Various Screen Problems with iMac G5 20" 1.8
I have a iMac G5 20" 1.8 running 10.4.3 with 2GB RAM
I bought it in July 2005 on Ebay in the UK (the previous owner bought it in January 2005)
The Mac ran fine for months until the start of November when I started having all these problems (which many other iMac G5 20" 1.8 owners are having around the World):
1. Screen is sometimes darker at the top than the bottom after I have started the Mac up (this sometimes fixes itself if I do a Restart).
2. Screen sometimes starts up darker all over (in a slight pinkish hue colour).
I have tried all the usual things that people have suggested on this Discussion Board and many other Apple Message Boards to try and sort these problems but nothing seems to fix it.
I have tried resetting the PRAM
I have tried re-installing the OS.
Why was the iMac was fine for almost 6 months and then the problems started occurring?
Was it because I installed OS X 10.4.3? Because it was around that time when the problems began
Has anyone else managed to get Apple to fix these problems that they've been having with their iMac G5's under Apple's current iMac G5 Repair Extension Program for Video and Power Issues?
iMac G5 Repair Extension Program for Video and Power Issues
See this webpage:
http://www.apple.com/support/imac/repairextensionprogram/
How long did the repair take?
Is there a risk that I could be charged for any repairs?
My Serial Number is one of the serial numbers that is mentioned in the Repair Extension Programme
Hi
I have made a discovery!
When I start up in Safe Boot Mode I don't have any Kernel Panics/Crashes or Screen Freezes, etc any more!!??
Is this a good thing?
Can I use my iMac in Safe Mode all the time? Everything is working and enabled in Safe Mode apart from sound and some fonts from what I have found out so far. (I read that sound won't work in Safe Mode)
Does this mean that the problems I have been having are not Hardware problems after all and are only Software Conflicts/Issues?
I await all your replies with interest!
Cheers
Similar Messages
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Screen Problems with iMac G5 20" (iSight)
Hello!
I had the same problem with my iMac G5 20" (iSight) as described by Bob North Apr. 18, 2006 at http://www.macintouch.com/readerreports/imacg5/topic2276.html#apr25:
"""" I repair Apple products, and recently I've seen strange and erratic display problems with the G5 flat-panel (iSight) 17" and 20"...and I am very curious about the origin. The picture will display what I will call "plaid pixles". Upon boot, the dispaly appears normal, but within 5-10 minutes, either at desktop or in ASD, the normal display will "crash" to the "plaid" display. The desktop, or whatever, can still be distinguished in the background, but it is overwashed by the plaid patterns -- which do change slightly, and also cover the full space of the screen. I've seen different scenarios, 3 in 2 weeks, where the symptom is exhibited with no particular failure pattern -- both before and after repair. I've replaced the main logic on one occasion, with no fix...but the 2nd try replaced both display panel and inverter. The display issue was fixed, but the system exhibited lockups only when it reached the destop. Another repair the same issue was seen after replacing the 20" main logic, where the symptom was not present previous. Personal opinion of the late 2005 IMAC flat-panels, in the hardware sense, is the likelihood of component manufacture issues, possibly the main logic boards or the panel displays themselves. Repair of this model, as opposed to the earlier, non-iSight flat-panel 17 and 20" models are extremely difficult -- access to main componenets is blocked by the display panel, which must be removed for each troubleshooting attempt. The internal hardware design is not oriented for repair ease...they are by far the most difficult to work on.
Any input regarding the display issues? Thanks.""""
I can't use the mouse or anything else, and after a while the fans start to go on max. This is the second time I encounter this problem within 30 days. What I have noticed is that the day before, the brightness of the screen started to "blink" slightly -- like if the screen tried to adjust itself.
But I haven't experienced what Bob North describes as the: "Upon boot, the dispaly appears normal, but within 5-10 minutes, either at desktop or in ASD, the normal display will "crash" to the "plaid" display".
I just restart with the power button and everything is working OK. I made an Extended Hardware test without any problems detected.
