Services/ToastIt.service/Contents/MacOS
    [not loaded]    com.roxio.TDIXController (2.0) [Click for support]
Startup Items: ℹ️
    TuxeraNTFSUnmountHelper: Path: /Library/StartupItems/TuxeraNTFSUnmountHelper
    Startup items are obsolete in OS X Yosemite
Launch Agents: ℹ️
    [not loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [running]    com.avast.update-agent.plist [Click for support]
    [loaded]    com.avast.userinit.plist [Click for support]
    [running]    com.bjango.istatmenusagent.plist [Click for support]
    [running]    com.bjango.istatmenusnotifications.plist [Click for support]
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [loaded]    com.avast.init.plist [Click for support]
    [loaded]    com.avast.uninstall.plist [Click for support]
    [loaded]    com.avast.update.plist [Click for support]
    [running]    com.bjango.istatmenusdaemon.plist [Click for support]
    [running]    com.bombich.ccchelper.plist [Click for support]
    [loaded]    com.torch.update.agent.plist [Click for support]
    [loaded]    net.freemacsoft.LiteIcon.LIHelperTool.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [loaded]    com.avast.home.userinit.plist [Click for support]
    [loaded]    com.google.keystone.agent.plist [Click for support]
    [failed]    com.jdibackup.ZipCloud.autostart.plist [Click for support]
    [loaded]    com.jdibackup.ZipCloud.backupstart.plist [Click for support]
    [failed]    com.jdibackup.ZipCloud.notify.plist [Click for support]
User Login Items: ℹ️
    Macs Fan Control    Application (/Applications/Macs Fan Control.app)
    Dropbox    Application (/Applications/Dropbox.app)
    Logitech Gaming Software    Application Hidden (/Applications/Logitech/Logitech Gaming Software.app)
Internet Plug-ins: ℹ️
    FlashPlayer-10.6: Version: 17.0.0.134 - SDK 10.6 [Click for support]
    QuickTime Plugin: Version: 7.7.3
    Flash Player: Version: 17.0.0.134 - SDK 10.6 [Click for support]
    Default Browser: Version: 600 - SDK 10.10
    Unity Web Player: Version: UnityPlayer version 4.6.1f1 - SDK 10.6 [Click for support]
    Silverlight: Version: 5.1.30514.0 - SDK 10.6 [Click for support]
    JavaAppletPlugin: Version: 15.0.0 - SDK 10.10 Check version
User internet Plug-ins: ℹ️
    RealPlayer Plugin: Version: Unknown [Click for support]
    Google Earth Web Plug-in: Version: 7.1 [Click for support]
Safari Extensions: ℹ️
    AllMyTube
    GMail Counter
    SPOI Options
    Ultimate Status Bar
    SuperDrag
    Stop/Reload Button
    AdBlock
    YoutubeWide
    Magic Scroll
    ZoomBySite
    AllPagesZoom
    ClickToFlash
Audio Plug-ins: ℹ️
    DVCPROHDAudio: Version: 1.3.2
3rd Party Preference Panes: ℹ️
    Flash Player [Click for support]
    Perian [Click for support]
    Tuxera NTFS [Click for support]
Time Machine: ℹ️
    Time Machine not configured!
Top Processes by CPU: ℹ️
         9%    mds
         5%    WindowServer
         3%    storedownloadd
         3%    MacsFanControl
         2%    com.avast.proxy
Top Processes by Memory: ℹ️
    438 MB    softwareupdated
    292 MB    Safari
    163 MB    com.avast.daemon
    160 MB    com.apple.WebKit.WebContent
    112 MB    iStatMenusDaemon
Virtual Memory Information: ℹ️
    3.28 GB    Free RAM
    3.84 GB    Active RAM
    624 MB    Inactive RAM
    739 MB    Wired RAM
    2.52 GB    Page-ins
    53 MB    Page-outs
Diagnostics Information: ℹ️
    Apr 1, 2015, 02:05:41 PM    Self test - passed
    Apr 1, 2015, 11:51:03 AM    /Library/Logs/DiagnosticReports/com.apple.AmbientDisplayAgent_2015-04-01-115103 _[redacted].crash
    Mar 31, 2015, 04:43:57 PM    /Library/Logs/DiagnosticReports/ntfs-3g_2015-03-31-164357_[redacted].crash
    Mar 31, 2015, 04:39:52 PM    /Library/Logs/DiagnosticReports/ntfs-3g_2015-03-31-163952_[redacted].crash
    Mar 31, 2015, 12:38:13 PM    /Library/Logs/DiagnosticReports/ntfs-3g_2015-03-31-123813_[redacted].crash
    Mar 31, 2015, 04:16:25 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/garcon_2015-03-31-041625_[reda cted].crash
    Mar 31, 2015, 03:06:27 AM    /Library/Logs/DiagnosticReports/com.apple.AmbientDisplayAgent_2015-03-31-030627 _[redacted].crash

