PC does not boot at all... no sounds

[rkprebates]

I've HP SR1710NX, 5yrs old pc. Mobo - ASUS A8AE-LE.
PC does not boot, not a blip or sound, nothing shows on monitor. LED glows, cpu fan runs continuously. No flickering on front LED, or any sounds at all.

I did few basic things to check.
- Disconnected everything including ram, connectors to all devices.
- Removed graphics card. hard drive. h/d good, checked with other pc.
- Checked cpu. Measured all volts on P1 20pin. All volts are measing as needed - 12v:12.28, 5v:5.13, 3.3v:3.31. ATX12v1 rail is also fine.
- Measured battery CR2032: 3v per specs.
- Reset CMOS pins.

I also did the PSU test y disconnecting everything from psu and inserting with paper clip between green and black colors of M/B power supply and psu fan rotated.
NADA. nothing worked.
Is mobo or processor dead ? Is it possible that bios screwed up?

This PC served me so well for a few years - I love this so much. I'm not yet ready to sing obituary yet I understand it's not worth replace mobo or processor.
Any help is greatly appreciated. Please ...

 

[Tmagic650]

Before we condemn the motherboard, try another power supply. Checking the PSU voltages mean basically nothing checking them not under load. A PSU is cheaper and easier to install than a motherboard

 

[rkprebates]

I replaced with another PSU and just with 2 sticks of ram. Same way. Mobo does not wake up. Also checked the battery that showed full 3v. Didn't notice any leaks on the board from capacitors.

 

[Tmagic650]

When you pull all the memory out and try to boot, do you hear continuous beeps, providing you have a speaker attached to the motherboard?

 

[rkprebates]

When you pull all the memory out and try to boot, do you hear continuous beeps, providing you have a speaker attached to the motherboard?

i don't hear any beeps at all! Since even without using power switch in front of the pc that it turns on itself as soon I put the power plug into the inlet of the PSU, I suspect some sort of short or something might have happened.

 

[Tmagic650]

The motherboard is most likely bad...