My computer keeps blacking out

I have posted a topic like this a while ago, but it started again. When I'm on the computer, say playing WoW, all of a sudden the screen will turn black and the power light flashes on and off. My computer fan was a problem of Apples and it was in the right number group or whatever so I got the part for free I guess and they put it in and it worked for a couple months but now it's been having the same problem.. and alot. This morning I woke up and went to play WoW and within 10 minutes of play time the screen just turned off. We're sending it in again but I'm worried the same thing will happen after it's fixed again. Is there any way I can clean the fan out myself? They said there was a lot of dust inside it when they cleaned it is there a way I could remove that dust in my home? Thanks in advance for any help you can give me.

As long as you don't have an iSight, you can open the case and vacuum out the dust. However, it should not have gotten dusty enough to stop working a just a couple of months unless you live in the middle of a dust bowl. I suspect that what you have is really a power supply problem and since it is less than three months since your repair, I advise you to call Apple immediately and tell them what's happening. If they replaced your power supply last time, probably along with the logicboard, you might have gotten a faulty replacement.
Do call them now and see what they can do for you.
Please post back with results,
Miriam

Similar Messages

The built in screen in my Macbook keeps blacking out, even though the computer is on.

Hi
The internal screen on my Macbook keeps blacking out; when this happens the computer is still on - just no screen. This happens when unplugged after a few seconds, and takes a bit longer when plugged in.
If I close the lid and open it again the screen works again for a few seconds before the blackout returns. Obviously this is not the ideal work scenario!
It does not appear that this is a backlight issue (I presume) as I cannot see any image on the screen when this happens from any angle.
If I turn the brightness all the way down and then back up again the screen flicks on for a fraction of a second before anything happens again.
Any ideas what might be causing this? If I can fix it? And/or how much an Apple repair of the problem is likely to cost.
Many thanks for your help!
Martin Faint

Unfortunately it sounds like the logic board... happened on a MB I have at work. That's an Apple Store replacement, and can be expensive if your mac's out of warranty. Free if it's still covered...

