Order of the Butterfly
Posts: 204 from 2005/10/13
From: PACA, France
Quote:
You've suggested what to check but could you enlighten me on the possible causes, apart from a broken power switch ?
The PSU relies on the PS_ON pin being brought to digital ground level to power itself on. If the earthing is not correct, charges can cumulate on the line depending on how the PSU is built (and the technology of the components; for example MOS is quite sensitive to stray charges since the oxide on the gate is an insulator) and the logic may detect a 0 when it is supposed to detect a 1.
This kind of problems usually become visible/more acute during winter time, since the air is dryer inside the homes (heating).
Quote:
How could this cause the problem I'm experiencing ?
Here in Japan, power outlets rarely have an earth connection, I guess earth is floating for my board. It's never been a problem before though.
The PSU is fairly new so it is less likely to be the source of the problem.
Thanks for the suggestions.
Did you just mention that the PSU is fairly new? New as in "I've installed it shortly before the problems started"?
