This receiver has a lot of fuses. Best to check them all. Fuses blow to protect circuits from short circuits that would otherwise cause major damage. Sometimes they blow for some transient reason, and replacing them fixes the problem.

There are three fuses on the large main board, in the upper left corner (when at the back of the device looking toward the back of the front panel).

Use your multimeter to see if the fuse is blown. Set the meter to Continuity and touch the probes to the two metal ends of the fuse. Your meter should beep to indicate that the fuse is still good.

If your meter doesn't beep, then the fuse is blown. Replace the fuse with one of identical rating, reassemble the device, plug it in and turn on the power. If it works, you're done. If it blows again, you will have to look for the cause of the short circuit.