This is sort of a blind question but I am working on a complex PS in which the main board is the PS board and it's partner board is the regulated voltages board. I found an IN4004 diode out in the main PS board. Apparently this PS blew the main fuse and shut down. My brother installed a new fuse and said it did not do squat.
I honestly cannot be certain of the location of the diode in the circuit and cannot draw this out due to components being in the way of seeing traces and no layout. I am just curious from the experienced, if you find a dead small diode (not a big power diode), does replacement usually fix things up or does that short in the diode usually cause other systems to fail? Also, is it common to have a diode to just fail for no apparent reason or should I be looking for some reason for it's failure?
I just hate to power this board up and risk more damage if I have not found all of my problem.
I honestly cannot be certain of the location of the diode in the circuit and cannot draw this out due to components being in the way of seeing traces and no layout. I am just curious from the experienced, if you find a dead small diode (not a big power diode), does replacement usually fix things up or does that short in the diode usually cause other systems to fail? Also, is it common to have a diode to just fail for no apparent reason or should I be looking for some reason for it's failure?
I just hate to power this board up and risk more damage if I have not found all of my problem.