philips 42pfl3506 working for few seconds and after shut down

[wolf1976]

hi
i have the above tv it turns on for few seconds and after shut down
can you suggest me what can be cause this problem ?

[tvtimmy]

Post clear photos of the power supply.

[lotas]

Replace the PWM in the power supply (common fault). Optocouplers also suffer.

[wolf1976]

thanks sir lotas i replaced only pwm and its ok without to replace the optocouplers