Polaroid P24led12 wont power on

[chrle]

hello, I have this TV ,there is no light on front panel,wont turn on.

I only hear buzzing sound from powerboard.

[JonathanAnon]

Re: Polaroid P24led12 wont power on

Could be a cold joint on the power board... Pictures of the backs of the boards would help, if you feel comfortable taking them out and photoing them... You would need to discharge the caps on the power board...

[ReeceyBurger123]

Re: Polaroid P24led12 wont power on

Check if you have 5v stby first.

[tom66]

Re: Polaroid P24led12 wont power on

This model power board is infamous for shorted diodes which will cause it to click faintly and repeatedly and not power on.

[sordids999]

Re: Polaroid P24led12 wont power on

have u checked the diodes for shorts i have circled in the picture i had this on a tv recently totally dead but just a idea....
but pull one leg out at a time to test

[chrle]

Re: Polaroid P24led12 wont power on

have u checked the diodes for shorts i have circled in the picture i had this on a tv recently totally dead but just a idea....
but pull one leg out at a time to test

I checked this,they are ok...

[chrle]

Re: Polaroid P24led12 wont power on

Ok I checked this caps on picture,I get 12,5 volts on 16v and 35v caps

and 5v on 16vcap.

[chrle]

Re: Polaroid P24led12 wont power on

standby 4.95V

[chrle]

Re: Polaroid P24led12 wont power on

voltage on diodes D708,709,710,712,713 is 12,45 V

[chrle]

Re: Polaroid P24led12 wont power on

.

[chrle]

Re: Polaroid P24led12 wont power on

what to check now?

[sordids999]

Re: Polaroid P24led12 wont power on

what voltages do you have ?

[tom66]

Re: Polaroid P24led12 wont power on

Seems like it is probably another main board problem.

[Shinju]

Re: Polaroid P24led12 wont power on

I just replaced a mainboard in the 32" version, power supply was fine all voltages present, when plugged in the mainboard would start squealing and voltages back from the main would drop or non exsistant.

Replaced the mainboard and it worked, fired right up.