AM1H-ITX power down issues

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   the shutdown issue was the first symptom that i noticed. the root problem is that the motherboard is constantly sending POWER ON command to the psu, which is a motherboard fault. the hdd really has no issues here.
the motherboard should trigger/short pin 16 only when a wake up event happens (either via button switch, either some wake on X event). In my case, pin 16 is constantly shorted, sending power on signal to the psu all the time, which is wrong. the pc works "fine", it just cannot properly power down to "off" state (sleep, hibernate or whatever), since psu is constantly in full awake state. 

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vesoljc Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 12 Jul 2015 Status: Offline Points: 13	Post Options Post Reply Quote vesoljc Report Post Thanks(0) Quote Reply Posted: 20 Apr 2018 at 6:38pm
	the shutdown issue was the first symptom that i noticed. the root problem is that the motherboard is constantly sending POWER ON command to the psu, which is a motherboard fault. the hdd really has no issues here. the motherboard should trigger/short pin 16 only when a wake up event happens (either via button switch, either some wake on X event). In my case, pin 16 is constantly shorted, sending power on signal to the psu all the time, which is wrong. the pc works "fine", it just cannot properly power down to "off" state (sleep, hibernate or whatever), since psu is constantly in full awake state.

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 22793	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: 20 Apr 2018 at 8:40pm
	Check the underside of the board for bent over/shorting solder points. I understand what you are saying and no, that should not be happening. If there is no obvious short (that is easy to fix), I suggest you RMA the board if at all possible. I have seen similar issues caused by a standoff in the wrong place causing shorts. You have taken the board out of the case but if something under the board shorted it may have created a carbon trace or bent over one of the capacitor/component wires soldered through the PCB. Give it a good going over, I would start with the underside of the board nearest the 24pin connector. Good luck


cristy6100 Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 15 Mar 2018 Location: Romania Status: Offline Points: 269	Post Options Post Reply Quote cristy6100 Report Post Thanks(0) Quote Reply Posted: 20 Apr 2018 at 10:22pm
	As the others before me have said to check for a short on the underside of the motherboard ATX connector, but you can also check for a short on the front panel I/O pins, where the case leds/buttons are connected, you can clean them with some alchool and a soft tissue. If still the same, the motherboard I/O chip might be busted by a power surge/ESD, but if I remember right you can also take out the CPU and re-seat it. Those AM1 CPU's are a little flaky, they have everything on them including the south-bridge, and just a bit of oxidation on the pins in a more humid climate can cause unforseen problems. Its worth a try, if nothing suggested in this thread works, your last bet unfortunately is RMA/warranty Edited by cristy6100 - 20 Apr 2018 at 10:24pm
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