Toshiba M55-S139 Laptop randomly freezes without warning.
- Machine ramdomly freezes while running or while booting. Usually a few minutes after boot.
- When the machine freezes, the screen remains frozen (does not go black), the mouse activity is frozen, the computer is still powered on.
- Pressing the on/off butter triggers an instantaneous reboot.
- Having the exact same symptoms on a Satellite M40 (PSM40U-11U048)
- The freeze happens suddenly, without warning or visible artifacts on screen.
- While running XP, I would get the mouse freeze and a single beep at the same time.
- As soon as the machine freezes, the HDD becomes idle.
- Not OS related. Happens with XP and Unbuntu.
- Not memory related. Changed the memory banks with new ones. symptoms persist.
- Not HDD related either.
- Does not appear to be CPU related. Temperature seems normal. No apparent overheating.
- Tried reseting the bios settings to default with no effect.
I suspect a problem with the motherboard, possibly a false contact somewhere on the board, possibly something related to the chipset.
Any idea what is going on? Having 2 toshiba laptops with the same problem, I would assume this issue is widespread. Any idea how I could narrow the issue would be helpful too. Finaly in the event I need to replace the motherboard, do you know where I could order one?
Ok this may be a multistep process to verify for sure that the board is bad before we replace it then I will help you find one, just bear with me. Usually freezing does have to do with overheating, but as you said, you checked that. Do you mind telling me what you are using to monitor the temps, just curious.
I have to sart asking the basics then we can look into the hardware. Have you done a disk cleanup? disk defrag? check disk utility? have you run any security software? which one? in safe mode? If yes to these, we should move on to the hardware, let me know.
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If unit never enters the freeze cycle, usually it is a stuck flow which located in the front of the machine. White plastic with a black rubber boot on the bottom. May need cleaning or replacing. You have to drain water out of machine prior to removal.
Do any lights come on when you press the power button? If not, did you get all the cables reconnected properly? If lights come on or fans come on when you press the power button, then it sounds like the screen has gone bad. That is the symptoms you are describing.
The computer can't find the operating system. It could be a sign of your hard drive failing.
I'd suggest booting up the machine while holding the 'option' key and selecting your startup disc,
if that doesn't work, insert the OS installation disc and hold either 'option' to select the startup disc or hold 'c' which will boot directly from the DVD.
Running disc utility and repairing the permissions and verifying the disc MIGHT solve the issue. However usually when the machine can't find the OS it is a sign of hard drive failure.
A question mark on the boot screen is an indication that the machine can't find your boot drive. Usually this is trivially fixed by resetting the PRAM (holding down command-option-P-R after turning on the machine with the power button, until you hear the chime three times).
However, taken in conjunction with your other symptom, I would suspect a failing drive or a failing SATA channel (less probable). Does it boot from the original DVD without these symptoms? After booting from the DVD, are there any indications from the tools that the hard drive may not be showing as present, or may show intermittently?
If you have a good backup (Time Machine or otherwise), I would erase and reformat the disk with "write zeroes to all records one time," then reload the backup, and see if that fixes the problem. If not, you will need to replace the drive, and reload the backup (hope you have one) onto the new drive.
Machine 1. The dim display is likely the result of an old or failing compact fluorescent lamp (CFL), generally refered to as the backlight lamp. This CFL is a long, narrow, delicate, and normally very bright light that runs along the bottom of the LCD screen and is powered by the inverter. You could replace the CFL yourself however or simply look for a used iBook screen assembly or the LCD by itself for about the same cost. CFL sell for $7-15. The first time you attempt to replace it, you should buy two because you'll likely break the first one learning how it work. Watch out for mercury!
Machine 2 The graphic processor unit (GPU) is attached to the logic board using a grid of solder balls. With normal wear and tear the logic board flexes and breaks and cracks the solder joints which results in the same exact symptoms that you are experiencing. The chip must me removed and the solder joints "re-balled" to fix it correctly. Again, you could do this yourself or find a reputable service on eBay for $30-55.
Sometimes, if you grip the iBook with your left hand and apply pressure just below the alt key with your thumb and your fingers on the bottom, while booting, the symptoms go temporarily appear to go away. It's a good way to test for this very common iBook problem.
you uninstall the unwanted application if any application installed in you machine.then disable the the automatic updates. did u check the RAM version which is already available in you r machine.latest one must sync with old RAM so check with system admin
ok from the symptoms you are describing your issue is low ram. If when you finally get it to boot up go to the start menu and right click on Computer or my computer. Then go to properties and tell me what the ram size is. If it is 512 mb or lower you need to increase the ram size. If this is so let me know and I will help you from there. Take care .. Mark
how long does the post takes it to finish before it goes to boot? are there external device connected to your computer like a printer or external hard drive or flush drive? try updating your bios and motherboard chipset.