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Triple-click anywhere in the line of text below on this page to select it:
PATH=/usr/bin:/bin:/usr/sbin:/sbin:/usr/libexec;clear;cd;p=(Software Hardware Memory Diagnostics Power FireWire Thunderbolt USB Fonts 51 4 1000 25 5120 KiB/s 1024 85 \\b%% 20480 1 MB/s 25000 ports 'com.autodesk.AutoCad com.evenflow.dropbox com.google.GoogleDrive' DYLD_INSERT_LIBRARIES\ DYLD_LIBRARY_PATH -86 ` route -n get default|awk '/e:/{print $2}' ` 25 N\\/A down up 102400 25600 recvfrom sendto CFBundleIdentifier 25 25 25 1000 MB );N5=${#p[@]};p[N5]=` networksetup -listnetworkserviceorder|awk ' NR>1 { sub(/^$[0-9]+$ /,"");n=$0;getline;} $NF=="'${p[26]}')" { sub(/.$/,"",$NF);print n;exit;} ' `;f=('\n%s: %s\n' '\n%s\n\n%s\n' '\nRAM details\n%s\n' %s\ %s '%s\n-\t%s\n' );S0() { echo ' { q=$NF+0;$NF="";u=$(NF-1);$(NF-1)="";gsub(/^ +| +$/,"");if(q>='${p[$1]}') printf("%s (UID %s) is using %s '${p[$2]}'",$0,u,q);} ';};s=(' /^ *$|CSConfigDot/d;s/^ */ /;s/[-0-9A-Fa-f]{22,}/UUID/g;s/(ochat)\.[^.]+(\..+)/\1\2/;/Shared/!s/\/Users\/[^/]+/~/g ' ' s/^ +//;5p;6p;8p;12p;' ' {sub(/^ +/,"")};NR==6;NR==13&&$2<'${p[10]} ' 1s/://;3,6d;/[my].+:/d;s/^ {4}//;H;${ g;s/\n$//;/s: [^EO]|x([^08]|02[^F]|8[^0])/p;} ' ' 5h;6{ H;g;/P/!p;} ' ' ($1~/^Cy/&&$3>'${p[11]}')||($1~/^Cond/&&$2!~/^N/) ' ' /:$/{ N;/:.+:/d;s/ *://;b0'$'\n'' };/^ *(V.+ [0N]|Man).+ /{ s/ 0x.... //;s/[()]//g;s/(.+: )(.+)/ (\2)/;H;};$b0'$'\n'' d;:0'$'\n'' x;s/\n\n//;/Apple[ ,]|Intel|SMSC/d;s/\n.*//;/\)$/p;' ' s/^.*C/C/;H;${ g;/No th|pms/!p;} ' '/= [^GO]/p' '{$1=""};1' ' /Of/!{ s/^.+is |\.//g;p;} ' ' $0&&!/ / { n++;print;} END { if(n<200) print "com.apple.";} ' ' $3~/[0-9]:[0-9]{2}$/ { gsub(/:[0-9:a-f]{14}/,"");} { print|"tail -n'${p[12]}'";} ' ' NR==2&&$4<='${p[13]}' { print $4;} ' ' END { $2/=256;if($2>='${p[15]}') print int($2) } ' ' NR!=13{next};{sub(/[+-]$/,"",$NF)};'"`S0 21 22`" 'NR!=2{next}'"`S0 37 17`" ' NR!=5||$8!~/[RW]/{next};{ $(NF-1)=$1;$NF=int($NF/10000000);for(i=1;i<=3;i++){$i="";$(NF-1-i)="";};};'"`S0 19 20`" 's:^:/:p' '/\.kext\/(Contents\/)?Info\.plist$/p' 's/^.{52}(.+) <.+/\1/p' ' /Launch[AD].+\.plist$/ { n++;print;} END { if(n<200) print "/System/";} ' '/\.xpc\/(Contents\/)?Info\.plist$/p' ' NR>1&&!/0x|\.[0-9]+$|com\.apple\.launchctl\.(Aqua|Background|System)$/ { print $3;} ' ' /\.(framew|lproj)|\):/d;/plist:|:.+(Mach|scrip)/s/:[^:]+//p ' '/root/p' ' !/\/Contents\/.+\/Contents|Applic|Autom|Frameworks/&&/Lib.+\/Info.plist$/ { n++;print;} END { if(n<1000) print "/System/";} ' '/^\/usr\/lib\/.+dylib$/p' ' /Temp|emac/ { next;} /(etc|Preferences|Launch[AD].+)\// { sub(".(/private)?","");n++;print;} END { if(n<500) print "Launch";} ' ' /\/(Contents\/.+\/Contents|Frameworks)\/|\.wdgt\/.+\.([bw]|plu)/d;p;' 's/\/(Contents\/)?Info.plist$//;p' ' { gsub("^| ","\\|\\|kMDItem'${p[35]}'=");sub("^...."," ") };1 ' p '{print $3"\t"$1}' 's/\'$'\t''.+//p' 's/1/On/p' '/Prox.+: [^0]/p' '$2>'${p[9]}'{$2=$2-1;print}' ' BEGIN { i="'${p[26]}'";M1='${p[16]}';M2='${p[18]}';M3='${p[31]}';M4='${p[32]}';} !/^A/ { next;} /%/ { getline;if($5<M1) a="user "$2"%, system "$4"%";} /disk0/&&$4>M2 { b=$3" ops/s, "$4" blocks/s";} $2==i { if(c) { d=$3+$4+$5+$6;next;};if($4>M3||$6>M4) c=int($4/1024)" in, "int($6/1024)" out";} END { if(a) print "CPU: "a;if(b) print "I/O: "b;if(c) print "Net: "c" (KiB/s)";if(d) print "Net errors: "d" packets/s";} ' ' /r\[0\] /&&$NF!~/^1(0|72\.(1[6-9]|2[0-9]|3[0-1])|92\.168)\./ { print $NF;exit;} ' ' !