My macbook pro shows blank screen when I started..help me..

My macbook pro shows blank screen when I started . (It's like in same state when power off. ) fan sound and hard disk is running. So i connected it Through external monitor via mini display to VGA cable. I can see everything on external monitor. My display of Mac needs to change? How much it cost ?? I found so many forum discussion said that if nvedia card is faulty then its happen...let me know suggestions...I given it to apple care service station n they r telling yr display needs to change its cost me a lot.. I can't afford. And can't spend that much for 3 yr old version as new versions of macbook pro is cost vice reasonable.. can I have any suggestion?

If running 10.7 or later hold down Command-R at Startup.
This should invoke recovery Mode.
Choose Disk Utility.
Select your Hard drive. Inspect the SMART Status in the lower right of the window for "Verified".
Select the Mac OS X Volume (originally Macintosh HD) click (Repair Disk)
If errors, run again until it comes clean or gets stuck.
Report any error messages.

Similar Messages

HT201236 MY MACBOOK PRO SHOW BLUE SCREEN WHEN I SET UP OS.....

when i try to set up mac os in my probook,its show blue screen.how can i solve it?

Maybe:
OS X Mavericks: If you see a blue screen at startup
Yes even though you have Yosemite
http://macs.about.com/od/MacTroubleshootingTips/qt/Troubleshooting-Mac-Startup-P roblems-Stuck-At-The-Blue-Screen.htm

My macbook pro out of screen when i switch from windows to mac

my macbook pro out of screen when i switch from windows to mac , mac is running but out of screen , what should i do??

my macbook pro out of screen when i switch from windows to mac , mac is running but out of screen , what should i do??

Ipad 3rd gen shows blank screen when connecting to projector via HDMI AV adapter. I have an ipad 2 that works perfectly. Projector is a Dukane ImagePro 8106HA. Only difference I see is that the ipad 3 owner has not updated to IOS 6. Any thoughts?

Ipad 3rd gen shows blank screen when connecting to projector via HDMI AV adapter. I have an ipad 2 that works perfectly. Projector is a Dukane ImagePro 8106HA. Only difference I see is that the ipad 3 owner has not updated to IOS 6. Any thoughts?

Ipad 3rd gen shows blank screen when connecting to projector via HDMI AV adapter. I have an ipad 2 that works perfectly. Projector is a Dukane ImagePro 8106HA. Only difference I see is that the ipad 3 owner has not updated to IOS 6. Any thoughts?

My Macbook Pro Showing White Screen At startup

Macbook pro showing white screen after loading window
i think its not booting to hdd
What shoud i do??
Message was edited by: Krishnaraj7777

Krishnaraj7777,
you can try this: boot your MacBook Pro into Recovery mode by holding down a Command key and the R key as it starts up. Once the OS X Utilities menu appears, select Disk Utility. On the left-hand side of the Disk Utility window, select your internal disk’s boot partition (typically called “Macintosh HD”). On the right-hand side, press the Verify Disk button if it’s not greyed out; if it is greyed out, or if it reports that errors were found, press the Repair Disk button. Once the verification/repair is completed, exit Disk Utility and select Restart from the Apple menu to restart in normal mode. Do you get past the white screen now?

Tried to reinstall OSX Mountain Lion 10.8.4 and every time i start with the installation i get a requested time out message, had to shut down my MacBook Pro retina. Now when i start up it automatically start internet recovery

tried to reinstall OSX Mountain Lion 10.8.4 and every time i start with the installation i get a requested time out message, had to shut down my MacBook Pro retina. Now when i start up it automatically start internet recovery for two ouers. After the internet recovery the same problem with reinstalling OSX message

