Question PC only power on (no display) only when I remove CMOS battery

[mag1520]

I have an old pc (mb giga , ddr2 ram , 512mb gpu )

It doesnt turn on so i changed power supply

the first power supply I test result : cpu fan and gpu fan turns on immediately after power on power supply (not clicking power button) but no display.

I changed power supply

second power supply results : I should remove CMOS battery then It powers on when I click power button but no display the power button doesnt work to power it off

and its like a dead PC with CMOS battery



NOTE: RAM tested , gpu tested , cpu tested and second power supply is now working on another PC

 

[RLGL]

Try a new battery

 

[Steltek]

And, for future reference, removing the CMOS battery while power is applied to the system is something you should not do.

 

[mag1520]

Try a new battery

tnx for reply
I tried but still nothing happens ...

 

[mag1520]

And, for future reference, removing the CMOS battery while power is applied to the system is something you should not do.

tnx for reply
I do that when its off :-(

 

[Steltek]

If the motherboard has onboard graphics, did you try connecting the monitor to that and pulling all the hardware except a single memory module (including unplugging any storage drives)? Try moving the memory module to a different slot, and swap it out in case you have a bad module or slot?

 

[mag1520]

If the motherboard has onboard graphics, did you try connecting the monitor to that and pulling all the hardware except a single memory module (including unplugging any storage drives)? Try moving the memory module to a different slot, and swap it out in case you have a bad module or slot?

tnx for reply
my motherboard doesn't have onboard graphic
I changed the slot of ram a lot , it didn't work
even I took out everything (ram , gpu , CMOS battery) still I have nothing except cpu fan turning and no motherboard speaker sound :-(((

 

[Steltek]

Well, it sounds like you've done everything you can. At this point, I'd suspect that the motherboard is dead since you've verified everything else works.