problem in tv philips 32pfl3409 98

hello Guys, I had a different issue and instead of a no display, the tv keeps turning OFF/ON every 1 to 2 minutes. I have a DMM and i can use it normally. I downloaded the schematic and the service manual, all voltages on the main power board are okay, voltages on the SSB (small signal board). I soldered all main filer caps on Primary and secondary sides, and for other power rails on the SSB, the tv worked fine for 6 hours then problem of ON/Off appeared once time only. still not able to locate the problem.

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Mohammad Mansour check the MOSFET's those are usually the cause for the turning off and on of TV's