What I've done this arvo on this:
- rather than mount transformer on foam, I've used 4 x post rubbers (blk) under each foot and screwed back in
- removed sound board, ppb board & power board, sanded and cleaned each pad (for gnd) and re-flowed each and every connector pin
No different....
I havn't bothered with the CPU board as yet as I don't know if it will make any difference.?