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View Full Version : Computer worked fine yesterday, now it won't POST!


rezilient
09-07-08, 01:22 PM
Hi there.

My system was working fine yesterday, I was using it with no issues. The computer remains on all day, it is plugged in to a UPS.

Suddenly today the computer is not working. Here are the symptoms:

- Computer seemed like it was running, the fans and HDs were spinning.

- When I flipped on the the screen it stayed blank, monitor light stays orange (instead of green) as if not connected.

- The keyboard and optical mouse are not lighting up.

- I can't TS to the machine from my laptop either.

- The router DHCP is not showing that the computer has grabbed any IP address.

Here is the troubleshooting I've done so far:

- I hooked up the monitor to another machine, its working.

- I hooked up the keyboard/mouse to another machine, its working.

- I unplugged all storage devices from Power and Sata, still not POST'ing.

- I removed the memory from the machine, mobo beeps indicating missing RAM.

- I tested the voltage on an arbitrary molex connector, I am getting 12V and 5V although I'm not sure if this is a good test of the PS (probably not)

I don't have any extra DDR2 to test, and my other power supply doesn't have the CPU connector plug, so I would have to buy/borrow those to test. The video card I have will not work, its the old 8-bit AGP I think. I hope its not the CPU or mobo.

Any help is appreciated to help me solve this riddle.

hajalie24
09-07-08, 03:18 PM
What's your PSU? Also did you try using the switch on the motherboard instead of the case?

rezilient
09-07-08, 04:16 PM
What's your PSU? Also did you try using the switch on the motherboard instead of the case?

Its an Antec Earthwatts 500w.

The jumpers on the mobo, to turn it on? I thinks its turning on, cuz the cpu fan starts spinning, so I don't think its a switch issue..? Or did you have something else in mind?

meionm
09-07-08, 10:57 PM
You probably got two memory sticks, try booting up system with only one of them but try each memory stick separately. Also try clearing cmos.

EmAn
09-08-08, 12:00 AM
Unplug everything and then pull out the CMOS battery and let it sit out between 15-min to forever... Put it back in (taking note of orientation) plug everything back in and then try and fire it up.

rezilient
09-08-08, 08:36 PM
You probably got two memory sticks, try booting up system with only one of them but try each memory stick separately. Also try clearing cmos.

Yep that was the problem. One dead memory stick.. I hate Crucial. This will be my 3rd time getting RMA from them. Thanks for the help.