Hello guys,
I have a problem with this PSU and need your help and knowledge. The unit will not turn on most of the time, but sometimes it does, and then it works fine. +5Vsb is always present, but grounding PS_ON nothing happens. Cycling the power switch (sometimes I can hear a spark pop from the switch) and it will start up after 3-10 cycles randomly, and then all voltages are fine. Remove PS_ON jumper and it won't turn on again until some power cycles. Sometimes it would just turn on for a sec, and then turn off immediately (relay clicks). It is the same as this video shows:
Youtube link
Opened up the unit and I can't see any obvious problems: no bulged caps, no burn or heatmarks, no visible cold joints, nothing. When it turns on nothing seems to be overheating, no smell or smoke. Only the biggest transformer is getting a bit warm, but not hot.
I am quite surprised I can't find any information on this problem, because looking at the market reviews, this whole MWE series has many issues (this one and coil whine) with almost all models. Maybe some of you have encountered this problem, or know what might cause it?
Thanks,
David
I have a problem with this PSU and need your help and knowledge. The unit will not turn on most of the time, but sometimes it does, and then it works fine. +5Vsb is always present, but grounding PS_ON nothing happens. Cycling the power switch (sometimes I can hear a spark pop from the switch) and it will start up after 3-10 cycles randomly, and then all voltages are fine. Remove PS_ON jumper and it won't turn on again until some power cycles. Sometimes it would just turn on for a sec, and then turn off immediately (relay clicks). It is the same as this video shows:
Youtube link
Opened up the unit and I can't see any obvious problems: no bulged caps, no burn or heatmarks, no visible cold joints, nothing. When it turns on nothing seems to be overheating, no smell or smoke. Only the biggest transformer is getting a bit warm, but not hot.
I am quite surprised I can't find any information on this problem, because looking at the market reviews, this whole MWE series has many issues (this one and coil whine) with almost all models. Maybe some of you have encountered this problem, or know what might cause it?
Thanks,
David
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