Gave up on the GUI. This script derived from http://blog.netnerds.net/2012/07/os-x-how-to-setup-nat-on-lion-and-mountain-lion / seems to work for me:
gwdev=en0 # This is my WiFi connection (has Internet connection)
targetdev=en1 # This is the USB to Ethernet adapter (to give Internet connection)
/sbin/ifconfig $targetdev down
/sbin/ifconfig bridge0 create
/sbin/ifconfig bridge0 up
/sbin/ifconfig bridge0 addm $gwdev
/sbin/ifconfig bridge0 $HOST_ADDR
/sbin/route add default -interface bridge0 -ifscope bridge0 -cloning
/usr/sbin/sysctl -w net.inet.ip.forwarding=1
/sbin/ipfw add 100 divert natd ip from any to any via $gwdev
/usr/sbin/natd -interface $gwdev -use_sockets -same_ports -unregistered_only -dynamic -clamp_mss -enable_natportmap -natportmap_interface $targetdev

Macbook Pro 17" Black screen when selecting Windows 7

I got a Macbook Pro 17", late 2010 that has been experiencing an issue when selecting Windows 7 as my Boot OS. This is an intermittent issue. It happens like once every 8 or 10 usage. I already took it 2 the Apple Geniuses twice and I was turn around because, They say, They don't do Windows.
At this point, I'm hoping that Apple will come out with a Firmware Update or anything that will fix this issue. I know There are other users in the same boat as me or worst waiting for Apple to come out with a remedy.

You might want to reformat and re-read what you had.
Apple Boot Camp Support
Black Screen iMac
I recommend buying Paragon NTFS if you really need to write to Windows (you shouldn't, I never have but had used NTFS driver at one time).
PARAGON Software
Camp Tune Paragon-Software

My Macbook Pro crashes(Grey Screen) when i unplug my 3G USB Dongle

Not sure if this has happened to anyone else, but just after I installed Yosemite my 3G USB dongle Huawei K4305 Vodafone is not working anymore and when I unplug the dongle my macbook Crashes.
I have installed the latest firmware and software for the dongle.
I have done the hardware diagnostic on the Macbook, everything is working and the dongle is working fine as I tested it another Macbook with Mavericks and it works.
I tried to reinstall Yosemite but my machine just hangs on black screen and won't reboot.
MacBook Pro 13" 16GB Memory, i7 2.9Ghz 750GB HDD

HI vojtabe,
What I did was, I uninstalled the Vodafone software completely first, then restarted the mac, then installed the Huawei driver and connected up the USB dongle and did not select to install the software and i just pushed the eject icon in finder and unplugged it, and it never crashed my machine after this.
Don't install the software as currently the Vodafone software only goes up to Mavericks.

Why does my macbook have the gray screen when it starts up?

my macbook pro has just started doing this - i keep it plugged in most of the time, and this has never been a problem for my previous macbook or before with this macbook until recently. every time i shut my laptop, and then open it later, it brings me to the gray screen with a white bar that loads pretty quickly, and then it brings me to my password login page. however, it takes a little longer for my mouse/cursor to be functional at this screen. any idea why this is happening? i have never had it do this before so i am not sure what is going on because i haven't been doing anything differently.

Have you read for possible solutions over in the "More Like This" thread over here?----------------------->

My MacBook Pro restarts (grey screen) when using hot corners.

I just updated to 10.8 from 10.6, and now, whenever I use Hot Corners, it goes to grey screen then restarts.
Any advice?

