Got hold of this motherboard which seems bricked and I'd like to find (and repair) the faulty bit.
It won't get to POST at all. No images on screen and no beeps from the speaker I attached
what works after pressing power switch:
- CPU fan spins
- Audio Noise Guard (yellow LED) is lit
- power LED is lit
I tend to think it is some hardware failure also because BEFORE pressing power switch, when the PSU is powered:
- Video output is somewhat present (screen detects some signal/voltage from HDMi cable)
- All USB ports have some power.
- it is not possible to switch the board off keeping the power button pressed (after some seconds the LEDs starts blinking)
What I tried:
- different CPUs, GPUs/APUs, PSUs and RAM (sticks and slots).
- different BIOS versions (all flashed with flashrom v1.2 via CH341a on MX25U12835F)
I have a backup of the BIOS that was on the chip if is of some use.
Any idea is welcome
It won't get to POST at all. No images on screen and no beeps from the speaker I attached
what works after pressing power switch:
- CPU fan spins
- Audio Noise Guard (yellow LED) is lit
- power LED is lit
I tend to think it is some hardware failure also because BEFORE pressing power switch, when the PSU is powered:
- Video output is somewhat present (screen detects some signal/voltage from HDMi cable)
- All USB ports have some power.
- it is not possible to switch the board off keeping the power button pressed (after some seconds the LEDs starts blinking)
What I tried:
- different CPUs, GPUs/APUs, PSUs and RAM (sticks and slots).
- different BIOS versions (all flashed with flashrom v1.2 via CH341a on MX25U12835F)
I have a backup of the BIOS that was on the chip if is of some use.
Any idea is welcome
Comment