Question System is not powering on ?

Abs2428

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Mar 17, 2019
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i have Dell Optiplex 990.

When I plug power cord to power, PC does not get power, even the LED light of PSU doesn't turn on, I press power button but it still doesn't turn on. But when I press PSU diagnostic button, PSU turns on , PSU LED turns on, CPU Fan also turns on, but there's no display.

What is the problem? Help me.
 

Abs2428

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Mar 17, 2019
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no i dnt hear anything, because power supply doesnt transfer power, when i press diagnostic PSU button then it gets power and transfers power but nothing displays and no beep
 

Abs2428

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Mar 17, 2019
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does it make any problem if we take out the CMOS battery for so long like few days, and it could be CMOS battery that was not present made this issue
 

Abs2428

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Mar 17, 2019
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To be honest with you i dont know, the max i left it out was 1 minute.
i just checked it with another PSU, still the same issue no change, but i found there an edge of RAM slot was broken, i guess something forcefully pressed on board maybe, that it is not turning on, but when i press PSU diagnostic power button, the cpu and case fan turns on, PSU LED also turns on but no beep code and no dell diagnostic lights and no display
 

Abs2428

Prominent
Mar 17, 2019
54
3
535
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I think your best bet is to try it with a different motherboard.
If you dont have it,i quess taking it into a pc service is not a bad option.
ok for sure i will take my own mainboard from my Home PC and will try it, if not then will take to PC service
 
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