Re: DELL L230N-00 (aka LITEON PS-5231-2DFS-LF) PSU - no PWR_OK

Thanks for the tip .. but the PSU doesn't work when connected to the MB - you get the dreaded Dell flashing orange light on the Power Button ..

Hi All,

I have said 230W PSU failed in my girlfriend's comp recently.

On applying 240VAC:

+5VSB (Purple) measures 5V as expected.
PS_ON measures around +3.8V (is this normal ?)

Upon shorting PS_ON to GND:

+5V, +12V, PWR_OK all rise momentarily (up to about 150mV on DMM) then fall back to ~5mV

All caps appear OK on the board - can anyone give any clues where to look - or better yet have a schematic of this PSU ?

Curiously, a replacement noname brand PSU I fitted to the Dell has just...