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won't boot

By moodye ·
MY power at home went out and when it came back on the computer won't boot. The system does the post check and after that the monitor goes black.
does anyone have any idea what could be causing this problem.Thank you in advance

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won't boot

by TheChas In reply to won't boot

There are a LOT of possabilities here.

Does it sound like the PC is continuing with loading Windows?

Does the power supply in the PC shut off when the monitor goes blank?

How about if you boot with a startup floppy?

Does the monitor simply go blank?
Or, does the monitor shut off? (yellow lamp)

Can you swap in a different monitor?

How about a different power supply for the PC?

Let us know the answers to the above questions, and we can help direct you to an answer.

If youare not familiar with working inside a PC, you might want to try swapping the monitor.
If the monitor is not the problem, you might want to take the PC to a local PC shop for an evaluation.

Chas

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won't boot

by moodye In reply to won't boot

NO it isn't continuing to load windows
The power supply does not shut off
NO i can't boot from a bootdisk
The monitor gets the yellow lamp
i've changed power supply,monitor,and hd i still get the same thing.

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won't boot

by CG IT In reply to won't boot

Humm...this is in addition to TheChas's questions...what kind of graphics card? PCI or AGP?

There are two things you can try to do. First is turn off the computer and disconnect the power cable. Locate the clear CMOS table jumper on the mainboard and jump it to clear the CMOS table. Return the jumper to the original settings Check with the mainboard manual to ensure you've got the jumper back to the correct setting. Now try to boot up. If that doesn't work, one other option you can try to do is take everything out [all PCI cards {including the Vid card if it's PCI}and the Video card], including the memory. Disconnect all IDE and Floppy drive cables from the mainboard. Disconnect the power supply ATX connector from the mainboard. Take the CMOS battery completely out and let the computer sit for a couple of hours. Next, take the heatsink off the processor and reset the processor [hope it's a PGA], reapply thermal grease, reinstall the processor, then the memory. Install the Video card and reconnect the Floppy drive cable. Insert a bootable floppy and see if the computer will boot to the floppy.

Further question: what beeps to you hear. Important to note long and short beeps and the # of beeps you hear [if any].

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won't boot

by CG IT In reply to won't boot

note on removing all items: includes disconnecting the mouse and keyboard.

Further: to troubleshoot a POST sequence failure, most mainboards provide a beep code. Let us know if you hear any beeps [as mentioned above].

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won't boot

by moodye In reply to won't boot

I've tried the CMOS, that didn't work either. and the video card is an intergrated Trident video card. I will try taking everything off the board and redo it after a couple of hours. Thanks for all the help

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won't boot

by TheChas In reply to won't boot

Okay, now that we have narrowed things down a bit, I suggest that you go with DR's suggestion, and reset the CMOS.

Next, can you enter BIOS setup?
Does the BIOS recognize ALL drives properly?

Are your drives performing their own POST tests?
You should hear the drives spin up and perform a seek operation, and the drive lights should flash on for a few seconds.

I wonder if a power surge occoured when the power shut-off.
If so, it could have propegated through the power supply, and damaged the MB, CPU, or RAM.

Another thought comes to mind.
Often when the AC line surges, so does the phone line.
Try removing, or disabling your modem.

Chas

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won't boot

by moodye In reply to won't boot

the cmos i've already tried, right when i get into it the screen goes off (yellow lamp)

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won't boot

by TheChas In reply to won't boot

Okay,

It is starting to sound like the motherboard was damaged.

You could try a plug-in video card in case it is just the on-board video that was damaged.

When you take everything apart, look the motherboard over closely.
Look for discoleration on any resistors,
and bulging or liquid leakage on the capacitors.
It's a little harder to see any damage on ICs and transistors, but give them a good look for burnt spots and bulges also.

Chas

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won't boot

by moodye In reply to won't boot

Thanks a lot that helped

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won't boot

by moodye In reply to won't boot

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