Now it is happening when I open Photo Booth. Here is the report to Apple:
Interval Since Last Panic Report: 71136 sec
Panics Since Last Report:          2
Anonymous UUID:                    32055E57-734D-0D0D-CBFF-DA1382947CDC
Fri Mar 1 10:08:03 2013
panic(cpu 2 caller 0xffffff7f93a19b25): NVRM[0/1:0:0]: Read Error 0x00000100: CFG 0xffffffff 0xffffffff 0xffffffff, BAR0 0xd2000000 0xffffff80b28ef000 0x0a5480a2, D0, P2/4
Backtrace (CPU 2), Frame : Return Address
0xffffff808f0cb260 : 0xffffff801321d626
0xffffff808f0cb2d0 : 0xffffff7f93a19b25
0xffffff808f0cb360 : 0xffffff7f93b134b3
0xffffff808f0cb3c0 : 0xffffff7f93b13527
0xffffff808f0cb430 : 0xffffff7f93e28853
0xffffff808f0cb570 : 0xffffff7f93b39659
0xffffff808f0cb5a0 : 0xffffff7f93a238da
0xffffff808f0cb650 : 0xffffff7f93a1efac
0xffffff808f0cb840 : 0xffffff7f93a20ade
0xffffff808f0cb920 : 0xffffff7f94c11ad5
0xffffff808f0cb960 : 0xffffff7f94c27507
0xffffff808f0cb980 : 0xffffff7f94c46353
0xffffff808f0cb9c0 : 0xffffff7f94c463b1
0xffffff808f0cba00 : 0xffffff7f94c2cc43
0xffffff808f0cba50 : 0xffffff7f94be70fc
0xffffff808f0cbae0 : 0xffffff7f94be2efa
0xffffff808f0cbb10 : 0xffffff7f94be0aab
0xffffff808f0cbb40 : 0xffffff80136650c3
0xffffff808f0cbbc0 : 0xffffff8013667153
0xffffff808f0cbc20 : 0xffffff8013664b8f
0xffffff808f0cbd70 : 0xffffff80132981e1
0xffffff808f0cbe80 : 0xffffff8013220aed
0xffffff808f0cbeb0 : 0xffffff8013210448
0xffffff808f0cbf00 : 0xffffff801321961b
0xffffff808f0cbf70 : 0xffffff80132a5b16
0xffffff808f0cbfb0 : 0xffffff80132ced53
      Kernel Extensions in backtrace:
         com.apple.NVDAResman(8.0)[A4C53A36-22B6-3075-82B9-9DE612A9C015]@0xffffff7f939b2 000->0xffffff7f93cb4fff
            dependency: com.apple.iokit.IOPCIFamily(2.7.2)[B1B77B26-7984-302F-BA8E-544DD3D75E73]@0xffff ff7f93778000
            dependency: com.apple.iokit.IONDRVSupport(2.3.5)[86DDB71C-A73A-3EBE-AC44-0BC9A38B9A44]@0xff ffff7f9399e000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3.5)[803496D0-ADAD-3ADB-B071-8A0A197DA53D]@0 xffffff7f9395b000
         com.apple.nvidia.nv50hal(8.0)[9F3D09B5-3158-3D9E-BDA3-E71576AAD3B7]@0xffffff7f9 3cc2000->0xffffff7f93fe4fff
            dependency: com.apple.NVDAResman(8.0.0)[A4C53A36-22B6-3075-82B9-9DE612A9C015]@0xffffff7f939 b2000
            dependency: com.apple.iokit.IOPCIFamily(2.7.2)[B1B77B26-7984-302F-BA8E-544DD3D75E73]@0xffff ff7f93778000
         com.apple.GeForce(8.0)[2E56ED9A-D848-3795-9E52-56BABDC9000C]@0xffffff7f94bc8000 ->0xffffff7f94c8afff
            dependency: com.apple.NVDAResman(8.0.0)[A4C53A36-22B6-3075-82B9-9DE612A9C015]@0xffffff7f939 b2000
            dependency: com.apple.iokit.IONDRVSupport(2.3.5)[86DDB71C-A73A-3EBE-AC44-0BC9A38B9A44]@0xff ffff7f9399e000
            dependency: com.apple.iokit.IOPCIFamily(2.7.2)[B1B77B26-7984-302F-BA8E-544DD3D75E73]@0xffff ff7f93778000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3.5)[803496D0-ADAD-3ADB-B071-8A0A197DA53D]@0 xffffff7f9395b000
BSD process name corresponding to current thread: WindowServer
Mac OS version:
12C60
Kernel version:
Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64
Kernel UUID: 69A5853F-375A-3EF4-9247-478FD0247333
