55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

[joedisorder]

Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

So I took the board off and cleaned it up, the back looked like it had sticky shit all over it. Yes thats how I received it, didn't notice that until I took it off this time. Yes I'm stupid and should have noticed it before hand, however after I cleaned it with some rubbing alcohol, I powered it back on and get an LED trying to light up on the SC board followed by a weird beep, then the 6 light code again. So to test to see if it was fully powered down I tried the usb ports to charge my phone, because I didn't see a light on the SS board. Didnt charge. However before powering the TV on I did see it try to connect to my phone. About to test with multimeter, give the readings in a few.

[tw2005]

Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

So I took the board off and cleaned it up, the back looked like it had sticky shit all over it. Yes thats how I received it, didn't notice that until I took it off this time. Yes I'm stupid and should have noticed it before hand, however after I cleaned it with some rubbing alcohol, I powered it back on and get an LED trying to light up on the SC board followed by a weird beep, then the 6 light code again. So to test to see if it was fully powered down I tried the usb ports to charge my phone, because I didn't see a light on the SS board. Didnt charge. However before powering the TV on I did see it try to connect to my phone. About to test with multimeter, give the readings in a few.

There probably is not one on the SS, sometimes there is. Weird beep is because something is shorted. The sticky stuff is conformal coating, there to preserve and protect from the elements, moisture, dust, etc. i would have left that and has no bearing on your issue.

I would not keep trying powering the SC board, you may get unlucky and cause more damage.

The SC board is dead in my books.

[joedisorder]

Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

Thank you sir for your help. Tested using meter and I believe you're correct already started the return process. Have another board supposedly brand new coming from another supplier but its backordered and expect shipment around the 8th of Oct.

[tw2005]

Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

Thank you sir for your help. Tested using meter and I believe you're correct already started the return process. Have another board supposedly brand new coming from another supplier but its backordered and expect shipment around the 8th of Oct.

Sounds promising. Good luck.

[Ketchup]

Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

Went and tested my SC board (SC20 2pin beeps) and found that the multimeter will beep on all of the ones that I've marked with silver, when probing pins 1+3 on the component.

When ground is the High Voltage plate: D641, 642, 643 beeps as well

With the normal ground, everything else that is marked beeps.

That's 16 components that beep when tested, am I doing this right?

[tw2005]

Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

Depends on the meter and what exactly it's doing and reading assuming we're talking diode mode. My fluke will give a short beep testing diodes and a reading.

A constant beep and a low reading would be bad. i don't see Sc20 in the shot so I'm not sure what you're on about but there's probably 30 pins or so on that one so what exactly are you testing on that?

What situation are you in? Is this a confirmed bad Sc board and you're trying to repair it or are you simply trying to establish if it's bad or not? what's your TV doing

[Ketchup]

Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

Depends on the meter and what exactly it's doing and reading assuming we're talking diode mode. My fluke will give a short beep testing diodes and a reading.

A constant beep and a low reading would be bad. i don't see Sc20 in the shot so I'm not sure what you're on about but there's probably 30 pins or so on that one so what exactly are you testing on that?

What situation are you in? Is this a confirmed bad Sc board and you're trying to repair it or are you simply trying to establish if it's bad or not? what's your TV doing

TPNA5335BK

I am getting 7 blinks. Unplugged the SU + SD boards (no shorts noted at the buffers of SU/SD) and connected the jumper @ SC50? and still got 7 blinks. Figured the SC board is bad. Removed the SC board and upon checking for shorts, I am getting the constant beep at all of the marked components.

I first test each component at pins 1 and 3 (out of the three pins), then I test it from ground to pin 1,2,3.

When. I use the "Danger H.V." Plate as ground, D461,462,463 will constantly beep at all three pins on each.

I am trying to figure out which components need to be replaced and if I am going about it correctly.

[tw2005]

Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

I would keep it to simply this. on the SMD "D" devices the outer legs are the same connection . So outer -- outer will be short, center - outer should not be dead short.

probe center to both outer pins

Keep in mind this is in cct and other devices like the transistors are connected to it, so it may read short but a shorted transistor will also make the diode show short.

For the transistors "Q" . probe all 2 pin combinations of the 3 pins and see if dead short but watch out for low reading, may not go dead short . You could use resistance, I expect at least K ohms, 100's of ohms I would think is bad.

Some guys have repaired these boards now and ModuslinkPTS offer a rebuild service which usually is reasonably priced

[tw2005]

Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

Also Shopjimmy do a kit, that may give some clues to what fails but I see a FET driver IC and tiny SMD 5pin pnp/npn dual transistor, tiny smd resistors plus the bigger stuff.

What experience in doing soldering and SMD work do you have?

http://www.shopjimmy.com/panasonic-t...repair-kit.htm

$30

Kit Includes
Description Quantity
Transistors 7
Resistors 6
Diodes 2
Integrated Circuits 1

[tw2005]

Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

If you get onto http://www.moduslinkptstvboards.com/TXNSC1NVUUB/

and check out by 09 November, which today is here in Australia, you'll get it repaired for $78 less 30% about $55 !

