Hi guys,
i ask for your help please, it is my first time attempting a fix

i try to fix a car audio amp (jbl 75.4)
-at first, a rear left channel was blown - so i replaced all tip35c&tip36c to new ones
-to be on the safe side, i replaced all old fqp50n06 too
-all worked ok for one minute and then the new tip36c on q345 became shorted
-i replaced it to a new one again and tried measuring around it but i might missed other issues

now if i try to power it on R350 would burn instantly
can you please advise what could cause that?

 

Check the transistors (for opens as well as shorts): Q335, Q345; Q334, Q344; Q340; Q333, Q343; Q331, Q332; Q341, 342.

 

Probably Q334 and Q344 shorted, but do check all the ones AlbertHall listed.

 

What is the voltage at the junction of R360/370 compared to Gnd.?