Panasonic TC-P65VT30 Click Click Click

[dzp1]

Hi all,

So after a lot of storms this weekend, I came down to the basement to hear my 'man-cave' TV (purchased Feb 2012) clicking on and off non stop (just the relays).

I've been reading these forums since Monday and have started the troubleshooting process. At this point, I've come to the step where it is telling me to replace the A-board. A-boards for this model are seemingly impossible to find and I'm wondering if I should even try using the TC-P55VT30 board? The part number for the board I need is suffix AB and the 55 VT board is NIL. Can I buy the NIL board and jumper the one shunted resistor to make it an AB board?

A-board model needed: TNPH0913 (2)A AB
A-board model on Ebay: TNPH0913 (2) A NIL

Thanks for the advice and help!

Scott

[Moreno83]

Re: Panasonic TC-P65VT30 Click Click Click

How do you know for sure its the mainboard? How many times is the led blinking?

Did other things like for example playstation/HD receiver die to or just the tv?

[dzp1]

Re: Panasonic TC-P65VT30 Click Click Click

Moreno,

I followed the troubleshooting guides referenced on here. But I guess I'm not 100% certain.

More background/info:

Upon plugging the tv in, two relay clicks. By doing nothing, two more relay clicks 33 seconds later. Then this sequence repeats immediately - click click, 33 seconds, click click, 0.5 seconds, click click, 33 seconds, click click, etc. During this sequence, the optical audio audio lights up for about the first second of the 33 second gap.

The remote is unresponsive at all times.

If I press the power button, the red light will come on and stay solid. The backlight tries to come on at that point and the LEDs on the SS and SC boards light. The power button sometimes needs to be held down.

The upstream Denon receiver (only input source to this TV) no longer passes HDMI video as well. This happened at the same time.

Hopefully some of this helps and let me know what else I can provide you. I'll be back in front of the set in a few hours.

Thanks!

[Moreno83]

Re: Panasonic TC-P65VT30 Click Click Click

Ok , not sure if the american models stay red when they are fully on.

Leds on the ss and sc stay on or? What happens if you keep pressing the power button on the remote?

[dzp1]

Re: Panasonic TC-P65VT30 Click Click Click

The LEDs on SS and sc only come on if I hold the power button on the front down for about four seconds, then let go. Red power led turns on and the sc and SS LEDs turn on a second after. Then once the cycle time is up, the thing resets with the relay clicks and the SS and sc LEDs turn off but the power led stays on solid. If I hold the power button down on the front again, th red led will go off upon release after about four seconds. The remote does nothing.

[Moreno83]

Re: Panasonic TC-P65VT30 Click Click Click

That indeed looks like a bad mainboard. With a bad powersupply then the SS/SC board would not come on because the mainboard would have detected a problem on the power supply.

What happens if you disconnect SC20/P11 connector? ( Remove SC board cables ).

Still same symptoms?

[dzp1]

Re: Panasonic TC-P65VT30 Click Click Click

Yep, same symptoms!

Is there a possibility the board from a 55" VT30 would work on the 65" VT30? The part numbers are the same, but the Suffix is different - NIL (no resistors) is available, but mine is AB (one resistor). Can I solder a resistor on the NIL board to make it an AB board?

[Moreno83]

Re: Panasonic TC-P65VT30 Click Click Click

Yes that will probably work! It might even work without the resistors.

Worst case scenario is that the mainboard wont turn on the tv or shuts down with a blink code.

[dzp1]

Re: Panasonic TC-P65VT30 Click Click Click

Worth a shot! I will report back once the 55" board shows up.

Thanks for the help!

[tw2005]

Re: Panasonic TC-P65VT30 Click Click Click

Worth a shot! I will report back once the 55" board shows up.

Thanks for the help!

Those jumpers are not part of any cct. All you'd need to do is get a copy of both service manuals, compare the eeproms and swap over the ones that are 65" specific and it will do the same job.

If you swap all of the 8 pin ones you should end up with the same board plus settings and hours will transfer

[tw2005]

Re: Panasonic TC-P65VT30 Click Click Click

these are the chips on the 65


TVRS054S
TVRS300S
TVRS061S
TVRS035AMS

these are the 55

you can see 2 differ


TVRS065S ic9304
TVRS061S
TVRS053S ic8902
TVRS035S

found this in page 10 of the 55 manual

5 Technical Descriptions
5.1. Specification of KEY for DTCP-IP, WMDRM and Widevine
5.1.1. General information:
1. EEPROM (IC8902) for spare parts has the seed of KEY for each DTCP-IP for DLNA, WMDRM for Netflix and Widevine for
CinemaNow.
2. The final KEY data will be generated by Peaks IC (IC8000) when SELF CHECK was done and are stored in both Peaks IC
(IC8000) and EEPROM (IC8902).
5.1.2. Replacement of ICs:
When Peaks IC is replaced, EEPROM should be also replaced with new one the same time.
When EEPROM is replaced, Peaks IC is not necessary to be replaced the same time.
After the replacement of IC, SELF CHECK should be done to generate the final KEY data.
How to SELF CHECK: While pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for
more than 3 seconds.
TV will be forced to the factory shipment setting after this SELF CHECK.