I have been looking for this issue with iMac G5 20" (iSight) and only found it at http://www.macintouch.com/readerreports/imacg5/topic2276.html#apr25 :
Apr. 18, 2006
bob north
I repair Apple products, and recently I've seen strange and erratic display problems with the G5 flat-panel (iSight) 17" and 20"...and I am very curious about the origin. The picture will display what I will call "plaid pixles". Upon boot, the dispaly appears normal, but within 5-10 minutes, either at desktop or in ASD, the normal display will "crash" to the "plaid" display. The desktop, or whatever, can still be distinguished in the background, but it is overwashed by the plaid patterns -- which do change slightly, and also cover the full space of the screen. I've seen different scenarios, 3 in 2 weeks, where the symptom is exhibited with no particular failure pattern -- both before and after repair. I've replaced the main logic on one occasion, with no fix...but the 2nd try replaced both display panel and inverter. The display issue was fixed, but the system exhibited lockups only when it reached the destop. Another repair the same issue was seen after replacing the 20" main logic, where the symptom was not present previous. Personal opinion of the late 2005 IMAC flat-panels, in the hardware sense, is the likelihood of component manufacture issues, possibly the main logic boards or the panel displays themselves. Repair of this model, as opposed to the earlier, non-iSight flat-panel 17 and 20" models are extremely difficult -- access to main componenets is blocked by the display panel, which must be removed for each troubleshooting attempt. The internal hardware design is not oriented for repair ease...they are by far the most difficult to work on.
Any input regarding the display issues? Thanks.
Apr. 19, 2006
Robert Mohns
bob north describes: "...recently I've seen strange and erratic display problems with the G5 flat-panel (iSight) 17" and 20"...and I am very curious about the origin. The picture will display what I will call "plaid pixles". Upon boot, the dispaly appears normal, but within 5-10 minutes, either at desktop or in ASD, the normal display will "crash" to the "plaid" display. The desktop, or whatever, can still be distinguished in the background, but it is overwashed by the plaid patterns -- which do change slightly, and also cover the full space of the screen."
Does it look anything like this?
http://downwardspiral.net/gallery/pbg4-display
My nearly 3 year old Titanium PowerBook G4 just did this one day, out of the blue. The problem went away after a few minutes, but I had already taken photos. Thanks to those photos, Apple gave the powerbook a new logic board.
(This PowerBook has had its logic board replaced twice, a new optical drive, and a cracked case edge replaced. AppleCare has more than paid for itself. Despite the occasional problems, I remain very happy with this machine. I'm sure I'd be much less happy if I had not bought AppleCare!)
HubertHubert Frank,
To Apple Discussions!
What troubleshooting methods have you tried to solve your issue?
The knowledgeable users will need this info to avoid the "been there, done that" senerios.
Have you tried the methods mentioned in the following Knowledge Base Article?
http://docs.info.apple.com/article.html?artnum=301283 Troubleshooting when there's no picture on the display
Do you have AppleCare? If so, have you contacted them? If so, outcome? -
I had a problem with imac screen going black. apple store diagnosed prob with video card which they replaced. Brought it home, turned it on (have done this 4 times) it starts up, wheel turns, there is a long bar at bottom which fills up, then it turns off
Apple guarantees their work, take it back.
-
I have a problem with Imac mid 2010 graphics card (ATI Radeon 5670 512MB)
I have a problem with Imac mid 2010 graphics card (ATI Radeon 5670 512MB). When I play video formats like xvid, mkv, avi iMac freezes and emits horrible sound,in service said the problem is not overheating. Not a problem with memory or hard disk because I placed second correct parts.The same problem is with OSX 10.6.8 and 10.8.4 and other players.Apple hardware test found no problem and tech tool pro found no fault.
After five days of testing in the service they can not found fault and it was decided to change the graphics card.
New graphics have been tested for two days but it is not reproduced divx ... but their test software which did not find any fault on the old graphics...
Do I have the right to complain if repair does not fix the problem because I use non apple softwere and video formats.You could look at the System Profile for the info it presents for the card. But why wouldn't you think it's not up to date if you have the latest install (according to your sig above)?
What program are you trying to run? Is there anything in the system log?
I think it's the program that's having the problem and not anything with your video software. -
Problems with iMac retina 5K (artifacts, glitches and etc.)
Hello dear Apple.
I have bought new iMac with retina 5K display and I have found lot of problem with it. It was December 2014 when I got my first iMac. And after then I have found few real problems with it.
