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MB error? PSU? Memory?? Help troubleshoot

S

scp89

n00b
Joined
Sep 17, 2005
Messages
30
Ok I have a setup that I'm building for a project of mine....

I'm having some issues with....I've tried 2 different MB's with the same result...

when I power the system on (cpu hs/fan, memory, and video card with a PSU on a test bench) The power starts to come on...cpu fan spins up then it immediately powers off... what could this be? is it a cpu problem? is it a possible bad PSU? is it memory incompatibility???

anyone have any ideas?
 
Specs of the PCs would help. And see if these steps help out:

enginurd said:
/*------------- <cut n paste> -------------*/
This is basic troubleshooting if your system has never POSTed (as in, you just put it together); Though, it may be helpful to others whose system no longer POSTs...
If you have both the 20/24 pin main ATX connector plugged in, AND the 4-Pin (or 8-pin) ATX12V P4 CPU connector plugged in, then the board should boot fine (unless it requires more power connectors from the PSU). First, try clearing the CMOS w/ the proper jumper or button.

The next thing you could do is test the PSU. Jump start it (on the main atx connector, short the green wire with any black wire, using a paperclip), and see if it stays on. If not, then its probably a faulty PSU. If it works then you can proceed with the suggestions below. ***NOTE: The paperclip trick is a simple test for those that do not have PSU testers, multimeters, nor a spare PSU to test with. It is not a 100% conclusive test of the PSU.

How to test with a multimeter @ BFG

Setup everything outside of the case, with the mobo on top of its cardboard box. Plug in only the essentials:
- PSU (namely: main 20/24-pin ATX connector and 4-pin ATX12V P4 CPU Connector; The 4-pin should work in the 8-pin EPS12v plugs, too)
- CPU w/ HSF
- Single stick of ram
- Videocard if there is no onboard video (along with its power connector, if it has one)
- System speaker/buzzer (your board may have an on-board tweeter/buzzer/speaker)
- Monitor & Keyboard

Reset/Clear the CMOS by following the instructions in your mobo manual.

* Use a screwdriver if your board doesnt have an onboard power switch. Jump the two power switch leads to turn the power on.

If it won't post, try different RAM slots. If it still won't post, pull out the ram (so no ram in the system) and listen for error beeps. If none, pull the vidcard and listen for error beeps. If none, re-seat the CPU and HSF, then try again. Report back with results if you're still having issues.
/*------------- </cut n paste> -------------*/
Click to expand...
 
ok I got it to post...my power switch was shorting out....

now I can't seem to get it start to boot...whether I specify floppy, HD, CDROM or whatever in bios...I can't get it to boot any device...

this is a OEM MB...FIC P4M-915G/PD1 Intel 915G Socket 775 mATX MB

I picked it up on the cheap...and I'm using it for a Mame Machine that I'm putting in my Arcade cab....
 
Test the RAM, CPU, hard drive, power supply, CD drive, and video card on another PC. If all those parts check out, then that mobo is defective.

Also, reset the CMOS on the mobo as well.
 
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