Sudden Computer Death Part 2!

Bluenile

Weaksauce
Joined
Mar 9, 2005
Messages
75
Original Thread

The Build:

DFI 925X-T2 Socket T (LGA 775) Intel 925X ATX Intel Motherboard
Intel Pentium 4 550 Prescott 800MHz FSB 1MB L2 Cache LGA 775 Processor
CORSAIR ValueSelect 1GB (2 x 512MB) 240-Pin DDR2 SDRAM Unbuffered DDR2 533 (PC2 4200) Dual Channel Kit System Memory
CREATIVE Sound Blaster Audigy2 ZS
Maxtor L01M200 Hard Drives 250GB Sata
Plextor DVD Burner PX-716SA/SW
BFG GeForce 6800 GT OC 256MB DDR3/PCI-E/TV-Out/DVI
Antec True550 EPS12V
ALPS Silver 1.44MB 3.5" Internal Floppy
LINKSYS WMP54G
Antec SUPER LANBOY case

The Problem

So the computer just made a trip across the state of washington. Once it was setup I checked to make sure all the cables were still connected. Computer powered on fine. Lights, floppy noises, hard drives, and CD burner. Got into XP fine, read some manga on the comp for five hours and left it and left the room for four more hours.

When I came back to the room the computer was off. Turned it on. Fans start spinning and case lights turn on. But the monitor never gets any signals. Four seconds later it powers off for four seconds and powers on again. Fans spin and the lights are on indefinitly but no other hardware or signals to monitor.

Rechecked all external and internal cables and they are all conected. Retried it this morning and same thing.
The temperature in the room was always comftorable and the case temp never got over 30C and the CPU never over 39C. No overclocking.


UPDATE

So I finally got the PSU RMA'ed (lack of time) and got it back. I removed the motherboard from the case and re-attched it. I only have a stick of ram connected to it besides the CPU/heatsink. Turn it on, it only spins for a second and turns off. Do I need something else connected or is there a problem somewhere?
 
I wonder if there's a short somewhere in the power connections with your case or something. Would you describe the time it's turned on as being roughly 4 seconds? Maybe it thinks you're holding the power button down after you turn it on.
 
One second approximately. I'm using the manual "power on" button on the motherboard though...
 
Does anyone see something obviously stupid that I am doing or should I look into trying a different motherboard?
 
The checklist goes as follows:

- place the mainboard on a non-conductive surface (e.g. cardboard), install the CPU & HSF
- reset the CMOS
- attach the PSU and turn the system on
- if there's some kind of PC speaker (onboard or external), the mainboard will complain about missing RAM
- if it does, add RAM and turn the system on again
- this time it should complain about a missing videocard
- if it does, add a videocard and turn the system on again after attaching a monitor
- you should now be able to get into the BIOS

- aside from the mainboard, you can try replacements for the following components: CPU, RAM (after trying different slots), PSU. And PC speaker if you're paranoid :)
 
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