/^T/ { printf "(static)";exit;} ' '/apsd|OpenD/!s/:.+//p' ' (/k:/&&$3!~/(255\.){3}0/ )||(/v6:/&&$2!~/A/ ) ' ' $1~"lR"&&$2<='${p[25]}';$1~"li"&&$3!~"wpa2";' ' BEGIN { FS=":";} { n=split($3,a,".");sub(/_2[01].+/,"",$3);print $2" "$3" "a[n]" "$1;b=b$1;} END { if(b) print("\n\t* Code injection");} ' ' NR!=4{next} {$NF/=10240} '"`S0 27 14`" ' END { if($3~/[0-9]/)print$3;} ' ' BEGIN { L='${p[36]}';} !/^[[:space:]]*(#.*)?$/ { l++;if(l<=L) f=f"\n "$0;} END { F=FILENAME;if(!F) exit;if(!f) f="\n [N/A]";"file -b "F|getline T;if(T!~/^(AS.+ (En.+ )?text$|POSIX sh.+ text ex)/) F=F" ("T")";printf("\nContents of %s\n%s\n",F,f);if(l>L) printf("\n ...and %s more line(s)\n",l-L);} ' ' /^ +[NP].+ =/h;/^( +D.+[{]|[}])/{ g;s/.+= //p;};' ' /^ +B/{ s/.+= |(-[0-9]+)?\.s.+//g;p;} ' ' END{print NR} ' ' /id: N|te: Y/{i++} END{print i} ' ' / / { print "'"${p[28]}"'";exit;};1;' '/ en/!s/\.//p' ' NR!=13{next};{sub(/[+-M]$/,"",$NF)};'"`S0 39 40`" ' $10~/$L/&&$9!~"localhost" { sub(/.+:/,"",$9);print $1": "$9;} ' '/^ +r/s/.+"(.+)".+/\1/p' 's/(.+\.wdgt)\/(Contents\/)?Info\.plist$/\1/p' 's/^.+\/(.+)\.wdgt$/\1/p' 's/0/Off/p' );c1=(system_profiler pmset\ -g nvram fdesetup find syslog df vm_stat sar ps sudo\ crontab sudo\ iotop top pkgutil PlistBuddy whoami cksum kextstat launchctl sudo\ launchctl crontab 'sudo defaults read' stat lsbom mdfind ' for i in ${p[24]};do ${c1[18]} ${c2[27]} $i;done;' defaults\ read scutil sudo\ dtrace sudo\ profiles sed\ -En awk /S*/*/P*/*/*/C*/*/airport networksetup mdutil sudo\ lsof test );c2=(com.apple.loginwindow\ LoginHook '-c Print /L*/P*/loginw*' '-c Print L*/P*/*loginit*' '-c Print L*/Saf*/*/E*.plist' '~ $TMPDIR.. \( -flags +sappnd,schg,uappnd,uchg -o ! -user $UID -o ! -perm -600 $' '.??* -path .Trash -prune -o -type d -name *.app -print -prune' '-c Print\ :'${p[35]}' 2>&1' '-c Print\ :Label 2>&1' '{/,}L*/{Con,Pref}* -type f ! -size 0 -name *.plist -exec plutil -s {} \;' "-f'%N: %l' Desktop L*/Keyc*" therm sysload boot-args status " -F '\$Time \$Message' -k Sender kernel -k Message Req 'bad |Beac|caug|dead[^bl]|FAIL|fail|GPU |hfs: Ru|inval|jnl:|last value [1-9]|n Cause: -|NVDA$|pagin|proc: t|Roamed|rror|ssert|Thrott|tim(ed? ?|ing )o|WARN' -k Message Rne 'Goog|ksadm|SMC:' -o -k Sender fseventsd -k Message Req 'SL' " '-du -n DEV -n EDEV 1 10' 'acrx -o comm,ruid,%cpu' '-t1 10 1' '-f -pfc /var/db/r*/com.apple.*.{BS,Bas,Es,J,OSXU,Rem,up}*.bom' '{/,}L*/Lo*/Diag* -type f -regex .\*[cgh] ! -name *ag \( -exec grep -lq "^Thread c" {} \; -exec printf \* \; -o -true $ -execdir stat -f:%Sc:%N -t%F {} \;|sort -t: -k2 |tail -n'${p[38]} '-L {/{S*/,},}L*/Lau* -type f' '-L /{S*/,}L*/StartupItems -type f -exec file {} +' '-L /S*/L*/{C*/Sec*A,E}* {/,}L*/{A*d,Ca*/*/Ex,Compon,Ex,In,iTu,Keyb,Mail/B,P*P,Qu*T,Scripti,Sec,Servi,Spo,Widg}* -type f -name Info.plist' '/usr/lib -type f -name *.dylib' `awk "${s[31]}"<<<${p[23]}` "/e*/{auto,{cron,fs}tab,hosts,{[lp],sy}*.conf,pam.d/*,ssh{,d}_config,*.local} {,/usr/local}/etc/periodic/*/* /L*/P*{,/*}/com.a*.{Bo,sec*.ap}*t /S*/L*/Lau*/*t .launchd.conf" list getenv /Library/Preferences/com.apple.alf\ globalstate --proxy '-n get default' -I --dns -getdnsservers\ "${p[N5]}" -getinfo\ "${p[N5]}" -P -m\ / '' -n1 '-R -l1 -n1 -o prt -stats command,uid,prt' '--regexp --only-files --files com.apple.pkg.