Philips 52PFL5704D/F7 Sound and Backlight, No Video.

[electronicsurplus]

Re: Philips 52PFL5704D/F7 Sound and Backlight, No Video.

When the ribbons to the panel are removed the same result

Has to be T-Conn shorted somewhere

But, I cannot see where unless it is in the big ICs

[tom66]

Re: Philips 52PFL5704D/F7 Sound and Backlight, No Video.

Probably the T-con or panel. To rule out the panel, disconnect the ribbons going to the panel, leave the T-con plugged in. If it still shows the problem, it's the T-con. If not, it's the panel.

[electronicsurplus]

Re: Philips 52PFL5704D/F7 Sound and Backlight, No Video.

Hey guys, We have the same set

Except when the LVDS cables are plugged into the TCon the set will not power on at all. When removed we get backlight but, obviously no video

Any ideas what exactly may be shorted in this to cause this???

[kevinm34232]

Re: Philips 52PFL5704D/F7 Sound and Backlight, No Video.

T-Cons are hard to find for this one lately.. There are a couple of guys on Ebay that repair them for around $150, replacing the 2 big IC's.

[tibimakai]

Re: Philips 52PFL5704D/F7 Sound and Backlight, No Video.

Mine it worked for a little bit, before overheated.
Yours it still works a bit? If not, then maybe is to late for a fix.

[iridemjewboy]

Re: Philips 52PFL5704D/F7 Sound and Backlight, No Video.

OR the fix would be nice if the TCon is still not avail.
Alan

[iridemjewboy]

Re: Philips 52PFL5704D/F7 Sound and Backlight, No Video.

I too am looking for a Tcon for this model...any advice ?
Thanks, Alan

[jontanner]

Re: Philips 52PFL5704D/F7 Sound and Backlight, No Video.

So, I left the house yesterday and the girlfriend home watching TV, the same 52PFL5704D/F7. Came home after work to watch the tube, and all sound no picture. After turning off and on a few times, I asked her about it. She had watched TV for 6-8 hours then shut it off, went to another room and wanted to have it record in the previous room a few minutes later and when she turned the TV back on, no picture.

So, on to the net I go to find advice and troubleshoot. This forum and thread has convinced me that the TCon board had gotten very hot and something on the board went bad upon her attemptiung to turn the set back on after it had been on for 6-8 hours prior with only a short cool down period.

We are about to be moving tomorrow, so, I won't be able to properly take thinds apart on a bech right away, however I will be needing some guidance if anyone is interested.
Or is there are still some boards out there, I would be interested in purchasing one

Thank You

[Leiny]

Re: Philips 52PFL5704D/F7 Sound and Backlight, No Video.

I found a T-Con board and it is working fine for a week now... I may wind up with an extra T-Con board aswell..

How are you? i have same TV with same problem. I've been looking for a T-Conn board for months. I would really like to buy your extra T-conn board, if its still available? or if you could direct me to where you found yours? thanks,

[Reg9897]

Re: Philips 52PFL5704D/F7 Sound and Backlight, No Video.

I have 2 new tcon boards available if you guys need contact me ohmyemailstuff@gmail.com $130

[tom66]

Re: Philips 52PFL5704D/F7 Sound and Backlight, No Video.

You are right, that one I have already, but I was thinking of using it directly on the processor itself for a very short time.

Black surface is OK it's just reflective surfaces which give errors.

[tibimakai]

Re: Philips 52PFL5704D/F7 Sound and Backlight, No Video.

You are right, that one I have already, but I was thinking of using it directly on the processor itself for a very short time.

[tom66]

Re: Philips 52PFL5704D/F7 Sound and Backlight, No Video.

Be careful with IR temp sensors and metal plates; they read incorrectly due to the shiny-ness. Using a thermocouple would work better.

[tibimakai]

Re: Philips 52PFL5704D/F7 Sound and Backlight, No Video.

You can imagine how hot it gets if it leaves that kind of dark spot on a steel plate? I have ordered a Black and Decker IR temperature gage from Amazon and I will check the temperature when it arrives.
I have found on the two gray pads nylon protective layers which in my opinion shouldn't be there.
It should fit because there are other taller parts in the TV, the T-con sits much lower.
Even with this mod it's still runs very hot. I may end up putting another heatsink next to the other one.
Yesterday I have left it running with the heatsink and no fan at least six hours and it was still running. Turned it off and back on a couple times and it was still OK.

[kevinm34232]

Re: Philips 52PFL5704D/F7 Sound and Backlight, No Video.

Nice... Will the back cover fit though?? Your TV still running OK??

[tibimakai]

Re: Philips 52PFL5704D/F7 Sound and Backlight, No Video.

Here is what I have done. (now at work )
I have to test it out when I'm home.
I have used a bad Intel Atom motherboard CPU's heatsink:

[tibimakai]

Re: Philips 52PFL5704D/F7 Sound and Backlight, No Video.

Kevin, check this out:

[kevinm34232]

Re: Philips 52PFL5704D/F7 Sound and Backlight, No Video.

I wonder if this has any relevance...

[budm]

Re: Philips 52PFL5704D/F7 Sound and Backlight, No Video.

Those Silicone thermal transfer pads are on the ICs to transfer the heat to the shield, they should have used thermal transfer epoxy to glue the good heat sink on top of the ICs instead to get good cooling, if you have Infrared thermal gun to check the temperature of the IC, it will good tools to have.
I did that on one of the T-CON board and got it to last for about a year before board died. The pictures were rolling after T-CON warm up.
http://s807.photobucket.com/albums/y...%20LTV-32W3HD/

[kevinm34232]

Re: Philips 52PFL5704D/F7 Sound and Backlight, No Video.

It definetely is hot on that T-Con shield, I'm glad I put that back on when I noticed how warm the IC's were getting. But it doesn't seem consistent with mine at least or yours tibimakai that heat was causing the intermittent problem as I had the set off for days and it still didn't work.