MacBook Pro i7 keeps blacking out

My MacBook Pro keeps blacking out. The screen and the external monitor goes black. Keyboard on macbook pro still lighted up. And have to force a restart.
below is the report, as Im not a techie Im not sure what to make of it.
Would appreciate it if anyone can make some sense as to why this is happening to my mac. Thanks!
Interval Since Last Panic Report: 13795 sec
Panics Since Last Report:          2
Anonymous UUID:                    604E1295-6F3C-45FC-8EDB-D907A544CE35
Sun Jul 8 19:02:57 2012
panic(cpu 3 caller 0x9d4c97): NVRM[0/1:0:0]: Read Error 0x00000100: CFG 0xffffffff 0xffffffff 0xffffffff, BAR0 0xc0000000 0x7fc00000 0x0a5480a2, D0, P2/4
Backtrace (CPU 3), Frame : Return Address (4 potential args on stack)
0x5d049c38 : 0x21b837 (0x5dd7fc 0x5d049c6c 0x223ce1 0x0)
0x5d049c88 : 0x9d4c97 (0xbea22c 0xc5a840 0xbf8f88 0x0)
0x5d049d28 : 0xaef5db (0x8f54c04 0x9bae004 0x100 0x42032000)
0x5d049d78 : 0xae65d4 (0x9bae004 0x100 0x5d049da8 0x9c4774)
0x5d049da8 : 0x175e965 (0x9bae004 0x100 0x438004ee 0x1)
0x5d049ee8 : 0xb0e258 (0x9bae004 0x9d54004 0x0 0x0)
0x5d049f28 : 0x9dde2b (0x9bae004 0x9d54004 0x0 0x0)
0x5d049fc8 : 0x9da50a (0x0 0x9 0x0 0x0)
0x5d04a178 : 0x9dc696 (0x0 0x600d600d 0x7027 0x5d04a1a8)
0x5d04a248 : 0xc8610d (0xc1d00043 0xbeef0003 0xd4a4280 0x71)
0x5d04a2e8 : 0xc86685 (0x4630a000 0xd4a4280 0xd4ac004 0x0)
0x5d04a328 : 0xc5dec3 (0x4630a000 0xd4a4280 0xd4ac004 0x0)
0x5d04a358 : 0xc85cba (0x4630a000 0xd4a4280 0xd4ac004 0x0)
0x5d04a378 : 0xc5d418 (0x4630a000 0xd4a4280 0xd4ac004 0x0)
0x5d04a398 : 0xc86630 (0x4630a000 0xd4ac000 0x2 0x2)
0x5d04a3d8 : 0xc60905 (0x4630a000 0xd4ac000 0x0 0xd4b0800)
0x5d04a418 : 0xc5e325 (0x4630a000 0x465f3000 0x46649000 0xd1a9b80)
0x5d04a468 : 0xcb14e9 (0x4630a000 0x465f3000 0x46649000 0xd1a9b80)
0x5d04a4f8 : 0xca2c9b (0xd1a9b80 0xd4b0800 0x0 0x1)
0x5d04a558 : 0xca2f02 (0x465f3000 0x465f3788 0xd4b0800 0x0)
0x5d04a5a8 : 0xca33d6 (0x465f3000 0x465f3788 0x5d04a8cc 0x5d04a86c)
0x5d04a8e8 : 0xca01a1 (0x465f3000 0x465f3788 0x1 0x2209aa)
0x5d04a908 : 0xc6788f (0x465f3000 0x465f3788 0xd4b2a40 0x507617)
0x5d04a938 : 0xca1c64 (0x465f3000 0x5d04aa7c 0x5d04a968 0x465f3000)
0x5d04a978 : 0xc6bc93 (0x465f3000 0x5d04aa7c 0x5d04aa7c 0x5d04a9e0)
0x5d04aab8 : 0xca55d8 (0x465f3000 0x1 0x5d04abcc 0x5d04abc8)
0x5d04ab68 : 0xc67fe1 (0x465f3000 0x1 0x5d04abcc 0x5d04abc8)
0x5d04abe8 : 0x56da06 (0x465f3000 0x0 0x5d04ae3c 0x5d04ac74)
0x5d04ac38 : 0x56e2a5 (0xcf6720 0x465f3000 0xae4d088 0x1)
0x5d04ac88 : 0x56eb59 (0x465f3000 0x10 0x5d04acd0 0x0)
0x5d04ada8 : 0x286638 (0x465f3000 0x10 0xae4d088 0x1)
0x5d04be58 : 0x21dbe5 (0xae4d060 0xd4025a0 0x1e6838 0x13d5f)
0x5d04be98 : 0x210a86 (0xae4d000 0x0 0xd17baf0 0xd1445b0)
0x5d04bef8 : 0x216f84 (0xae4d000 0x0 0x0 0x0)
0x5d04bf78 : 0x295c57 (0xa410288 0x0 0x0 0x0)
0x5d04bfc8 : 0x2a256d (0xa410284 0x1 0x10 0xa413884)
      Kernel Extensions in backtrace (with dependencies):
         com.apple.GeForce(6.3.6)@0xc5c000->0xd12fff
            dependency: com.apple.NVDAResman(6.3.6)@0x96e000
            dependency: com.apple.iokit.IONDRVSupport(2.2)@0x961000
            dependency: com.apple.iokit.IOPCIFamily(2.6.5)@0x928000
            dependency: com.apple.iokit.IOGraphicsFamily(2.2)@0x93f000
         com.apple.nvidia.nv50hal(6.3.6)@0x1628000->0x1a3cfff
            dependency: com.apple.NVDAResman(6.3.6)@0x96e000
         com.apple.NVDAResman(6.3.6)@0x96e000->0xc5bfff
            dependency: com.apple.iokit.IOPCIFamily(2.6.5)@0x928000
            dependency: com.apple.iokit.IONDRVSupport(2.2)@0x961000
            dependency: com.apple.iokit.IOGraphicsFamily(2.2)@0x93f000
