PLASMA PHILIPS MODEL NO. 42PF5321

Good afternoon, I have a problem with a screen of these, which came to our workshop, with the
failure of that switch is protected and the frontal Led Blinking red 4 times, we review the source and was detected that had popped som capacitors, were replaced by new failure remained the same, disconected the card Y-MAIN, and the devices is no longer protected, to review the Y-MAIN board, we found a shorted MOSFET, and was replaced by new.

It is no longer protects on but no picture, I want know if you could help me
Thank you