Kernel slide:     0x0000000013000000
Kernel text base: 0xffffff8013200000
System model name: MacBookPro6,2 (Mac-F22586C8)
System uptime in nanoseconds: 27109689313040
last loaded kext at 24144518198561: com.apple.driver.AppleUSBAudio    2.9.0f6 (addr 0xffffff7f9574f000, size 262144)
last unloaded kext at 26701165971225: com.apple.driver.AppleUSBAudio    2.9.0f6 (addr 0xffffff7f9574f000, size 262144)
loaded kexts:
com.Cycling74.driver.Soundflower    1.6.2
at.obdev.nke.LittleSnitch    3908
com.apple.filesystems.autofs    3.0
com.apple.driver.AppleHWSensor    1.9.5d0
com.apple.iokit.IOBluetoothSerialManager    4.0.9f33
com.apple.driver.AudioAUUC    1.60
com.apple.driver.AGPM    100.12.69
com.apple.driver.AppleMikeyHIDDriver    122
com.apple.driver.AppleHDA    2.3.1f2
com.apple.driver.AppleMikeyDriver    2.3.1f2
com.apple.GeForce    8.0.0
com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport    4.0.9f33
com.apple.iokit.IOUserEthernet    1.0.0d1
com.apple.driver.ApplePolicyControl    3.2.11
com.apple.driver.SMCMotionSensor    3.0.2d6
com.apple.driver.AppleUpstreamUserClient    3.5.10
com.apple.driver.AppleIntelHDGraphics    8.0.0
com.apple.driver.AppleSMCPDRC    1.0.0
com.apple.driver.AppleLPC    1.6.0
com.apple.driver.AppleSMCLMU    2.0.2d0
com.apple.driver.AppleIntelHDGraphicsFB    8.0.0
com.apple.driver.ACPI_SMC_PlatformPlugin    1.0.0
com.apple.driver.AppleMuxControl    3.2.11
com.apple.driver.AppleMCCSControl    1.0.33
com.apple.driver.AppleUSBTCButtons    235.4
com.apple.driver.AppleIRController    320.15
com.apple.driver.AppleUSBTCKeyboard    235.4
com.apple.driver.AppleUSBCardReader    3.1.0
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless    1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib    1.0.0d1
com.apple.BootCache    34
com.apple.iokit.SCSITaskUserClient    3.5.1
com.apple.driver.XsanFilter    404
com.apple.iokit.IOAHCIBlockStorage    2.2.2
com.apple.driver.AppleFWOHCI    4.9.6
com.apple.driver.AirPort.Brcm4331    602.15.22
com.apple.driver.AppleAHCIPort    2.4.1
com.apple.driver.AppleUSBHub    5.2.5
com.apple.iokit.AppleBCM5701Ethernet    3.2.5b3
com.apple.driver.AppleUSBEHCI    5.4.0
com.apple.driver.AppleEFINVRAM    1.6.1
com.apple.driver.AppleSmartBatteryManager    161.0.0
com.apple.driver.AppleACPIButtons    1.6
com.apple.driver.AppleRTC    1.5
com.apple.driver.AppleHPET    1.7
com.apple.driver.AppleSMBIOS    1.9
com.apple.driver.AppleACPIEC    1.6
com.apple.driver.AppleAPIC    1.6
com.apple.driver.AppleIntelCPUPowerManagementClient    196.0.0
com.apple.nke.applicationfirewall    4.0.39
com.apple.security.quarantine    2
com.apple.driver.AppleIntelCPUPowerManagement    196.0.0
com.apple.kext.triggers    1.0
com.apple.iokit.IOSerialFamily    10.0.6
com.apple.driver.DspFuncLib    2.3.1f2
com.apple.iokit.IOAudioFamily    1.8.9fc10
com.apple.kext.OSvKernDSPLib    1.6
com.apple.iokit.AppleBluetoothHCIControllerUSBTransport    4.0.9f33
com.apple.iokit.IOSurface    86.0.3
com.apple.iokit.IOBluetoothFamily    4.0.9f33
com.apple.driver.AppleSMBusPCI    1.0.10d0
com.apple.iokit.IOFireWireIP    2.2.5
