Re: Dell Optiplex 990 psu H240AS-00

Hello hed190 I live in the south-east asia country,I have an experience to share with for the H240AS-00 PSU from Dell. For the problem you've asked ,You should also check some components on the board locate on P3xxA Connector behind the Q51(STW12NK09Z). From my experience,components on this board usually damage after the short. I use 470pf 2KV or 680pf 2KV (Blue one) instead of the old one.For R25,I use any value from 0.1 ohm to 0.5 ohm 1W wire wound or metal film type.