Bam! she posts. thanks again for your help.

PSU is not original as it's from parts that i'm putting together. I had some parts from my original 486 and am adding the rest. I will desolder and replace it and let you know how it goes.

It's blue, only one of them has continuity on both legs. I'm guessing that's the gremlin? It's the third one from the left directly under the power connector. Can I just say I really appreciate your help.

ok so if i unplug the psu and check the 4 GND pins with the others there is only connectivity from all the grounds to one of the outside pins. I can't see any visual damage on the board though.

ok cool so with the multimeter am i checking for continuity or voltage?

Hi guys, I can't figure out what I'm doing wrong. I can't seem to get my board to post just get a buzzing sound and the PSU seems to stop supplying power as the fans in the psu and on the cpu don't spin. if I disconnect the PSU from the board it works again. seems to me it might be a setting …