Faulty Asus PRIME X570-PRO - no POST / no QLED indication - what could be wrong?

[bluetiger9]

Hello!

 

I got a faulty Asus PRIME X570-PRO motherboard, and I'm trying to identify the root cause of the issue.

 

Symptoms:

• when the power supply is connected the board, the RGB lights from I/O and chipset do turn on
• when I try to power on the system, the fan on the CPU and chipset do turn on
• the system does not POST-s, there is no Video output
• there is no activity on the Asus QLED indicators (DRAM, CPU, VGA, BOOT remain all Off)
• the system does not Turns Off / Reset from the Power / Reset switches (with long hold) - need to power cycle the PSU for Turn Off

Tried two different CPU-s:

Ryzen 5 3400G (2nd get with graphics) and Ryzen 5 3600 (3rd gen).

 

RAM: G.SKILL F4-3200C16D-32GVK, DDR4-3200 16GB

GPU: Radeon RX 4600 (tried with and without external GPU)

PSU: 550W, 24 pin (MB) + 8 pin (CPU) connected
(all the above components are known good)

 

Tried CMOS reset, both with jumper and battery removal method.

 

Any ideas what could be wrong?

 

Is the lack of activity on the Asus QLED-s indicate something? Maybe a corrupted BIOS, or an electrical fault?

 

In case of an electrical fault is there any chance to get a schematics (or repair guide) for the board?

 

Thanks,

Attila

 

 

[Corgi2Life]

I have the exact problem. No solutions yet.