Based on your 1st post in this thread, it seems amp was working fine before you began the recap and replacement of certain transistors. That would seem to me that a your issue must have something to do with a component you have replaced or a suspect solder joint. You mentioned you replaced the dual 798's with 992's. Did you receive your tester and gain match the four 992's prior to replacing? Have you rechecked Q3 pin outs since you say you swapped it out?
If it were me, I might re-install the original 798's and original Q3 and see if you can get back to original working order. Does the protection relay pull in after the normal 4-5 sec? Hopefully someone more knowledgeable will chime in.
The amp did operate, but sounded off in the right channel. The relay was and continues to engage slow, like 7 seconds. Maybe a tired relay driver. Also, the sound does not kick in immediately when the relay kicks in, which I have read that it could be breakthrough. I have a replacement on order.
I replaced all the e-caps. I walked back through the board and verified placement and values. They are all right. The only transistors I replaced were the 2 2sa798s. I did very carefully install them per the silkscreen. I did match them and they did not seem to make much of a difference. Before replacing them it was 23VDC on the left (TP1, TP2) and 60VDC on the right channel (TP3, TP4). After replacing them they are 61mv for left (TP1 TP2) and 16.2v on the right (TP3, TP4). Seems they flipped. I could replace them, but they are on the known suspect transistor list. I am studying the schematic and think there are some other resistors that need to be checked. Need to verify R33, R27, R37, R36, R38, R34, R28, R30... basically all the resistors that connect into those transistor's pins.
I am going to take more reading to verify, and also test some resistors. Most the transistors voltages look acceptable. There are several that should be at 0v on pins, but read in the low mv, Not sure that is a concern.
I am likely going to need some help from someone to help me diagnose this if it goes much farther.