Philips 42PFL3704D/F7 Turns on Then Shuts Off

[barryra]

I'm working on a Philips 42PFL3704D/F7 when it's unplugged for a day it will turn on & work for about an hour... then shuts off... power lights & screen off. When I hit power button on remote or tv.... I hear a click... power light comes on for a few seconds.... nothing on screen... then power light turns off & there's a click.

Any ideas? Thanks

[barryra]

Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

Anyone have a idea? Caps look good

[tom66]

Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

Could you supply pictures of the boards so we know what we're dealing with? Also one of the whole TV chassis.

[barryra]

Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

Sure.. thanks for the reply.

[barryra]

Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

did you get a chance to look at the pictures tom? Thanks

[tom66]

Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

Ugh... yeah... it's one of "those". A Funai based "Philips" set.

http://www.toms-service-manuals.com/...&Search=Submit

Top result.

There are several parts which produce voltages for the rest of the TV. Page 52 has some, as does page 56. These are low voltage supply voltages for the main board and the 24V for the backlight inverter.

[barryra]

Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

Oh ok... so it may not be as easy as replacing caps on the power/inverter board? I'll check some voltages.

[tom66]

Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

Bad capacitors are an issue on these but they are less common than other faults.

[barryra]

Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

Thanks Tom, I'm still trying to pinpoint the issue.

[tocold4u2]

Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

I am suppose to pick one of these up that keeps blowing fuses when powered on ..will lert ya know when i get to open it up

[ftaylor74]

Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

Barryra... did you ever resolve this problem? I have a similar problem on my in-laws TV.

[Phydoux]

Re: Philips 42PFL3704D/F7 Turns on Then Shuts Off

I'd be interested to know what the issue was as well. I have the same model (but looks like it may be a different serial number) with the same issues.