Hello. First of all, I hope this is the right category for this thread.
A friend of mine has got an ASRock H61M/U3S3 which does not power up and he has brought it to me to try to repair it.
The problem is that the board does not power up: the PSU goes in self-protection for a short.
Sadly, I have not found any schematics for this board, so I started looking for broken components. Actually, I have found out that a 1117 regulator placed near the ATX24 connector, which regulates +5V to +3.3V, is heating up when the board is powered. Moreover, an electrolytic 560uF capacitor on the +3.3V line and the PCH are warmer when powered. For these reasons, I had carefully desoldered the regulator and have discovered the +5V line is not shorted.
Therefore, it is the +3.3V line which has problems.
I have soldered back a new 1117 regulator but the PSU still shorts. So I have desoldered the electrolytic capacitor to exclude any possible cause, but the short persists.
May the PCH be the cause of the short?
Attached you can find a picture with the highlighted components.
Thank you
A friend of mine has got an ASRock H61M/U3S3 which does not power up and he has brought it to me to try to repair it.
The problem is that the board does not power up: the PSU goes in self-protection for a short.
Sadly, I have not found any schematics for this board, so I started looking for broken components. Actually, I have found out that a 1117 regulator placed near the ATX24 connector, which regulates +5V to +3.3V, is heating up when the board is powered. Moreover, an electrolytic 560uF capacitor on the +3.3V line and the PCH are warmer when powered. For these reasons, I had carefully desoldered the regulator and have discovered the +5V line is not shorted.
Therefore, it is the +3.3V line which has problems.
I have soldered back a new 1117 regulator but the PSU still shorts. So I have desoldered the electrolytic capacitor to exclude any possible cause, but the short persists.
May the PCH be the cause of the short?
Attached you can find a picture with the highlighted components.
Thank you
Comment