The first problem is I can't open high resolution image with standard Preview.app. I mean 'high resolution' - more then 30-40 megapixels. When I open them, I can see image, but only 2-3 seconds, and after that I see horizontal artifacts only. I can't open images, like this Rembrandt.jpg; Carpaccio.jpg; Holbein.jpg
The second problem, when I change resolution in to scaled mode (System Preferences/Display) for increase image on display. I found when select some area on background of desktop it has left some lines after itself. It is particularly unpleasant if you have plain colour desktop background. You can view, how does it look here.
The next problem with animation in different parts of interface, e.g. sometimes when I open Time Machine some parts of windows are freezing or appear some artifacts or glitches near borders of window. And I have the same situation, when I open Mission Control, or any Adobe app or other, or simply rename a files. I have found few discussions with problems like mine, but in the separate places
5K iMac - bad GPUs?
Graphic Problems with Retina iMac
iMac 5K and indesign glitch
And after that I want to tell you that I have this problems on four (4) iMacs. It was really difficult to arrange four replace. I have lost a lot of time an spent a lot of nerves for discuss and resolve my problems with Apple support. Finally, they told me that they do not know about problems with iMacs, and they could offer give my money back. I glad to get my funds, but now in my country price for iMacs has doubled. And if they refund my money, I can buy half new iMac only.
I am sorry for my language and style, but I do not know what I should doing with that. And should I hope, that my problem resolve with OS X updates? Or it is hardware problem of the whole iMacs 5K...Yes Ralph, absolutely correct, 4 times. Do you have the graphic card the same as me, or m290? Could I ask you check your iMac for few things, please?
For the first, can you enlarge scale in System preference/Display and install plain dark color desktop background. Are there any footprints after rectangular selection like in my video https://youtu.be/dBglFvjJx1Q?
And for the second, could you download this image https://upload.wikimedia.org/wikipedia/commons/0/07/Rembrandt_Harmensz._van_Rijn _-_Nachtwacht_-_Google_Art_Project.jpg and open in plain Preview.app, and zoom it? Are there any glitches?
Thank forward. -
Hi i have a white screen problem with my macbookpro mid2009 15".I installed a ifixit battery and i think it screwed up one owc ssd drive.I just installed a new one and at 13min battery left it shut down and then all i got was a white screen...I tried every feasible command and all i got was some more white lol.I dont have my tools to open the case right now but do you guys think my cpu board is done?
Have a look at this help document for suggestions that you haven't tried yet:
http://support.apple.com/kb/TS2570 -
Problems with iMac 21.5 inch screen
Dear all,
As you can see on the pictures I have the following problems with my iMac. I get spots if I have to drag folder for example or when I open a picture in Preview. It is a normal background picture but if I open it in preview I get dots and since Maveriks it has become more worse. I get real weird lines.
I have the following iMac 21.5 inch:
- 21.5-inch, Mid 2010
- 3.6GHz Intel Core i5
- 8 GB 1333 MHz DDR3
- ATI Radeon HD 5670 512 MB
I have already tried:
- New internal memory;
- Reinstall OS X;
Apple can not really help. They also do not know what is problem. I also have no apple warranty.
Would anyone help me with this? You are my last attempt.
Thanks in advance.My guess is your GPU (graphics processing unit) is failing. Take the machine to your local Apple Store and have a Genius examine it or take it to an Apple Authorized Service Provider (AASP). Please click https://locate.apple.com/country to begin looking for an AASP in your area.
-
MacBook Pro 15" Late 2011 Problems with iMac 27" Late 2009 TDM
Hi,
I just got problems with my iMac 27" Late 2009 (Mini-DisplayPort) and my MacBook Pro 15" Late 2011 (Thunderbolt).
When I try to use my iMac as external monitor for my MacBook, there are massive glitches and graphical bugs on my second screen.
I bought a MDP-to-MDP wire from Belkin which works perfect on other computers.
I tried these things:
- Disconnected MagSafe from MacBook + unplugged all USB devices + switched graphics to discrete.
- Shut down all computers ... then booted MBP, iMac and triggered CMD+F2
- SMC, PRAM reset on both devices
The cable works, because:
17" MacBook Pro Late 2011 works perfectly on my iMac screen with my Belkin wire!
I connected my MacBook Pro 15" to a 27" Cinema Display and it works flawless.
After that I plugged it out and tested it again with my iMac screen -> suddenly it works.
Retriggering CMD+F2 or replugging breaks it again with massive bugs.
