PC refuses to boot. Opened case, replaced CMOS battery. No change. Cleared CMOS using the dedicated jumper. No change. Is the motherboard damaged?

SOURCE: Error 51A2: System cover has probably been opened

I would say you probably need to update the firmware. That should clear any issues you have with the event log

SOURCE: power won't turn off

Hi,

The Green LED on the power board is a warning light to techs to let us know the board is energized and to wait for it to go fully off before changing RAM or anything else on the motherboard. So, ignore that light.

What surprises me is that there are no error beep codes.

Try this out, pull the plug and wait for the light on the motherboard to go off. check that all connectors to the motherboard are tight and all plugs from the power supply are tight, remove and re-seat the graphics display adapter.

At the bottom right of your motherboard is a set of wire connections that are of mixed colors, green and white, red and while, etc. See if the green and white connector and all of them are seated correctly. It could be that the wires from the power on button are not seated properly or have come loose. The power on connector is usually three pins wide but has wires at either side of the connector. Also, some PC have a Case Open Switch, it is usually noticeable by examining the case opening. If you see one, put the case cover back on and try again.

Frankly, it appears your machine is stuck in sleep mode where even removing the power plug does not fix the problem.

The confusion on this problem is that there are no beep codes, and the board is energized which won't happen if the Power Good signal from the Power Supply is absent and thus preventing a bootup. Since, it is energizing the problem may be any of the above I suggested you look at and possibly your motherboard's CMOS chip. This chip instructs the board on how to boot up to the point where the BIOS chip can take over.

Hopefully, you are under warranty and can get service from the maker if nothing can be resolved by our help here at fix ya. Or, if you don't consider yourself a computer tech I'd further suggest you have one get their hands on your machine where diagnostic can be more thorough than we can give you via text messages.

Still, try the above suggestions and let us know.

Thanks,
Worldvet

SOURCE: PC keeps freezing on boot up

Let's narrow the problem down a bit. The biggest clue will be "where" it hangs in the boot process.

1) During (or before) the POST (power on self test).
This would signify that you have a hardware issue. Often, the system will beep at you, and you can decipher those beeps to figure out the problem. Some things that will cause a freeze here are your video card, RAM, the CPU, or even a fan (especially the CPU fan).

a) Video - if you are seeing anything on your monitor, it probably isn't video. If not, replace the video card (if using the onboard video, add an outboard card. If using an outboard card already, then swap it out with another one, boot, and see what happens.

b) RAM - swapping out chips is the only way to test it, unfortunately.

c) CPU Fan - Eyeball it and see if it is spinning. A fan failure will instigate an immediate shutdown, to prevent the CPU from burning up.

d) CPU - Another tough one. The only real solution is to replace it with another one, and see if the system boots.

If it seems to be none of the above, it may be the motherboard itself that has an issue. Once you try all of the above, you can be more certain that it is indeed a bad board.

2) During Windows startup.
This would mean you have a Windows problem. Often, a new driver or some new piece of software can alter things enough to cause a hang. Attempt a boot in safe mode (which loads only default drivers), or even restore the OS to an earlier point. If you get a BSOD (blue screen of death), you'll want to look for the error code on the page, as it will at least give you a clue as to where the problem is. Another option is to boot from the Win Install CD, and effect a Windows repair. This will fix an awful lot of problems.

Cheers
Nick

SOURCE: ASUS p5vdc-MX motherboard won't boot

The light is probably the power light which is ok, but from past experience it sounds like the board is dead for one reason or other. Is it still under warranty? If it is take it back to where you got it, with the purchase docket if you have it and talk to them about what you have tested and ask for a replacement. If it is out of warranty, try ebay or use www.staticice.com.au to search for the same motherboard if you want to rebuild the system without having to reload windows.

SOURCE: Where is cmos reset jumper? Is it near battery,

Try

http://support.acer.com/acerpanam/manuals/acer/0000/servicemanuals/S.G_Aspire_M5640_M3640M1640_BOOK_VerC.pdf


page 77

label CLR CMOS 3 pin type 1-2 clear 2-3 normal