BSD process name corresponding to current thread: Safari
Mac OS version:
10K549
Kernel version:
Darwin Kernel Version 10.8.0: Tue Jun 7 16:33:36 PDT 2011; root:xnu-1504.15.3~1/RELEASE_I386
System model name: MacBookPro6,2 (Mac-F22586C8)
System uptime in nanoseconds: 3068068611521
unloaded kexts:
com.apple.driver.AppleUSBUHCI          4.2.0 (addr 0x1463000, size 0x65536) - last unloaded 115810966300
loaded kexts:
com.apple.driver.AppleHWSensor          1.9.3d0 - last loaded 26681814424
com.apple.filesystems.autofs          2.1.0
com.apple.driver.AGPM          100.12.31
com.apple.driver.AppleMikeyHIDDriver          1.2.0
com.apple.driver.AppleHDA          2.0.5f14
com.apple.driver.AppleMikeyDriver          2.0.5f14
com.apple.driver.AudioAUUC          1.57
com.apple.driver.AppleUpstreamUserClient          3.5.7
com.apple.driver.AppleMCCSControl          1.0.20
com.apple.driver.SMCMotionSensor          3.0.1d2
com.apple.filesystems.ntfs          3.4
com.apple.driver.AppleUSBOpticalMouse          3.7.5
com.apple.driver.AppleIntelHDGraphics          6.3.6
com.apple.driver.AppleIntelHDGraphicsFB          6.3.6
com.apple.Dont_Steal_Mac_OS_X          7.0.0
com.apple.driver.AudioIPCDriver          1.1.6
com.apple.driver.ACPI_SMC_PlatformPlugin          4.7.0a1
com.apple.GeForce          6.3.6
com.apple.driver.AppleLPC          1.5.1
com.apple.driver.AppleGraphicsControl          2.10.6
com.apple.kext.AppleSMCLMU          1.5.2d10
com.apple.driver.AppleUSBTCButtons          201.6
com.apple.driver.AppleUSBTCKeyboard          201.6
com.apple.driver.AppleUSBCardReader          2.6.1
com.apple.driver.AppleIRController          303.8
com.apple.BootCache          31.1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
com.apple.iokit.SCSITaskUserClient          2.6.8
com.apple.iokit.IOAHCIBlockStorage          1.6.4
com.apple.driver.AppleUSBHub          4.2.4
com.apple.driver.AppleFWOHCI          4.7.3
com.apple.driver.AirPortBrcm43224          428.42.4
com.apple.driver.AppleEFINVRAM          1.4.0
com.apple.driver.AppleAHCIPort          2.1.7
com.apple.iokit.AppleBCM5701Ethernet          3.0.5b8
com.apple.driver.AppleUSBEHCI          4.2.4
com.apple.driver.AppleACPIButtons          1.3.6
com.apple.driver.AppleSmartBatteryManager          160.0.0
com.apple.driver.AppleRTC          1.3.1
com.apple.driver.AppleHPET          1.5
com.apple.driver.AppleSMBIOS          1.7
com.apple.driver.AppleACPIEC          1.3.6
com.apple.driver.AppleAPIC          1.4
com.apple.driver.AppleIntelCPUPowerManagementClient          142.6.0
com.apple.security.sandbox          1
com.apple.security.quarantine          0
com.apple.nke.applicationfirewall          2.1.12
com.apple.driver.AppleIntelCPUPowerManagement          142.6.0
com.apple.driver.DspFuncLib          2.0.5f14
com.apple.driver.AppleProfileReadCounterAction          17
com.apple.driver.AppleProfileTimestampAction          10
com.apple.driver.AppleProfileThreadInfoAction          14
com.apple.driver.AppleProfileRegisterStateAction          10
com.apple.driver.AppleProfileKEventAction          10
com.apple.driver.AppleProfileCallstackAction          20
com.apple.driver.AppleSMBusController          1.0.10d0
com.apple.iokit.IOFireWireIP          2.0.3
com.apple.driver.AppleUSBAudio          2.7.6f6
com.apple.iokit.IOSurface          74.2
com.apple.iokit.IOBluetoothSerialManager          2.4.5f3
com.apple.iokit.IOSerialFamily          10.0.3
com.apple.iokit.IOAudioFamily          1.8.3fc2
com.apple.kext.OSvKernDSPLib          1.3
com.apple.driver.AppleHDAController          2.0.5f14
com.apple.iokit.IOHDAFamily          2.0.5f14
com.apple.iokit.AppleProfileFamily          41