The MacBook Pro 17" is on 10.7.2, 15" is on 10.7.3, but I also tried to trigger dual screen in 10.7.0 setup with the same issue.
Maybe its a problem with the internal 6750M of my MacBook Pro 15"?
The 6770M of the 17" is working well.
Sample Video:
http://www.youtube.com/watch?v=W_pgc52syes
All updates/firmware updates of iMac and MacBook Pro are installed.
Any solutions?
Greets,
KaiSince this is a user to user forum with no employees participation, your plea is a good a screaming into the wilderness. I suggest that you post your thoughts here:
https://www.apple.com/feedback/ -
Reboot problems with iMac dual intel 1.83 OS 10.4.6
Needing help. Mac user since 1999 but I'm feeling like a novice with this. Wife was playing Sims 2 when it locked up and wouldn't allow the game to be turned off. Did a forced restart, disk went to the grey screen with the spinning gear for an extended period. Went to bed and the next morning the blue screen was on with OS X label as if computer was booting successfully but the hard drive sounded as if it was stuck in a loop. Got the installation disc and figured out how to eject the game and install the disc. Did safe boot and computer will goto the grey screen with the spinning gear and then will turn itself off.
Tried to reinstall OS X 10.4.4 while archiving in a separate folder and after verifying the disc the install fails. Ran hardware check came back o.k. Tried to boot from install disc and it just takes me back to the install disc start-up. Ran disc utility to repair premissions and it hung up after 30 minutes and the hard drive sounded like it was stuck in a loop. Ran disc utility to repair hard drive, first checks came back o.k. and then stated it was not completed due to an underlying issue when it tried to back out.
The hard drive is partitioned from boot camp, deleted windoze and tried to install OS X on the 20 gigs partitioned. The disc again verified but then failed- which threw me for a loop (does not appear dirty or scratched). My intention was to boot up on the partition and then try to retrieve pictures and videos on the hard disc, unfortunately only 1/2 is currently backed up.
I have not tried fsck yet because I was confused how to get to it, I think I am supposed to use the start up disc and go to the terminal application then enter the command, is this correct?
Unfortunately I am having to type this at work while the computer is at home- so if there are suggestions please dump them on me and I will try all of them tonight. No broken folders, kernal panics or exclamation points thus far.
Thanks for all the help.Welcome to Apple Discussions!
When you verified with disk utility the disk, you basically ran fsck. Permissions are another factor here, but the fact it failed the disk check suggest major directory problems with the hard disk. Unfortunately the only third party directory repair utilities that I know work well currently are for PowerPC Macs only. If you have another Mac, suggest putting the iMac in target disk mode and see if it is seen by the other Mac. The target disk mode is described by this article:
http://docs.info.apple.com/article.html?artnum=58583
If it is, then you can recover your data.
If it is not, my suggestion is to get an external Firewire hard drive, and Prosoft Data Rescue and see if it is able to recover the information to it.
http://www.macsales.com/ sells equivalent Firewire hard drives for good prices, and http://www.prosofteng.com/ is where to get Data Rescue.
In addition, there may be suggestions people in the Boot Camp forum can offer:
http://discussions.apple.com/forum.jspa?forumID=1165
My suggestion is to find a way to completely and safely remove Boot Camp and only use it on non-production machines.
I don't think your problem is an online networking issue, which I see you posted in that forum. -
Problems with iMac since Mountain Lion upgrade
So , several problems that I have experienced since upgrading to Mountain Lion.
1. When I "log off" off my iMac from the top left "apple" symbol, I get the rainbow wheel of death.
2. When accessing YouTube home screen or yahoo in Safari, the page is a white screen. Nothing more, nothing less.
* I have been reading some people saying that this happens to them too, but only when using an account with parental controls.
3. Hard drive "grinds" incessantly.
* I have never even seen the rainbow wheel or heard my hard drive grind on my iMac untill this upgrade.
Anybody know of any solutions, or also having these issues?For anyone else having the "white screen" issue with youtube, and/or yahoo issue. I seemed to have repaired the issue. I turned the parental controls off for both of my kids accounts, restarted my Mac, and the problem vanished.
I also turned the parental controls back on after this, restarted the computer, and the problem came back.