*|sort|uniq' -kl -l -s\ / '-R -l1 -n1 -o mem -stats command,uid,mem' -i4TCP:0-1023 com.apple.dashboard\ layer-gadgets '-d /L*/Mana*/$USER&&echo On' '-app Safari WebKitDNSPrefetchingEnabled' );N1=${#c2[@]};for j in {0..8};do c2[N1+j]=SP${p[j]}DataType;done;N2=${#c2[@]};for j in 0 1;do c2[N2+j]="-n ' syscall::'${p[33+j]}':return { @out[execname,uid]=sum(arg0) } tick-10sec { trunc(@out,1);exit(0);} '";done;l=(Restricted\ files Hidden\ apps 'Elapsed time (s)' POST Battery Safari\ extensions Bad\ plists 'High file counts' User Heat System\ load boot\ args FileVault Diagnostic\ reports Log 'Free space (MiB)' 'Swap (MiB)' Activity 'CPU per process' Login\ hook 'I/O per process' Mach\ ports kexts Daemons Agents launchd Startup\ items Admin\ access Root\ access Bundles dylibs Apps Font\ issues Inserted\ dylibs Firewall Proxies DNS TCP/IP Wi-Fi Profiles Root\ crontab User\ crontab 'Global login items' 'User login items' Spotlight Memory Listeners Widgets Parental\ Controls Prefetching );N3=${#l[@]};for i in 0 1 2;do l[N3+i]=${p[5+i]};done;N4=${#l[@]};for j in 0 1;do l[N4+j]="Current ${p[29+j]}stream data";done;A0() { id -G|grep -qw 80;v[1]=$?;((v[1]==0))&&sudo true;v[2]=$?;v[3]=`date +%s`;clear >&-;date '+Start time: %T %D%n';};for i in 0 1;do eval ' A'$((1+i))'() { v=` eval "${c1[$1]} ${c2[$2]}"|'${c1[30+i]}' "${s[$3]}" `;[[ "$v" ]];};A'$((3+i))'() { v=` while read i;do [[ "$i" ]]&&eval "${c1[$1]} ${c2[$2]}" \"$i\"|'${c1[30+i]}' "${s[$3]}";done<<<"${v[$4]}" `;[[ "$v" ]];};A'$((5+i))'() { v=` while read i;do '${c1[30+i]}' "${s[$1]}" "$i";done<<<"${v[$2]}" `;[[ "$v" ]];};';done;A7(){ v=$((`date +%s`-v[3]));};B2(){ v[$1]="$v";};for i in 0 1;do eval ' B'$i'() { v=;((v['$((i+1))']==0))||{ v=No;false;};};B'$((3+i))'() { v[$2]=`'${c1[30+i]}' "${s[$3]}"<<<"${v[$1]}"`;} ';done;B5(){ v[$1]="${v[$1]}"$'\n'"${v[$2]}";};B6() { v=` paste -d: <(printf "${v[$1]}") <(printf "${v[$2]}")|awk -F: ' {printf("'"${f[$3]}"'",$1,$2)} ' `;};B7(){ v=`grep -Fv "${v[$1]}"<<<"$v"`;};C0(){ [[ "$v" ]]&&echo "$v";};C1() { [[ "$v" ]]&&printf "${f[$1]}" "${l[$2]}" "$v";};C2() { v=`echo $v`;[[ "$v" != 0 ]]&&C1 0 $1;};C3() { v=`sed -E "$s"<<<"$v"`&&C1 1 $1;};for i in 1 2;do for j in 2 3;do eval D$i$j'(){ A'$i' $1 $2 $3; C'$j' $4;};';done;done;{ A0;A2 0 $((N1+1)) 2;C0;A1 0 $N1 1;C0;B0;C2 27;B0&&! B1&&C2 28;D12 15 37 25 8;A1 0 $((N1+2)) 3;C0;D13 0 $((N1+3)) 4 3;D23 0 $((N1+4)) 5 4;for i in 0 1 2;do D13 0 $((N1+5+i)) 6 $((N3+i));done;D13 1 10 7 9;D13 1 11 8 10;D22 2 12 9 11;D12 3 13 10 12;D23 4 19 44 13;D23 5 14 12 14;D22 6 36 13 15;D22 7 37 14 16;D23 8 15 38 17;D22 9 16 16 18;B1&&{ D22 11 17 17 20;for i in 0 1;do D22 28 $((N2+i)) 45 $((N4+i));done;};D22 12 44 54 45;D22 12 39 15 21;A1 13 40 18;B2 4;B3 4 0 19;A3 14 6 32 0;B4 0 5 11;A1 17 41 20;B7 5;C3 22;B4 4 6 21;A3 14 7 32 6;B4 0 7 11;B3 4 0 22;A3 14 6 32 0;B4 0 8 11;B5 7 8;B1&&{ A2 19 26 23;B7 7;C3 23;};A2 18 26 23;B7 7;C3 24;A2 4 20 21;B7 6;B2 9;A4 14 7 52 9;B2 10;B6 9 10 4;C3 25;D13 4 21 24 26;B4 4 12 26;B3 4 13 27;A1 4 22 29;B7 12;B2 14;A4 14 6 52 14;B2 15;B6 14 15 4;B3 0 0 30;C3 29;A1 4 23 27;B7 13;C3 30;D13 24 24 32 31;D13 25 37 32 33;A2 23 18 28;B2 16;A2 16 25 33;B7 16;B3 0 0 34;B2 21;A6 47 21&&C0;B1&&{ D13 21 0 32 19;D13 10 42 32 40;D22 29 35 46 39;};D23 14 1 48 42;D12 34 43 53 44;D22 0 $((N1+8)) 51 32;D13 4 8 41 6;D12 26 28 35 34;D13 27 29 36 35;A2 27 32 39&&{ B2 19;A2 33 33 40;B2 20;B6 19 20 3;};C2 36;D23 33 34 42 37;B1&&D23 35 45 55 46;D23 32 31 43 38;D12 36 47 32 48;D13 20 42 32 41;D13 14 2 48 43;D13 4 5 32 1;D22 4 4 50 0;D13 14 3 49 5;D12 26 48 59 49;B3 4 22 57;A1 26 46 56;B7 22;B3 0 0 58;C3 47;D23 22 9 37 7;A7;C2 2;} 2>/dev/null|pbcopy;exit 2>&-