com.apple.driver.IOPlatformPluginFamily          4.7.0a1
com.apple.driver.AppleSMBusPCI          1.0.10d0
com.apple.driver.AppleBacklightExpert          1.0.1
com.apple.driver.AppleSMC          3.1.0d5
com.apple.nvidia.nv50hal          6.3.6
com.apple.NVDAResman          6.3.6
com.apple.iokit.IONDRVSupport          2.2
com.apple.iokit.IOGraphicsFamily          2.2
com.apple.driver.AppleUSBHIDKeyboard          141.5
com.apple.driver.AppleHIDKeyboard          141.5
com.apple.driver.BroadcomUSBBluetoothHCIController          2.4.5f3
com.apple.driver.AppleUSBBluetoothHCIController          2.4.5f3
com.apple.iokit.IOBluetoothFamily          2.4.5f3
com.apple.driver.AppleUSBMultitouch          207.7
com.apple.iokit.IOSCSIBlockCommandsDevice          2.6.8
com.apple.iokit.IOUSBMassStorageClass          2.6.7
com.apple.iokit.IOUSBHIDDriver          4.2.0
com.apple.driver.AppleUSBMergeNub          4.2.4
com.apple.driver.AppleUSBComposite          3.9.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice          2.6.8
com.apple.iokit.IOBDStorageFamily          1.6
com.apple.iokit.IODVDStorageFamily          1.6
com.apple.iokit.IOCDStorageFamily          1.6.1
com.apple.driver.XsanFilter          402.1
com.apple.iokit.IOAHCISerialATAPI          1.2.6
com.apple.iokit.IOSCSIArchitectureModelFamily          2.6.8
com.apple.iokit.IOUSBUserClient          4.2.4
com.apple.iokit.IOFireWireFamily          4.2.6
com.apple.iokit.IO80211Family          320.1
com.apple.iokit.IOAHCIFamily          2.0.6
com.apple.iokit.IONetworkingFamily          1.10
com.apple.iokit.IOUSBFamily          4.2.4
com.apple.driver.AppleEFIRuntime          1.4.0
com.apple.iokit.IOHIDFamily          1.6.6
com.apple.iokit.IOSMBusFamily          1.1
com.apple.kext.AppleMatch          1.0.0d1
com.apple.security.TMSafetyNet          6
com.apple.driver.DiskImages          289
com.apple.iokit.IOStorageFamily          1.6.3
com.apple.driver.AppleACPIPlatform          1.3.6
com.apple.iokit.IOPCIFamily          2.6.5
com.apple.iokit.IOACPIFamily          1.3.0
Model: MacBookPro6,2, BootROM MBP61.0057.B0C, 2 processors, Intel Core i7, 2.66 GHz, 4 GB, SMC 1.58f15
Graphics: NVIDIA GeForce GT 330M, NVIDIA GeForce GT 330M, PCIe, 512 MB
Graphics: Intel HD Graphics, Intel HD Graphics, Built-In, 288 MB
Memory Module: global_name
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x93), Broadcom BCM43xx 1.0 (5.10.131.42.4)
Bluetooth: Version 2.4.5f3, 2 service, 12 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: Hitachi HTS545050B9SA02, 465.76 GB
Serial ATA Device: MATSHITADVD-R   UJ-898
USB Device: Hub, 0x0424 (SMSC), 0x2514, 0xfa100000 / 2
USB Device: Internal Memory Card Reader, 0x05ac (Apple Inc.), 0x8403, 0xfa130000 / 5
USB Device: BRCM2070 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 4
USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x8218, 0xfa113000 / 7
USB Device: Apple Internal Keyboard / Trackpad, 0x05ac (Apple Inc.), 0x0236, 0xfa120000 / 3
USB Device: Hub, 0x0424 (SMSC), 0x2514, 0xfd100000 / 2
USB Device: Hub, 0x050d (Belkin Corporation), 0x0307, 0xfd130000 / 5
USB Device: Keyboard Hub, 0x05ac (Apple Inc.), 0x1006, 0xfd131000 / 8
USB Device: Apple Optical USB Mouse, 0x05ac (Apple Inc.), 0x0307, 0xfd131300 / 10
USB Device: Apple Keyboard, 0x05ac (Apple Inc.), 0x0220, 0xfd131200 / 9
USB Device: Akai MPD32, 0x09e8 (AKAI professional M.I. Corp.), 0x006c, 0xfd135000 / 7
USB Device: ReMOTE SL Compact, 0x1235, 0x0008, 0xfd136000 / 6
USB Device: Built-in iSight, 0x05ac (Apple Inc.), 0x8507, 0xfd110000 / 4
USB Device: IR Receiver, 0x05ac (Apple Inc.), 0x8242, 0xfd120000 / 3

