539: All capacitors changed 
(Original large capacitors 1500uF 50V)
C13: 1nF 1000V (Was leakege 15k)

2191: F5A -2 (Original F6.3A), PFC: IRFP460,
R243, R244: 18R 2W
R47, R48: 0.22R 2W
All IC's and optocouplers on PCB module instead UC3844
Cooler 12V Current must be 100 - 140mA (original 12V 140mA) 
Optional to use 24V Cooler
Cleaned and tested with loading 24V - lamps.
3514: IRFP460 -1. Cooler 12V - repair.  18R 2W => 39R II 33R -2 sets.
0.22R -2 => 0.2R -2.