I assume these boards are rare so consider if you fail plus if the board is damaged i.e. you tear the tracks etc you may end up with a very difficult and expensive repair.

[Ketchup]

Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

If you get onto http://www.moduslinkptstvboards.com/TXNSC1NVUUB/

and check out by 09 November, which today is here in Australia, you'll get it repaired for $78 less 30% about $55 !

I assume these boards are rare so consider if you fail plus if the board is damaged i.e. you tear the tracks etc you may end up with a very difficult and expensive repair.

Packaged and ready to go!




Thanks again

[tw2005]

Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

Packaged and ready to go!




Thanks again

I can see it must have been a tough decision

make sure you come back with the final result and feedback on their service.

I have heard there have been delays due to parts recently. I forget but have you checked the SD/SU boards for shorts? that would be a good idea if not just in case because if they've shorted too they can/will blow up the Sc board

[patrickirvin]

Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

I have a 55 inch Plasma Viera Panasonic Model TC-P55GT31 with 7 blink problem - When SC board is disconnected I get 8 blinks. I have tested the continuity of the SC board and it is good - not sure how to test further. I see that 8 blinks is the S-SUS BOARD TNPA5331 board but is that when everything is connected? I am not sure how to proceed to narrown down culprit between SC SD SU or SS boards?

Thank you for your help!

[tw2005]

Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

I have a 55 inch Plasma Viera Panasonic Model TC-P55GT31 with 7 blink problem - When SC board is disconnected I get 8 blinks. I have tested the continuity of the SC board and it is good - not sure how to test further. I see that 8 blinks is the S-SUS BOARD TNPA5331 board but is that when everything is connected? I am not sure how to proceed to narrown down culprit between SC SD SU or SS boards?

Thank you for your help!

The information is contained within this thread for the SD/SU isolation Sc board test.

have everything connected normally then do the following (TV off)

1. Remove the 4 VFG (gnd) screws from the SD/ SU boards

2. Remove 3 connectors SC46/SD46, SC42/SD42, SC41/SU41

3. Install the SC50 Jig or just jump pins 1 and 2 of
connector SC50 on the SC board.

Turn the TV on as normal, observe the front LED.

If it turns on normally no blinks and the green onboard LED on the SC is lit (confirming the TV is on and running) then the SC is good.

7 blink will be either SD, SU or both boards.

If still 7 blink, SC is bad , SD/SU boards still need testing for shorts. There's probably a guide and or manual uploaded somewhere within in this thread

[hoptown101]

Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

I too have a TC-P55GT31 that had the 7 blinking lights. I sent my SC, SD and SU boards to Moduslink based on what I had read and thought was wrong. I just finished putting the boards back in and still have 7 blinking lights. If I unplug the ribbon cable and the 2 wire plug to the SC board I get 8 blinking lights just as I had before. Obviously my diagnosis was wrong so what do I need to check next?

[tw2005]

Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

I too have a TC-P55GT31 that had the 7 blinking lights. I sent my SC, SD and SU boards to Moduslink based on what I had read and thought was wrong. I just finished putting the boards back in and still have 7 blinking lights. If I unplug the ribbon cable and the 2 wire plug to the SC board I get 8 blinking lights just as I had before. Obviously my diagnosis was wrong so what do I need to check next?

I'd contact modus. they have a wty. 7 blink will be SC/SD/SU boards. maybe they missed something?

Or You can connect the SC on it's own, jumper SC50 pins together and power on. If it turns on with no blinks then it's the buffer boards.

before you power on, make sure the buffers are disconnected from the Sc and the 4 gnd screws removed from the buffers or better still leave them out completely.

If it still blinks 7, then contact modus

[hoptown101]

Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

I'd contact modus. they have a wty. 7 blink will be SC/SD/SU boards. maybe they missed something?

Or You can connect the SC on it's own, jumper SC50 pins together and power on. If it turns on with no blinks then it's the buffer boards.

before you power on, make sure the buffers are disconnected from the Sc and the 4 gnd screws removed from the buffers or better still leave them out completely.

If it still blinks 7, then contact modus

I tried that and now the green light on the SC board comes on and the power button stopped flashing. It has to be the SD or SU board doesn't it, or am I missing something else? I checked continuity across my ground screws and that seemed fine...at least to me. I'm learning as I go here so all help is appreciated. I guess the next move is to contact Modus unless somebody has any other ideas

[patrickirvin]

Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

After narrowing it down to my SC card I sent all three to David at Quad City Electronics in CA - extremely quick testing and repaired board - works perfectly now. 661-254-3003 or ebay user brevga - grreat service!

[freakaftr8]

Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

If it's any help. I have this tv and along with finding the usual suspects shorted on the sc board I also found a shorted buffer ic. Replaced all components and all is well.
So ic shorts on buffer and takes sc with it.

[hoptown101]

Re: 55 inch Plasma Viera (VIERA TC-P55GT30) not turning on. 7 blinking red lights.

I have a picture again so the boards are fixed and we're making progress. Are there any tricks to getting the ribbon cables seated properly and how tough are those things? I feel like I'm going to tear them up tugging on them. I've tried reseating a couple of them 3 or 4 times with no luck.