i bought a bad amp and i replaced the p/s fets with irfz44n and one channel with 540/9540. and now the amp works but the repaired channel is distorted. does anybody know what could be causing this? several yrs ago i bought a repair cd from perry babbin and it was very informing. in fact so informing that several yrs later i'm still learning. haha. i've had a fair amount of success, ive repaired bad p/s, outputs, broken boards/traces, ect... but i still have problems with the smaller things (caps, diodes, transistors, ect). if anybody could help it would be great. the pics are of a 60hz wave 1 good 1 bad. i have all te equipment needed and quite a few parts on hand.