com.apple.nvidia.nv50hal    8.0.0
com.apple.NVDAResman    8.0.0
com.apple.driver.AppleHDAController    2.3.1f2
com.apple.iokit.IOHDAFamily    2.3.1f2
com.apple.driver.AppleSMC    3.1.4d2
com.apple.driver.IOPlatformPluginLegacy    1.0.0
com.apple.driver.IOPlatformPluginFamily    5.2.0d16
com.apple.driver.AppleGraphicsControl    3.2.11
com.apple.driver.AppleBacklightExpert    1.0.4
com.apple.iokit.IONDRVSupport    2.3.5
com.apple.driver.AppleSMBusController    1.0.10d0
com.apple.iokit.IOGraphicsFamily    2.3.5
com.apple.driver.AppleUSBMultitouch    235.7
com.apple.iokit.IOUSBHIDDriver    5.2.5
com.apple.iokit.IOSCSIBlockCommandsDevice    3.5.1
com.apple.iokit.IOUSBMassStorageClass    3.5.0
com.apple.driver.AppleUSBMergeNub    5.2.5
com.apple.driver.AppleUSBComposite    5.2.5
com.apple.iokit.IOSCSIMultimediaCommandsDevice    3.5.1
com.apple.iokit.IOBDStorageFamily    1.7
com.apple.iokit.IODVDStorageFamily    1.7.1
com.apple.iokit.IOCDStorageFamily    1.7.1
com.apple.iokit.IOAHCISerialATAPI    2.5.0
com.apple.iokit.IOSCSIArchitectureModelFamily    3.5.1
com.apple.iokit.IOFireWireFamily    4.5.5
com.apple.iokit.IO80211Family    500.15
com.apple.iokit.IOAHCIFamily    2.2.1
com.apple.iokit.IOUSBUserClient    5.2.5
com.apple.iokit.IOEthernetAVBController    1.0.2b1
com.apple.iokit.IONetworkingFamily    3.0
com.apple.iokit.IOUSBFamily    5.4.0
com.apple.driver.AppleEFIRuntime    1.6.1
com.apple.iokit.IOHIDFamily    1.8.0
com.apple.iokit.IOSMBusFamily    1.1
com.apple.security.sandbox    220
com.apple.kext.AppleMatch    1.0.0d1
com.apple.security.TMSafetyNet    7
com.apple.driver.DiskImages    344
com.apple.iokit.IOStorageFamily    1.8
com.apple.driver.AppleKeyStore    28.21
com.apple.driver.AppleACPIPlatform    1.6
com.apple.iokit.IOPCIFamily    2.7.2
com.apple.iokit.IOACPIFamily    1.4
com.apple.kec.corecrypto    1.0
Model: MacBookPro6,2, BootROM MBP61.0057.B0F, 2 processors, Intel Core i7, 2.8 GHz, 4 GB, SMC 1.58f17
Graphics: Intel HD Graphics, Intel HD Graphics, Built-In, 288 MB
Graphics: NVIDIA GeForce GT 330M, NVIDIA GeForce GT 330M, PCIe, 512 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1067 MHz, 0x802C, 0x384A53463235363634485A2D314731443120
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1067 MHz, 0x802C, 0x384A53463235363634485A2D314731443120
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x93), Broadcom BCM43xx 1.0 (5.106.98.81.22)
Bluetooth: Version 4.0.9f33 10885, 2 service, 11 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: ST9500420ASG, 500.11 GB
Serial ATA Device: MATSHITADVD-R   UJ-898
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfa100000 / 2
USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0xfa130000 / 5
USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0236, 0xfa120000 / 4
USB Device: BRCM2070 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 3
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8218, 0xfa113000 / 8
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfd100000 / 2
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd120000 / 4
USB Device: Built-in iSight, apple_vendor_id, 0x8507, 0xfd110000 / 3