What FOB are you on? I'm trying to figure out if this is a local problem or theater wide issue. Another one of my Mac using co-workers is having the same problem.
I actually got some messages in Console this time;
1/6/10 9:36:45 AM ntpd[962] sendto(17.82.253.7) (fd=25): Network is unreachable
1/6/10 9:49:34 AM Skype[1851] Automatic update check at Skype website failed
1/6/10 10:19:53 AM configd[13] DHCP en0: RENEW/REBIND transmit failed
1/6/10 12:19:23 PM configd[13] DHCP en0: RENEW/REBIND transmit failed
1/6/10 12:39:20 PM loginwindow[29] in pamsmauthenticate(): Failed to determine Kerberos principal name.
1/6/10 12:39:35 PM configd[13] DHCP en0: RELEASE transmit failed
1/6/10 12:39:35 PM configd[13] IPMonitor applyipv4route failed to remove 10.5.48.1/32 route, No such process:
Message was edited by: Rickitytick

I touch keeps blacking out, camera wont change views either

when we hit an icon it keeps blacking out or returning to main page... camera wont change views either

Try #2 and #3 in link below. If neither work, you most likely have a hardware issue.
Basic troubleshooting steps
17" 2.2GHz i7 Quad-Core MacBook Pro  8G RAM  750G HD + OCZ Vertex 3 SSD Boot HD 
Got problems with your Apple iDevice-like iPhone, iPad or iPod touch? Try Troubleshooting 101
 In Memory of Steve Jobs 

My macbook pro keeps blacking out

My 13" macbook pro keeps blacking out when I'm using it and the only thing on my screen is the cursor, could you please tell me how to resolve this problem?

Go step by step and test.
1. Reset SMC.     http://support.apple.com/kb/HT3964
    Choose the method for:
    "Resetting SMC on portables with a battery you should not remove on your own"
2. Reset PRAM. http://support.apple.com/kb/PH4405
3. http://support.apple.com/kb/PH13977
Best.

My macbook air keeps blacking out/ it comes back on in a few seconds but music etc stops.

My macbook air w yosemite keeps blacking out. no pattern. i push a key and it comes back on after a few seconds. Music stops. Now happening more often. Has this happened to others? advice welcome.

Reset PRAM. http://support.apple.com/kb/PH18761
Reset SMC. http://support.apple.com/kb/HT3964
Choose the method for:
"Resetting SMC on portables with a battery you should not remove on your own".
Best.

HT4623 My IPad keeps blacking out constantly. Any suggestions??

My iPad keeps blacking out constantly. what's wrong, any suggestions?

McHi76 wrote:
My iPad keeps blacking out...
The Basic Troubleshooting Steps are:
Restart... Reset... Restore from Backup... Restore as New...
Restart... Reset > http://support.apple.com/kb/ht1430
Restore from Backup... Restore as New > http://support.apple.com/kb/HT1414
If you try all these steps and you still have issues... Then a Visit to an Apple Store or AASP (Authorized Apple Service Provider) is the Next Step...
Be sure to make an appointment first...

Since installing yosemite my computer/screen blacks out, but still running

Since installing yosemite last week, my computer/screen blacks out, but still running. I have since rebooted everything, started from scratch and utilizing my external drive transferred all files/apps back. Did not help, in fact it is getting worse. Computer screen blacks out every 5 min or so and have to power up again. Also, continue to get Java message updates even after all have been updated over and over again. Any suggestions? Thanks!

Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, by a peripheral device, by a font conflict, or by corruption of the file system or of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards, if applicable. Start up in safe mode and log in to the account with the problem. You must hold down the shift key twice: once when you turn on the computer, and again when you log in.
Note: If FileVault is enabled in OS X 10.9 or earlier, or if a firmware password is set, or if the startup volume is a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to start up and run than normal, with limited graphics performance, and some things won’t work at all, including sound output and Wi-Fi on certain models. The next normal startup may also be somewhat slow.
The login screen appears even if you usually login automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. Same problem?
After testing, restart as usual (not in safe mode) and verify that you still have the problem. Post the results of the test.

MacBook keeps blacking out for a few seconds

I have a weird new problem. It started blacking out (I thought it had switched itself off but it hasn't, it comes right back as it was after a few seconds) around every half hour or so. But now, just a few days after the problem began, it is blacking out every few minutes. Luckily it comes right back on and I don't lose anything, but it is annoying and certainly not right! Any ideas what this could be related to and how to fix it?

It sounds like it is either the inverter cable or the inverter board. Probably the latter. You can find repair guides, parts, and tools on ifixit.com. If your computer is under warranty, take it to an Apple store and have them fix it.

HT1212 i am attempting to restore an i pad mini but computer keeps timing out of network connection how can i fix

Im attempting to restore ipad mini but itunes site keeps timing out how do i fix

If you are doing it via your computer's iTunes then try temporarily turning off all your firewall and antivirus software on your computer until the download/restore has completed.

