Hi guys I am trying to fix this motherboard.
Basically it does not power on. I have 3.3V on the ATX start switch, but pressing it, nothing happens. The Green wire on the ATX PSU connector has 5V but it does not go to 0V so the PSU won't start.
If I force start the PSU, then the red CPU LED illuminates on the motherboard and the fans start but nothing else happens
If I leave it running like that for a minute, the CPU is still cold so probably there is no Vcore (though I didn't actually measure it)
The IO controller chip is NCT6797D but I couldn't find a datasheet, though they do seem availabe to buy
The manual says CPU led on = CPU not fitted or not running, but to be honest it doesn't even try to start the ATX PSU let alone the CPU
I don't have any RAM fitted at the moment as I used my DDR 4 dimms for a build so I have to get a couple more for the test bench, but that can't be causing the problem.
The CPU I am using is a A6-9500 and this does appear to be compatible with these motherboards, though it took a bit of looking to find that out - most sites just list Ryzen CPUs for this board.
To be honest I don't think I actually tried to fix any AMD boards before. Any suggestions where to start diagnosing this one?
Basically it does not power on. I have 3.3V on the ATX start switch, but pressing it, nothing happens. The Green wire on the ATX PSU connector has 5V but it does not go to 0V so the PSU won't start.
If I force start the PSU, then the red CPU LED illuminates on the motherboard and the fans start but nothing else happens
If I leave it running like that for a minute, the CPU is still cold so probably there is no Vcore (though I didn't actually measure it)
The IO controller chip is NCT6797D but I couldn't find a datasheet, though they do seem availabe to buy
The manual says CPU led on = CPU not fitted or not running, but to be honest it doesn't even try to start the ATX PSU let alone the CPU
I don't have any RAM fitted at the moment as I used my DDR 4 dimms for a build so I have to get a couple more for the test bench, but that can't be causing the problem.
The CPU I am using is a A6-9500 and this does appear to be compatible with these motherboards, though it took a bit of looking to find that out - most sites just list Ryzen CPUs for this board.
To be honest I don't think I actually tried to fix any AMD boards before. Any suggestions where to start diagnosing this one?
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