Blank screen when notebook starts

Hi,
My computer boots normally when I switch it on but the screen is blank at the password entering screen. I have to re-boot it again several time to have the screen on. I noticed if I unplug the mains connector from the laptop, plug it again, sometimes the display works again!
As a workaround, should I choose Hibernate instead of Switch off?
WIndows 7 64 bits
Thank you.

This sounds like it may be due to hardware failure. I'd suggest contacting customer support at (800) 457-7777.
- Peter

I have installed call of juarez 1 in my macbook pr o13 inch but when i started the game my screen was rotated and became small what can i do for this problem?

i have installed call of juarez 1 on my macbook pro 13 inch but when i started the game my screen in the game was rotated and became samll in the right-up of the led how can i fix this problem ?
please help i really love to play this game!

yes they checked it out on their macbook pro 15 inch and everything was ok
game lunched normally.

My MacBook Pro shows the logo in a white screen when I ask for a Software Update under the apple. Actually it stays blank on Featured, Top Charts, Categories and Purchases as well. What up? Thanks.

My MacBook Pro shows the logo in a white screen when I ask for a Software Update under the apple. Actually it stays blank on Featured, Top Charts, Categories and Purchases as well. What up? Thanks.

I am having exactly the same problem right now. After some research, it looked like my HD was toast. I replaced it today, that part was easy, but now I cannot seem to use my original Install Disk to format the new HD. I get a grey restart screen, or if I get to the Language Selection screen, my cursor is frozen in left corner and I can't use it.
Very frustrating, hope someone else has some ideas!
PS My MacBook was about same age, and "expired" in exactly the same way as yours.

My MacBook Pro shows a grey screen at start-up how do I fix this problem?

My MacBook Pro shows a grey screen when I try to login and won't go onto my homepage. Why has this happened and how do I fix it?