Docking Station Screen keeps blacking out

So up until now, I've had no problem with the screen showing Time/charging status/Temperature when I dock the phone. But yesterday the screen blacked out (okay, dark grayed out) and I don't know how to keep it from doing that...any hints? Thanks

Okay...never mind. New to this forum, and didn't bother to check the "solutions" list. Found my answer there (brightness icon--that I couldn't see cause the screen was VERY gray). Hope everyones questions are as easy to answer as mine was!!

Why does my computer screen black out

Re: Forums
I'm using an Hp Pavilion Slim Line s5260f desk top pc. I have posted this thread several weeks ago. It seems that I loose my screen on occassion while I am operating my computer. When this happenes the computer blacks out and my screen turns into a very dark shade of blue almost black. Having to force shut down the computer to turn it on again. In the past I have changed my monitor which worked for a while. Another time a short while ago when this happened I unpluged the power chord and the chord going from my monitor to my tower and plugged them in again which worked for a while It has blacked out again. I am asking if anyone has an idea of why this happens on occasion so I can try to address this issue be it now or the next time it happens. I am also hoping that I have posted this question in the proper catogory in the Hp forum. Thank you Jerry.

JrJerry,
Is this the Nvidia driver update that failed to install? It should install.
Working on instructions for event viewer (event viewer may be a dead end) but could you send a screenshot of Device Manager?
Go to Control Panel - Device Manager. Then use Microsoft's snipping tool.
It should look like this ( image ).
I am interested in the display adapter. This image is an example of a system with no device errors.
Please open an admin command prompt. Then enter this command: sfc /scannow
One last thought, roughly when did you purchase your system and when did this problem start? If the system was fine until recently and the Nvidia drivers (software) are corrupted then a restore should correct the problem. I would only suggest this course of action after all else fails, especially not being able to update the Nvidia drivers. If the problems remains after a restore then it is hardware or heat related.
We may have to restore the system back the factory image. Did you create an HP Recovery Disk set?
Make sure you back up all important data as a system recovery will reformat your harddrive and, in the process, erase all data and programs you have installed since you purchased the computer.
If we can't solve this problem maybe one or more of the other very knowledgeable forum members can assist.
One last point, in an earlier reply I had suggested you try DVI if currently using VGA and vice versa. This was suggested to eliminate a possible flakey input-output vga or dvi port connection to the mainboard. This would indicate a mainboard failure. The only solution would be to replace the mainboard with the same type (correctly tatooed HP) mainboard. It may be cheaper to replace the system if this is the case.
Jaco
Errare humanum est.

My phone keeps blacking out iphone 4s

Been having problem with iphone 4 s blacking out. I was late to work several days cause my alarm clock did not go off. once it goes black it is really hard getting it back on. luckily it has always come back on so far. any advice would be appreciated.

Hey saifulislamperish,
Thanks for the question. I understand that you are experiencing power issues with your iPhone 4s. To completely isolate the issue, you may want to follow these steps:
Will not turn on, will not turn on unless connected to power, or unexpected power off
1. Verify that the Sleep/Wake button functions. If it does not function, inspect it for signs of damage. If the button is damaged or is not functioning when pressed, seek service.
2. Check if a Liquid Contact Indicator (LCI) is activated or there are signs of corrosion.
Learn about LCIs and corrosion.
3. Connect the iPhone to the iPhone's USB power adapter and let it charge for at least ten minutes.
4. After at least 15 minutes, if:
               - The home screen appears: The iPhone should be working. Update to the latest version of iOS if necessary. Continue charging it until it is completely charged and you see this battery icon in the upper-right corner of the screen. Then unplug the phone from power. If it immediately turns off, seek service.
               - The low-battery image appears, even after the phone has charged for at least 20 minutes: See "iPhone displays the low-battery image and is unresponsive" symptom in this article.
               - Something other than the Home screen or Low Battery image appears, continue with this article for further troubleshooting steps.
5. If the iPhone did not turn on, reset it while connected to the iPhone USB power adapter.
               - If the display turns on, go to step 4.
               - If the display remains black, go to next step.
6. Connect the iPhone to a computer and open iTunes. If iTunes recognizes the iPhone and indicates that it is in recovery mode, attempt to restore the iPhone. If the iPhone doesn't appear in iTunes or if you have difficulties in restoring the iPhone, see this article for further assistance.
7. If restoring the iPhone resolved the issue, go to step 4. If restoring the iPhone did not solve the issue, seek service.
My issue is still not resolved. What do I do next?
Contact Apple Support.
For additional information, see this article:
iPhone: Hardware troubleshooting
http://support.apple.com/kb/TS2802
Thanks,
Matt M.

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