*** This is 100% a Parental Control/Mountain Lion glitch. Hopefully Apple knows and is working on a solution. The sooner they fix it, the sooner I can turn the parental controls back onto my kids accounts. -
Today I bought a new i5 iMac with 8Gig of ram. I had massive problems with the instillation of Lion. I spoke with Apple for nearly 1.5 hours. I finally got it working and now it has crashed 9 times in 30 minutes. Why?? Please Help. I am going to take it back to the shop tomorrow.
Thanks fro your quick reply.
I get the slow darkened screen that moves down the until it says that I have to hold down the poer button for a forced restart.
I tried opening all the really big memory hogs ll at once, eg Final cut pro, apature, imove HD etc, and that was no problem. It seem sto be completly random.
This is the report that I get:
Interval Since Last Panic Report: 387 sec
Panics Since Last Report: 6
Anonymous UUID: 5400E7FB-D8A1-4CDD-985D-3F1E8023753D
Fri Aug 26 23:00:24 2011
panic(cpu 2 caller 0xffffff80002c268d): Kernel trap at 0xffffff8000293188, type 14=page fault, registers:
CR0: 0x0000000080010033, CR2: 0xfffffb8009a19ac8, CR3: 0x000000000eaeb00f, CR4: 0x00000000000606e0
RAX: 0xffffff8009a36e78, RBX: 0xffffff8009a466d0, RCX: 0xffffff80008bd800, RDX: 0x00000000000000e0
RSP: 0xffffff80f2b23d80, RBP: 0xffffff80f2b23da0, RSI: 0xffffff8009a1bec0, RDI: 0xffffff80008bd8e0
R8: 0xfffffb8009a19ac0, R9: 0xffffff80f2b23ef8, R10: 0x00000001136ef000, R11: 0x0000000113650f80
R12: 0xffffff80008bcc00, R13: 0x0000000000000000, R14: 0x0000000000000072, R15: 0x000000000000000e
RFL: 0x0000000000010202, RIP: 0xffffff8000293188, CS: 0x0000000000000008, SS: 0x0000000000000000
CR2: 0xfffffb8009a19ac8, Error code: 0x0000000000000002, Faulting CPU: 0x2
Backtrace (CPU 2), Frame : Return Address
0xffffff80f2b23a40 : 0xffffff8000220702
0xffffff80f2b23ac0 : 0xffffff80002c268d
0xffffff80f2b23c60 : 0xffffff80002d7a3d
0xffffff80f2b23c80 : 0xffffff8000293188
0xffffff80f2b23da0 : 0xffffff80002958b2
0xffffff80f2b23dc0 : 0xffffff800026c5ba
0xffffff80f2b23f40 : 0xffffff80002c1f2b
0xffffff80f2b23fb0 : 0xffffff80002d7961
BSD process name corresponding to current thread: WebProcess
Mac OS version:
11B26
Kernel version:
Darwin Kernel Version 11.1.0: Tue Jul 26 16:07:11 PDT 2011; root:xnu-1699.22.81~1/RELEASE_X86_64
Kernel UUID: D52AAB80-B2BC-3C6E-BBEA-78BD28064998
System model name: iMac12,2 (Mac-942B59F58194171B)
System uptime in nanoseconds: 492863372471
last loaded kext at 51964964367: com.apple.driver.AppleBluetoothHIDKeyboard 152.3 (addr 0xffffff7f81cbc000, size 12288)
last unloaded kext at 223039016620: com.apple.driver.AppleUSBUHCI 4.4.0 (addr 0xffffff7f80ab5000, size 65536)
loaded kexts:
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Model: iMac12,2, BootROM IM121.0047.B0A, 4 processors, Intel Core i5, 2.7 GHz, 8 GB, SMC 1.72f1
Graphics: AMD Radeon HD 6770M, AMD Radeon HD 6770M, PCIe, 512 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1333 MHz, 0x02FE, 0x45424A3231554538424655302D444A2D4620
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1333 MHz, 0x02FE, 0x45424A3231554538424655302D444A2D4620
Memory Module: BANK 0/DIMM1, 2 GB, DDR3, 1333 MHz, 0x802C, 0x000000000000000000000000000000000000
Memory Module: BANK 1/DIMM1, 2 GB, DDR3, 1333 MHz, 0x802C, 0x384A53463235363634485A2D314734443120
AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x9A), Atheros 9380: 4.0.55.4-P2P
Bluetooth: Version 2.5.0f17, 2 service, 19 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: ST31000528AS, 1 TB
Serial ATA Device: HL-DT-STDVDRW GA32N
USB Device: FaceTime HD Camera (Built-in), apple_vendor_id, 0x850b, 0xfa200000 / 3
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfa100000 / 2
USB Device: Maxtor 3200, 0x0d49 (Maxtor), 0x3200, 0xfa120000 / 6
USB Device: External HDD, 0x1058 (Western Digital Technologies, Inc.), 0x1003, 0xfa130000 / 5
USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 4
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8215, 0xfa111000 / 7
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfd100000 / 2
USB Device: hub_device, 0x050d (Belkin Corporation), 0x0234, 0xfd140000 / 5
USB Device: DataTraveler 2.0, 0x0951 (Kingston Technology Company), 0x1607, 0xfd142000 / 7
USB Device: Basics Desktop, 0x0d49 (Maxtor), 0x7410, 0xfd143000 / 6
USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0xfd110000 / 4
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd120000 / 3
I got this photo from the net, but this is what I get. (Now 12 times)
It was a 4 Gig ram imac, but the store made it up to 8 gig with 4x2 gig before I collected it.
