peeling innards on a MCintosh MC2505 . amplifier king of transistor amplifier

MCIntosh MC2505 in this video it is explained in a block diagram what parts are in this amplifier starting from the power supply block to the power output. I present this to make it easier for a technician to localize what parts are often damaged on this amplifier. It is very difficult. If I go into more detail, because each brand of amplifier has very different damage. The main step that a technician must have is having a multitester.