Copy the selected text to the Clipboard by pressing the key combination command-C.
7. Launch the built-in Terminal application in any of the following ways:
Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Click anywhere in the Terminal window and paste by pressing command-V. The text you pasted should vanish immediately. If it doesn't, press the return key.
8. If you see an error message in the Terminal window such as "syntax error," enter
exec bash
and press return. Then paste the script again.
9. If you're logged in as an administrator, you'll be prompted for your login password. Nothing will be displayed when you type it. You will not see the usual dots in place of typed characters. Make sure caps lock is off. Type carefully and then press return. You may get a one-time warning to be careful. If you make three failed attempts to enter the password, the test will run anyway, but it will produce less information. In most cases, the difference is not important. If you don't know the password, or if you prefer not to enter it, press the key combination control-C or just press return three times at the password prompt. Again, the script will still run.
If you're not logged in as an administrator, you won't be prompted for a password. The test will still run. It just won't do anything that requires administrator privileges.
10. The test may take a few minutes to run, depending on how many files you have and the speed of the computer. A computer that's abnormally slow may take longer to run the test. While it's running, there will be nothing in the Terminal window and no indication of progress. Wait for the line
[Process completed]
to appear. If you don't see it within half an hour or so, the test probably won't complete in a reasonable time. In that case, close the Terminal window and report the results. No harm will be done.
11. When the test is complete, quit Terminal. The results will have been copied to the Clipboard automatically. They are not shown in the Terminal window. Please don't copy anything from there. All you have to do is start a reply to this comment and then paste by pressing command-V again.
At the top of the results, there will be a line that begins with the words "Start Time." If you don't see that, but instead see a mass of gibberish, you didn't wait for the "Process completed" message to appear in the Terminal window. Please wait for it and try again.
If any private information, such as your name or email address, appears in the results, anonymize it before posting. Usually that won't be necessary.
12. When you post the results, you might see the message, "You have included content in your post that is not permitted." It means that the forum software has misidentified something in the post as a violation of the rules. If that happens, please post the test results on Pastebin, then post a link here to the page you created.
Note: This is a public forum, and others may give you advice based on the results of the test. They speak only for themselves, and I don't necessarily agree with them.
Copyright © 2014 by Linc Davis. As the sole author of this work, I reserve all rights to it except as provided in the Use Agreement for the Apple Support Communities website ("ASC"). Readers of ASC may copy it for their own personal use. Neither the whole nor any part may be redistributed.