Memory Slots:
ECC: Disabled
BANK 0/DIMM0:
Size: 2 GB
Type: DDR3
Speed: 1333 MHz
Status: OK
Manufacturer: 0x02FE
Part Number: 0x45424A3231554538424655302D444A2D4620
Serial Number: 0x245317A8
BANK 1/DIMM0:
Size: 2 GB
Type: DDR3
Speed: 1333 MHz
Status: OK
Manufacturer: 0x02FE
Part Number: 0x45424A3231554538424655302D444A2D4620
Serial Number: 0x245317A9
BANK 0/DIMM1:
Size: 2 GB
Type: DDR3
Speed: 1333 MHz
Status: OK
Manufacturer: 0x802C
Part Number: 0x000000000000000000000000000000000000
Serial Number: 0xFFFFFFFF
BANK 1/DIMM1:
Size: 2 GB
Type: DDR3
Speed: 1333 MHz
Status: OK
Manufacturer: 0x802C
Part Number: 0x384A53463235363634485A2D314734443120
Serial Number: 0xEA364A5A -
I've had my iMac for a little over a year and now I am having problems with programs not opening, but then not being able to close. the arrow is under them but no matter how many times I force quit it won't close. Happens mainly with Toast and Itunes. Also, sometimes the computer will go to sleep and I can't get it to wake up. when this happens the fan just goes crazy. I have reset permissions and verified permissions. I have run the OSX disk with hardware utility and everything checks out fine. Will I have to reformat or just not use it anymore?
JasonJason -
Sometimes zapping the P-RAM helps:
1. After the startup tone, hold down <cmd><opt><r> until 3 additional startup tones are heard, then release the 4 keys.
Sometimes doing the Open Firmware resets helps:
1. After the startup tone hold down <cmd><opt><O><F> until a text screen appears (that's the letter Oh, not the number zero).
2. When you can start typing, enter the following commands, following each command by pressing <return>.
reset-nvram
set-defaults
reset-all
The mac will start normally at this point.
If still not successful, try this as well:
After the startup tone, hold down the <shift> key until you (hopefully) reach the desktop. This start is called "Safe Start" and it will be longer than normal, because Disk Utility's "repair" is invisibly run; it also will bypass any login items. If the system gets to the desktop OK this time but stalls when the shift key is NOT held down, the problem may be some login item that will need to be removed, using the Accounts panel of System Preferences and its Login Items section.
If none of these suggestions work, you may be required to perform an Archive and Install re-installation of the Mac OS. This is one of the options presented by the OS installer when you run it, and it preserves all your settings, data and added programs, but puts a new copy of the OS on the hard drive from which to boot.
Please let us know how you make out,
Miriam -
Problems with iMac G5 not starting properly
Hello!
I am having troubles with my iMac G5 + iSight. It will only start in safe boot, and when it does it has some funny lines across the screen.
I know that it is not a hardware problem particularly because it used to boot fine sometimes and then only in safeboot.
I am wondering whether it is a firmware problem, or I need to reinstall the OS. I think it is a firmware problem because when I press option key on startup, that has the funny lines as well, so it may well be.
If anyone could please tell me where I can download a firmware updater/reinstaller and how to do it, I think it may fix the problem.
