I have a phoenix gold ti1500.1 amp going into protect mode after 1 second power. I found 1 irf640n shorted and ther rest were fine. I replaced the whole bank of 5 just incase. I haven't fou d any other bbn components bad. any help would be appreciated
The most common problem is the two transistors highlighted in the attached image. If you look at the ones on your board, you can see that they've turned brown from overheating.