27in iMac (late 2009) ATI 4850 drivers problem in Windows 7

This iMac is less than a month old. Windows 7 was working fine until a couple of days ago. While at the Windows 7 desktop the screen pixlated and froze. A tip bubble appeared in the notification bar that said the ATI driver quit but was recovered. The screen went black then restored itself. A moment later the whole thing occurred again. Is this a known issue? Is there a fix? Thanks for any help.

BANDING AND DRIVER CRASHING SOLVED:
I bought the following iMac on April 18, 2010 to run Windows 7 and Autodesk REVIT 2011.
27" iMac (Late 2009)
Intel Core i7, quad-core, 2.8GHz
8GB (4x2GB) memory
1TB Hard Drive
ATI Radeon HD 4850 512MB Display Adapter
Apple Magic Mouse
Apple Wireless Keyboard
Apple BootCamp with Windows 7 Ultimate
Installed OSX, downloaded and installed all updates.
Installed BootCamp 3.1
Installed Windows 7 Ultimate 64bit and had the problem of the black screen during install. This was solved with the fix from apple support (copy latest drivers to a flash drive and continue to install windows). This resulted in apple windows driver 8.681.0.0 and the 16 bit color with banding. Rolled back the driver to 8.661.0.0. The banding issue was solved, but then had intermittent crashing (reset of the driver) in Chrome and REVIT 2011. This driver caused yellow "dots", then lockup and generally would reset. Very disruptive to REVIT.
SOLUTION:
Went to ATI website and downloaded Catalyst 10.4, then manually installed ATI Mobility Radeon HD 4850 display driver version 8.723.0.0. This display driver has 32 bit color, does NOT exhibit the color banding and has not had screen flicker, driver resets, or crashing in any programs run so far. I use this computer only for Autodesk REVIT 2011. The ATI HD 4850 is not officially supported by Autodesk, but I am able to run REVIT 2011 with hardware acceleration and anti-aliasing with no problems. So far that has been only for one day, but was not able to go more than a few minutes with the previous drivers.
I have not run any speed benchmarks yet, but compared to my Windows 32 bit XP machine, the performance is much improved.

Windows XP mouse halted and screen blacked out!

When I boot up with boot camp and dragging some windows size (like IE or Excel). The mouse pointer halted and after a few seconds the screen blacked out just like the machines is turned off. However, I discovered that the system is still running. I can perform the shut down action by input from the keyboard.
The problem does not exist when I start windows xp through VMware Fusion.
Did anyone encounter the same problem??
I just bought the iMac a few days.

