If D10 was damaged, replace everything what was/is in this line. LEDs, resistors, coils, TR10 and everything triggering TR10.
Something must have caused this overload… probably the already mentioned C19 2,2uF… a dead c19 will destroy all and everthing around Tr10.
And the fuse with 0,5A for 40V is much to late, when this job of destruction is done.
Check also IC6 CD4001 on the cpu. If the 455khz generator fails, it will also trigger TR10. IC6 of th cpu generates the IR signal. TEST IT!