Resolved computer stop working randomly

Hello, my PC stops working randomly, it could be at start, after booting, 5 minutes after I log into windows or 30 min. I tried using my start disk I created, and it froze, tried using memory check and it froze during analysis, tried using windows disk and same result. what it happens is that the cpu stops working although fans and indicators lights on cpu are still on, but the screen is black.
the only way I can turn it off is by pressing the start button on tower for 6 secs, if I try to boot computer right away, I start hearing a bip and it lasts until I turn it off again using the same method. I have to wait like for 10 min so I can turn it on again and not sure if it'll work.

please someone can help me

thanks in before hand

 

Looks like something is wrong either with power supply or motherboard. You can swap your power supply to test it. Check motherboard carefully for any leaking condensors.

 

hello, thanks for the advice rsinfo, I will take a look at that. today I managed to log in in safe mode and took some info which I hope it will help you guys understand the problem.

1.- Log Name: System
Source: volmgr
Date: 9/9/2010 1:12:11 PM
Event ID: 46
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: casa-PC
Description:
Crash dump initialization failed!

2.- Log Name: Application
Source: Microsoft-Windows-EventSystem
Date: 9/9/2010 1:13:13 PM
Event ID: 4609
Task Category: Event System
Level: Error
Keywords: Classic
User: N/A
Computer: CASA-PC
Description:
The COM+ Event System detected a bad return code during its internal processing. HRESULT was 8007043c from line 45 of d:\longhorn\com\complus\src\events\tier1\eventsystemobj.cpp. Please contact Microsoft Product Support Services to report this error.
Event Xml:


3.- Log Name: System
Source: EventLog
Date: 9/9/2010 1:12:33 PM
Event ID: 6008
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: casa-PC
Description:
The previous system shutdown at 1:09:50 PM on 9/9/2010 was unexpected.

thanks for your time

 

I rran chkdsk and it found no errors, dunn if it has something to do with it or not. also tried running dxdiag and I got messages that there was en an error accesing directshow, I updated directx and my video card, but it didnt solved the problem.

will try tthe ram thing.
thanks

 

I checked with mauro about how this turned out. mauro said the RAM was taken out and cleaned [the connectors] and it has been working fine since then.

 

sory it took me so long to come back to check the issue, as mat said, my pc has been working fine since I removed and cleaned RAM modules. thanks pete and rsinfo for your time and help.