Thanks for your reply, I have a wireless mouse/keyboard & called manufacturer to test both & they told me to plug the wired ones in & they did not work & the laptop has no plug for wired ones because those have rounded ends, laptop has wrong size/shape usb ports, so there is no way to test them on laptop, so now I'm hoping you or someone has an idea of what to do next, thank you for your ideas.
Teddy2014 wrote:
had the same issue, un plugged mouse, reconnected in another port and it worked. Bought another mouse, all is well

Screen blacks out after latest itunes update installed

last year after installing an update for itunes my screen blacked out. it then intermittently worked for a few days before failing permanently. this was later fixed by replacing the inverter board. i didn't suspect the two events were linked. however, yesterday i got the latest update for itunes and again a few minutes after installation my screen blacked out! deja vu... it seems unlikely but is it possible the screen fault is caused by updating itunes?
this morning the screen is working again and i have run system restore to undo the installation. fine, but when i try to open itunes it starts installing again.
AJP 5600D laptop PC Windows XP

Thats odd. Not sure what this error means, but you could always try repairing disk permissions, that seems to solve most of the random errors that occasionally pop up on my OS X macs. Load the OS X install dvd into the drive then restart your machine holding the C key. choose english as the main language. Then go into the utilities menu and select disk utility. Click on your hard disk then click the repair permissions button. Once completed, restart the computer into OS X. Then try your screensaver again. If this doesnt work, post again and I'll take a closer look at it.

I just installed 16gb in my 21" iMac late 2009 and I have macbook 13" late 2008. Can I put the 2gb 2rx8-8500s-07-10-f2 ram in the laptop. Does anyone know the difference of 2gb 2rx8-8500s-07-10-f2 and 2gb 2rx8-8500s-07-10-f1 . thank you!

I just installed 16gb in my 21" iMac late 2009 and I have macbook 13" late 2008. Can I put the 2gb 2rx8-8500s-07-10-f2 ram in the laptop. Does anyone know the difference of 2gb 2rx8-8500s-07-10-f2 and 2gb 2rx8-8500s-07-10-f1 . thank you!

I followed your instructions and installed Developer Suite 10G on Windows Vista Home Premium edition. I have Oracle 11G DB running on the same machine.
Two points, Steve:
1. When I tried to set the maximum virtual memory to 6110 an error message displayed from Windows and told me that I can't set the maximum virtual memory to more than 4096. I set it to 4090 and it worked and I got nothing wrong during the installation process.
2. After installing JInitiator and disabling Java on Firefox I called the http://127.0.0.1:8889/forms/frmservlet page and everything seemed to be OK because the Oracle Forms Services logo appeared and then a successful installation message appeared , but as I clicked (ok) to continue a gray screen appeared inside the browser (like the one displayed when you try to run a Java applet inside a browser) and then I wait to death till something appears but sadly nothing. I just get a blank gray screen inside my Firefox browser.
Do you have any idea what to do to solve the problem?
Regards

Format iMac - Late 2009

I want to format my iMac (Late 2009) and i am now on Yosemite 10.10.1
and originally my iMac came with Snow Leopard ...
The original DVD for OS X installation doesn't work in the DVD drive in the iMac, each time i load it in , it makes some sounds and then ejected automatically.
i Copied the content of this DVD on an external Flash drive and external HDD as well but it couldnt work.
Any idea how to force format it ?
and also am i able to install the Yosemite directly after formatting it or i have to install several OS X in sequence starting with Snow Leopard till i reach Yosemite ?
Thank you very much for your time.

Do a backup. Boot to the Recovery Volume (command - R on a restart or hold down the option key during a restart and select Recovery Volume). Run Disk Utility Verify/Repair and Repair Permissions until you get no errors. Reformat the drive Mac OS Extended (Journaled), then click the Option button and select GUID. Then re-install the OS.
OS X Recovery
OS X Recovery (2)

IMac late 2009 - beach ball of death

My iMac is hanging a ridiculous amount - Every 30 seconds or so, no matter how few applications are running, I get the beach ball of death. It'll typically stall for a minute or more. Ugh.
I upgraded the RAM to see if that would fix the problem, and it didn't (the computer still hangs when available RAM is in excess of 10GB). I've run the Apple Hardware Test, and there were no problems reported. I've run virus scans, and there were no problems reported. I've upgraded the machine to OSX Lion, and have all of my software updated to current versions.
Please let me know if you have any ideas for a solution!
System specs:
iMac Late 2009, 21.5 inch
Processor 3.06 GHz Intel Core 2 Duo
Memory 12 GB 1067 MHz DDR3
Graphics ATI Radeon HD 4670 256 MB
Software Mac OS X Lion 10.7.2 (11C74)
Thanks,
Mike

