Philips 37PF9731D/10 - no picture PART2

[mcbain]

Hi everyone

I have got this Philips LCD model 37PF9731D/10
This tv got no picture but faint sound coming from a movie that playing from my old vcr.
There is green power light thats stays on all the time
I have open the tv and when the tv is on i unplugged the power feed to the mainboard and connect again the screen will light up and i got picture, but the sound stays faint. The On screen menu does not come on or i can increase the volume.
I there is no bulge og leaking caps, no nothing visual.
What can be wrong??
p.s can it be the mainboard

[tom66]

Re: Philips 37PF9731D/10 - no picture PART2

So which connector do you unplug at it works mostly?

[mcbain]

Re: Philips 37PF9731D/10 - no picture PART2

the dark grey one upper corner to left in the middle

[mcbain]

Re: Philips 37PF9731D/10 - no picture PART2

yes and i can connect through the scart plug from my vcr, but it seems that the hdmi does not work, only the scart, also the menu does not show.

[tom66]

Re: Philips 37PF9731D/10 - no picture PART2

Does that go to the PSU?
I bet there is some power supply on the main board that is missing, something common to HDMI and the OSD, but not the rest of the video.

[mcbain]

Re: Philips 37PF9731D/10 - no picture PART2

yes this is connect to the psu, to the top of the psu on the picture

oki now if i connect the hdmi, the panel become red and the blue with black stripe in the middle

strange this that the picture from my vcr throug scart is good, but the sound is faint as usual

[tom66]

Re: Philips 37PF9731D/10 - no picture PART2

OK, do you know the chassis number for this set?
e.g. LC4.3

It will be written on the model sticker.

I will look up a schematic for the main board, Philips usually provide them, makes finding faults easier.

[mcbain]

Re: Philips 37PF9731D/10 - no picture PART2

service manual:
http://www.scribd.com/doc/32595616/P...ssis-Lcd-Tv-Sm

if you need more pics, let me know

[budm]

Re: Philips 37PF9731D/10 - no picture PART2

"To download this document you must become a Premium Reader" Do you have to join just to down load this manual?

[mcbain]

Re: Philips 37PF9731D/10 - no picture PART2

i think you have to pay for the manual sorry, but this online version gives some clue

[budm]

Re: Philips 37PF9731D/10 - no picture PART2

So is your chassis FJ3.0E LA (as shown on front page of your link)? this chassis number is for the 42"
http://elektrotanya.com/?q=showresul...oria=&kat2=all

[mcbain]

Re: Philips 37PF9731D/10 - no picture PART2

yes the "top B" one 37"

[mcbain]

Re: Philips 37PF9731D/10 - no picture PART2

Hi everyone

I have got this Philips LCD model 37PF9731D/10
This tv got no picture but faint sound coming from a movie that playing from my old vcr.
There is green power light thats stays on all the time
I have open the tv and when the tv is on i unplugged the power feed to the mainboard and connect again the screen will light up and i got picture, but the sound stays faint. The On screen menu does not come on or i can increase the volume.
I there is no bulge og leaking caps, no nothing visual.
What can be wrong??
p.s can it be the mainboard

Here is a youtube video of this problem:
https://www.youtube.com/watch?v=iLfmSfvzK1g

[tom66]

Re: Philips 37PF9731D/10 - no picture PART2

You do not need to pay to use Scribd, you just have to upload some other document to be able to download that document. You used to be able to use an extension to Firefox and pretend to be an iPhone to get free downloads.

[mcbain]

Re: Philips 37PF9731D/10 - no picture PART2

well i guess this is a dead end for me

[mcbain]

Re: Philips 37PF9731D/10 - no picture PART2

If want to replace the PSU, does anyone know of where i can get new or used PSU model 37platf25w ??

[mcbain]

Re: Philips 37PF9731D/10 - no picture PART2

Here is some more picture of the PSU, this part of the psu i think is the problem

[mcbain]

Re: Philips 37PF9731D/10 - no picture PART2

Volts reading part 1

from main to the logic board.

[mcbain]

Re: Philips 37PF9731D/10 - no picture PART2

Volts reading part 1

from main to the logic board.

Second reading from the other plug to the logic board
seems okey to me.

[tom66]

Re: Philips 37PF9731D/10 - no picture PART2

What are the numbers of those two connectors?