Take each of these steps that you haven't already tried. Stop when the problem is resolved.
Step 1
The first step in dealing with a startup failure is to secure the data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since the last backup, you can skip this step.
There are several ways to back up a Mac that is unable to start. You need an external hard drive to hold the backup data.
a. Start up from the Recovery partition, or from a local Time Machine backup volume (option key at startup.) When the OS X Utilities screen appears, launch Disk Utility and follow the instructions in this support article, under “Instructions for backing up to an external hard disk via Disk Utility.” The article refers to starting up from a DVD, but the procedure in Recovery mode is the same. You don't need a DVD if you're running OS X 10.7 or later.
b. If Step 1a fails because of disk errors, and no other Mac is available, then you may be able to salvage some of your files by copying them in the Finder. If you already have an external drive with OS X installed, start up from it. Otherwise, if you have Internet access, follow the instructions on this page to prepare the external drive and install OS X on it. You'll use the Recovery installer, rather than downloading it from the App Store.
c. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, start the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
d. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.
Step 2
If the startup process stops at a blank gray screen with no Apple logo or spinning "daisy wheel," then the startup volume may be full. If you had previously seen warnings of low disk space, this is almost certainly the case. You might be able to start up in safe mode even though you can't start up normally. Otherwise, start up from an external drive, or else use the technique in Step 1b, 1c, or 1d to mount the internal drive and delete some files. According to Apple documentation, you need at least 9 GB of available space on the startup volume (as shown in the Finder Info window) for normal operation.
Step 3
Sometimes a startup failure can be resolved by resetting the NVRAM.
Step 4
If you use a wireless keyboard, trackpad, or mouse, replace or recharge the batteries. The battery level shown in the Bluetooth menu item may not be accurate.
Step 5
If there's a built-in optical drive, a disc may be stuck in it. Follow these instructions to eject it.
Step 6
Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to start up, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can start up now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.
Step 7
If you've started from an external storage device, make sure that the internal startup volume is selected in the Startup Disk pane of System Preferences.
Start up in safe mode. Note: If FileVault is enabled, or if a firmware password is set, or if the startup volume is a software RAID, you can’t do this. Post for further instructions.
Safe mode is much slower to start and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
The login screen appears even if you usually log in automatically. You must know the login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
When you start up in safe mode, it's normal to see a dark gray progress bar on a light gray background. If the progress bar gets stuck for more than a few minutes, or if the system shuts down automatically while the progress bar is displayed, the startup volume is corrupt and the drive is probably malfunctioning. In that case, go to Step 11. If you ever have another problem with the drive, replace it immediately.
If you can start and log in in safe mode, empty the Trash, and then open the Finder Info window on the startup volume ("Macintosh HD," unless you gave it a different name.) Check that you have at least 9 GB of available space, as shown in the window. If you don't, copy as many files as necessary to another volume (not another folder on the same volume) and delete the originals. Deletion isn't complete until you empty the Trash again. Do this until the available space is more than 9 GB. Then restart as usual (i.e., not in safe mode.)
If the startup process hangs again, the problem is likely caused by a third-party system modification that you installed. Post for further instructions.
Step 8
Launch Disk Utility in Recovery mode (see Step 1.) Select the startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.
This is one of the rare situations in which you should also run Repair Permissions, ignoring the false warnings it may produce. Look for the line "Permissions repair complete" at the end of the output. Then restart as usual.
Step 9
If the startup device is an aftermarket SSD, it may need a firmware update and/or a forced "garbage collection." Instructions for doing this with a Crucial-branded SSD were posted here. Some of those instructions may apply to other brands of SSD, but you should check with the vendor's tech support.
Step 10
Reinstall the OS. If the Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
Step 11
Do as in Step 9, but this time erase the startup volume in Disk Utility before installing. The system should automatically restart into the Setup Assistant. Follow the prompts to transfer the data from a Time Machine or other backup.
Step 12
This step applies only to models that have a logic-board ("PRAM") battery: all Mac Pro's and some others (not current models.) Both desktop and portable Macs used to have such a battery. The logic-board battery, if there is one, is separate from the main battery of a portable. A dead logic-board battery can cause a startup failure. Typically the failure will be preceded by loss of the settings for the startup disk and system clock. See the user manual for replacement instructions. You may have to take the machine to a service provider to have the battery replaced.
Step 13
If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.

When I turn on my iphone4s, the apple logo will show for a few seconds, and it will suddenly fade off to a blank screen, and not start up. It will then restart by itself, and the cycle repeats. Any suggestions on how I can troubleshoot this problem?

Hi all,
I need help with my iphone4s.
When I turn on my iphone4s, the apple logo will show for a few seconds, and it will suddenly fade off to a blank screen, and not start up. It will then restart by itself, and the cycle repeats. Any suggestions on how I can troubleshoot this problem?
What seems to be the problem here?
thanks and regards
Wan

Wanlucg wrote:
When I turn on my iphone4s, the apple logo will show for a few seconds, and it will suddenly fade off to a blank screen, and not start up. It will then restart by itself, and the cycle repeats.
Make sure you have the Current Version of iTunes Installed on your computer
iTunes free download from www.itunes.com/download
Then See Here > http://support.apple.com/kb/HT1808
You may need to try this More than Once... Be sure to Follow ALL the Steps...
Take your time... Pay particular attention to Steps 3 and 4.
After you have Recovered your Device...
Re-Sync your Content or Restore from the most recent Backup...
Restore from Backup > http://support.apple.com/kb/ht1766

My macbook pro shows blank screen when I started..help me..

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