Thanks!I do not know why your iMac has lines on it. As for not booting in normal mode, there are lots of cauuses for that. None of the causes has to do with firmware.
I suggest you take it to an Apple store.
I am having troubles with my iMac G5 + iSight. It will only start in safe boot, and when it does it has some funny lines across the screen.
-- I do not know why the lines are there. May indicate a problem with lcd.
-- Could you try attaching another monitor to the iMac. there is a mini-vga port.
I know that it is not a hardware problem particularly because it used to boot fine sometimes and then only in safeboot.
-- how do you know this? Working in safe mode doesn't use the video chip. Normal mode does. Bad video chip is suspected.
I am wondering whether it is a firmware problem, or I need to reinstall the OS. I think it is a firmware problem because when I press option key on startup, that has the funny lines as well, so it may well be.
-- You like to rule out hardware problems. My reading would be this is an indication of a bad lcd or cabling.
-- I'd re-install os. Could be a corrupt hd or bad hd. I'd erase the entire drive & reinstall.
Sometimes if volumes don't appear in Startup Manager (what you get when you hold down the Option key at startup), you need to reset the Mac's PRAM, NVRAM, and Open Firmware. Shut down the Mac, then power it up, and before the screen lights up, quickly hold down the Command, Option, P, and R keys, until the Mac has chimed twice more after the powerup chime. Then, before the screen lights up, hold down Command-Option-O-F until the Open Firmware screen appears. Then enter these lines, pressing Return after each one:
reset-nvram
set-defaults
reset-all
"The reset-all command should restart your Mac. If so, you have successfully reset the Open Firmware settings."
http://support.apple.com/kb/TS1812?viewlocale=en_US
How to eject a cd from the internal cd drive:
eject cd
List of devices:
devalias
List of variables:
printenv
If anyone could please tell me where I can download a firmware updater/reinstaller and how to do it, I think it may fix the problem. -
Strange Boot problem with iMac OSX 10.7.5 (Boot loop, not working safe boot etc.)
Hey guys,
I've got a strange problem with my iMac Late 2009. This morning it didn't want to boot (grey screen with turning wheel). Yesterday when I shut it down everything was fine. Last backup was finished three minutes before. So I was a bit shirty but noch scared of any data loss.
I tried the following things:
1. boot recovery and check hdd (it's a new one, only second day back from apple store for replacing seagate hdd), everythings fine
2. try to boot in safe mode, did not work!
3. try to boot in verbose mode, did work until it stopped. Screenshot of the last lines of log is within this post
4. I used my TM backup and afterwards I could boot! Strange, because as I sad the backup finished a few minutes beforce I left my mac and shut it down
Now I'm a bit scared of shutting it down again But what would be the next step to find the error? My first thought were some third party kernel extensions, but that would not affect a safe mode boot, am I right? I have a Macbook Air here which is setup nearly identical to my mac and it's working. Could it be a hardware fault? Maybe you've got an idea.
Thanks!
Maxat the moment it seems to be a corrupted time machine backup from my old hard drive (new one has a runtime of 27 hours). So I'll will try a clean install of my system at least, when I got the time. sh%&$ !
-
General problems with iMac displays
Why is it about iMacs that has these pseudo "burn-in" issue with their displays?
Is this due to cheap component (LG panels)?
Or is this some scheme by Apple to make people pay?
Or both?
I am a proud mac (for that I have insulted enough PC and Linux sinners), but during the day I am forced to be a PC at work. But I have NEVER EVER seen any image persistence on any make/model of 3rd party LCD monitors before. My iMac is currently connected to a Samsung LCD monitor, and when my "dangle" a window (say Safari) between 2 monitors and leave both screens ON for 5 hours, my iMac monitor gets the "burn-in", but the Samsung doesn't.
Maybe 5 hours is a bit extreme, but I am starting to see faint "gridlines" showing up on my screen after I had my Excel open for more than 40 minutes.
What gives?You are not alone with regards to this issue with the screen.
http://discussions.apple.com/thread.jspa?threadID=1446926&start=0&tstart=0
http://discussions.apple.com/message.jspa?messageID=12248055#12248055
Apple does not seem to want to acknowledge that this is a problem and will probably tell you that the issues are "environmental" and do not see any problem with it.
I have a similar set up with a Samsung monitor connected and have not issue with the Samsung.
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