Member Avatar for mgrunge1967

My computer was running one day after I re-built it a few weeks prior to this, and when I got back to it, It had shut off and wouldn't restart. I changed the power supply and tested the CPU so both are good. I tried anouther HDD in it that I knew worked and still no change. When I power the computer on, everything starts to work but nothing is displayed on the screen yet when it just shuts down. The power switch doesn't work at all but, the reset switch will power it on after pressing it twice in a row, after each shut down. I switched to a case that I used to use for the same system and still no change so I know the power switch isn't plugged in backwards. The case I was using when the problem occured was a case that housed another system, but the mother board went in that system. the only part that was not swaped out of the old one was the case, the cd drives and the floppy drive. Is there a such thing as a case killing a mother board.

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  • Latest Post Latest Post by slinger102

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A short, practical checklist to run before replacing the board — building on the directions from , and and focusing on tests that isolate the motherboard itself.

  • Bench-test the board outside the case on a nonconductive surface with only CPU + cooler, one known-good RAM stick (try the slot nearest the CPU), GPU only if required, speaker and PSU. Power the board by briefly shorting the two power-header pins with a screwdriver (this isolates any front-panel switch wiring). Listen for beep codes or watch for POST/LED indicators.

  • Do a careful visual inspection under good light: look for bulging or leaking electrolytic capacitors, cracked components, blown solder joints or scorch marks around the 24-pin and 4/8-pin power connectors and VRM area. Smell for burnt components. These are strong signs of board failure.

  • Verify front-panel circuitry: measure the power and reset switch continuity with a multimeter. If the board only powers via the reset wiring but the power pins fail to respond even when shorted, the front-panel header or the motherboard power-control MOSFETs could be faulty.

  • Check PSU behaviour and rails. Use a PSU tester or multimeter to confirm +12V, +5V, +3.3V and +5VSB. Also test PS_ON behaviour: if the PSU stays on when PS_ON is forced low but cycles off when connected to the board, the motherboard is asserting a shutdown.

  • Clear CMOS and confirm the CPU fan is connected to CPU_FAN (some BIOSes will shut down on missing CPU fan). Try single-stick RAM testing and a speaker for beep codes to narrow down POST failures.

If the board fails these minimal, out-of-case tests and shows physical damage or nonresponsive PS_ON control, replacement or RMA is the practical next step. For reference on POST/beep codes and PSU basics see Power-on self-test and Beep code. Take standard ESD and safety precautions and disconnect mains before probing.

Member Avatar for lornranger

When I power the computer on, everything starts to work but nothing is displayed on the screen yet when it just shuts down.

Have you tried swapping the graphic card? How do you know that everything is working? Do you hear the Windows Welcome sound on your speaker?

Member Avatar for angelopc

You may also want to check that there are no stray screws lodged between the case and the motherboard. That can surely kill the motherboard and leave you scratching your head.

Member Avatar for mgrunge1967

The graphics card is brand new and I did swap it out, no noise from speakers. I checked out everything and it is definitly the motherboard. There are no loose screws, I alway chack for them due to a previouse incident. The only ppossibility is that the power supply still works buy sends surges. Everything exept the internet is connected through a surge protecor, I just now got a battery back-up that protects everything. And I switched power supplies to eliminate that possability.

Member Avatar for angelopc

Glad to see that you found the problem. Are you going to investigate, further, to the component level, or are you just going to replace the mobo?

Member Avatar for slinger102

first of all i cant stand the people that offer wise guy remarks instead of help.:sad:


The thing i have found to give alot of problems in no display is the memory {ram}.:twisted:


if you have known good memory swap it out.

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