[dzp1]

Re: Panasonic TC-P65VT30 Click Click Click

So this is pointing to the 55 board not working on the 65 tv without some fairly in depth changes, right? May be worth trying to cancel the 55" board order unless I'm reading your post incorrectly. I'll call moduslink today and see if they repair A boards.

Thanks for the help!

[tw2005]

Re: Panasonic TC-P65VT30 Click Click Click

So this is pointing to the 55 board not working on the 65 tv without some fairly in depth changes, right? May be worth trying to cancel the 55" board order unless I'm reading your post incorrectly. I'll call moduslink today and see if they repair A boards.

Thanks for the help!

Well it may not display correctly but I don't think swapping 2 ics and a self check is that in depth unless you don't have the tools or experience I guess.


All depends on what the cost of that board is compared to a modus rebuild and what amount of risk you can accept.

[dzp1]

Re: Panasonic TC-P65VT30 Click Click Click

Well it may not display correctly but I don't think swapping 2 ics and a self check is that in depth unless you don't have the tools or experience I guess.


All depends on what the cost of that board is compared to a modus rebuild and what amount of risk you can accept.

You don't think I would need to swap out IC8900 either? The numbers are different there too.

The cost of the three new ICs is about $60. The ICs appear to be under the heat sink, so I may pay the $95 to have modus rebuild it while I wait for the 55" A board to show up. I'll probably do both since I already bought the other A board.

You agree on the problem being most likely the A board?

[tw2005]

Re: Panasonic TC-P65VT30 Click Click Click

You don't think I would need to swap out IC8900 either? The numbers are different there too.

The cost of the three new ICs is about $60. The ICs appear to be under the heat sink, so I may pay the $95 to have modus rebuild it while I wait for the 55" A board to show up. I'll probably do both since I already bought the other A board.

You agree on the problem being most likely the A board?

Sure sounds like it, plus you have another device with HDMI issues which was connected to this and it's a fairly common thing to have a surge go through the HDMI and take out these boards.

And no that ic8900 will be fine. I never said purchase new chips, just take them off the bad board and put them on the other. They probably are under those heatsinks.

But $95 is a cheap price for the A board repair, probably lucky to get a used one for that.

I think that would be a good option plus wty.

Top of the range PDP and 65", worth every penny of that.

[dzp1]

Re: Panasonic TC-P65VT30 Click Click Click

Sure sounds like it, plus you have another device with HDMI issues which was connected to this and it's a fairly common thing to have a surge go through the HDMI and take out these boards.

And no that ic8900 will be fine. I never said purchase new chips, just take them off the bad board and put them on the other. They probably are under those heatsinks.

But $95 is a cheap price for the A board repair, probably lucky to get a used one for that.

I think that would be a good option plus wty.

Top of the range PDP and 65", worth every penny of that.

IC8900 is huge, so that's great news! LOL

I think I'm going to do both and see if it works. I'll order the two chips (IC8902 & IC9304) for under $30 and see if I can't get both boards working. I don't know how big those two chips are, so hopefully not massive.

[tw2005]

Re: Panasonic TC-P65VT30 Click Click Click

IC8900 is huge, so that's great news! LOL

I think I'm going to do both and see if it works. I'll order the two chips (IC8902 & IC9304) for under $30 and see if I can't get both boards working. I don't know how big those two chips are, so hopefully not massive.

where from? Encompass shows one as no longer available and do you know which is in which location? I don't. I would be assuming/guessing ic8902 is TVRS054S

They will be 8 pin. If someone had an eeprom reader/writer with a clip so you can read/write from it on the board you could copy the data on the original 55" chips and save to a file, then copy/write the data from the 65" across

[dzp1]

Re: Panasonic TC-P65VT30 Click Click Click

where from? Encompass shows one as no longer available and do you know which is in which location? I don't. I would be assuming/guessing ic8902 is TVRS054S

They will be 8 pin. If someone had an eeprom reader/writer with a clip so you can read/write from it on the board you could copy the data on the original 55" chips and save to a file, then copy/write the data from the 65" across

Sears Parts Direct is showing the two chips as in stock. I do not have access to an EEPROM reader - been a while since I've done that, but that would clearly be the easiest.

[Moreno83]

Re: Panasonic TC-P65VT30 Click Click Click

Hope you get it working and sorry i was wrong on the mainboard. I was pretty sure that that would work.

[dzp1]

Re: Panasonic TC-P65VT30 Click Click Click

Hope you get it working and sorry i was wrong on the mainboard. I was pretty sure that that would work.

No worries at all! I was going to buy that other board anyway and try it for $100