No start after unplugging from wall socket -

[shazza]

I know this is a long shot, but maybe someone has a clue what's going on with my issue. I just completed a mini-ITX build in the Lian Li PC-Q09F baby case. I used the included 150W PSU and the GBH55N-USB3.0 mini-itx board with i3 540 CPU. Everything was great until I unplugged it from the work area to move it to the TV area. It will not power up when it is unplugged, then plugged back in later. (The computer is shut down before unplugging)

Have the same issue with multiple PSUs. Resetting CMOS will usually allow it to power up, although it may take multiple tries. Computer works fine when shut down, then re-started, as long as it is not ever unplugged.

Have done the following:

1) Taken the build out of the case to minimize possibility of a short
2) Tried removing RAM sticks and changing RAM, unplugging all USB peripherlas - problem still occurs
3) Have tried different BIOS settings - including options for recovery from power failure. Problem still occurs.
4) Have replaced battery - problem still occurs

Now thinking it is probably a motherboard issue. Will try a different CPU just for kicks