Yes... took it back to Mac Store who sent it to their depot who did a deeper scan and it was a failing harddrive. Thank goodness for Time Machine and having backups... I am not as stressed as I would have been. However, they reinstalled it with Snow Leopard instead of my purchased Mountain Lion. When I brought it home I imported from Time Machine. But another issue reared its head and fought with its password issues (seriously, hours of work there) only to find that I could not upgrade from SL to ML on my disc. I did a check for software update from the Apple Icon (no Apple Store in SL) and it downloaded 1.6 GB of 5 updates (what appears to be the Java and others that are making the rounds currently). When this installed I was unable to log in at all, unable to get past the login screen, with some heavy duty serious lag and blue screens. So I am BACK at the Mac Store and having them do a complete wipe (again) and installation of Mountail Lion this time. In theory I should be able to take my machine with a new harddrive, Mountain Lion installed, back home and import form Time Machine.
Preach it from the rooftops and mountains... buy an external hard drive and install Time Machine. Seriously! Do it now! I am very happy that I finally, after a year, got around to doing this in time.

IMac late 2009 crashing with Maverick

I have a problem with my iMac (late 2009) that I cannot solve. It has become very slow, and crashes regularly after some time. Impossible to repair it, neither from the disk recovery partition, nor an external HD boot and using Disk Utility. So everytime I have to download Maverick again and install it to be able to work. I have noticed that after the fresh installation, and and a few days of working, Disk Utility shows problems with Disk permissions that need to be repaired. This occurs systematically.
To complete the story, the iMac was working fine when I bought it, but was returned to Apple for the HD substitution (Apple replacement programme). After this, and/or after installing Maverick (but I am not sure the 2 things are related), the problem started.
I have also tried PRAM resetting, no effect. Any suggestion?

For 2009 iMac owners on Mavericks, I recommend this procedure. Saved me a lot of frustration after almost a month of constant crashes and getting no work done.
I downloaded a temperature monitor to see what was happening. Before the fix, the temperature on the "north bridge heat sink” would just go up and up without fail. Particularly when using flash or a video related application. It would just keep rising until until the graphics card just shuts down.
It’s a 3 year old bug related to 10.6.3 and GPU drivers (ATI/AMD). Here’s the link to the guy who figured it out and should be testing for apple. You have to use terminal to solve the issue. He explains everything in detail.
http://www.pauloamgomes.net/blog/fix-weird-os-x-freeze-imacs-late-2009
After the fix, the temperature at the graphics card stays level. I’ve also decided to use a fan control app for the moment so temperatures stay around 50 and the iMac runs like it should. Even in my hot room in the summer.
Been crashless since doing the procedure. Try it out. better than lugging a 27" iMac around town.

14" iBook screen blacks out

This is the third time it's done it today and the 5th time ever. My AppleCare ran out the middle of March, so I guess they are right on in determining when it's time to get a new computer.
When it blacks out, it just goes immediately, no flickering, no warning whatsoever. I can still see the desktop underneath the black and I can still move the cursor. I don't know anything what the insides are like, but the apple light on the top of the case goes out when the screen blacks out.
When I closed the top and opened it again, it brought the screen back up right away. But this last time, it took a few closing and openings to get it to come back up, making me think it's going to get worse.
Last week was the first time it ever went black. I initially thought it was falling in to sleep mode and held down the power key to get it to reboot. I'm pretty sure sleep has nothing to do with it, but I set my display to not go to sleep at all today to find out. It's blacked out twice since.
I don't use a screen saver, it's happened on battery and power adapter. Other people have mentioned the fan not running, I can't remember ever hearing my fan run or else it's just so quiet I can't tell the difference between it and the hard drive.
My iBook is a late 2004 model 14" 1.33 and, I just upgraded to Tiger (coincidence?) There have been no other problems to speak of other than the keyboard losing letters, battery needing to be replaced and the usual airport glitches. It hasn't been dropped or spilled on. Any suggestions on how to fix this and what I might be looking at when/if taking apart the screen?

It sounds like you might have a bad inverter cable, especially since it is affected by the position of the display. I think this is just a mechanical failure of the cable caused by many openings and closings of the display.
You might check out the troubleshooting section of the ifixit site and read about the inverter cable and see if it sounds like what is happening to you. I gather it is a real job to replace it. Ifixit and Powerbookmedic would be two good resources:
http://www.ifixit.com/
http://www.powerbookmedic.com/
Since the job is considered very difficult, I'm not sure there are any instructions on how to do this on these sites. But there is another manual that might be helpful:
http://node123.cit.geneseo.edu/~stratton/ServiceManuals/
This is just the index. You will have to find the one for your iBook. Powerbookmedic also has a good manual.
It may also be possible to repair the cable, but I don't know. Spudnuty is the real expert here, and hopefully he will see this and be able to offer you more specific advice.
Good luck!

IMac late 2009, screen blacks out running Yosemite 10.10.2

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