Panasonic TC-P42S30 issues

[SCITOMMY]

Re: Panasonic TC-P42S30 issues

do you have a manual? try service mode, then you can either try test patterns or I'd be tempted to try the mirror option and flip the display vertically and see if top goes black and bottom has that messed up display.

on these a dead short on the Vsus at power up does not produce a blink but a solid led.

It is possible to have a fault yet no codes as well, I've managed to create that situation on my TV.

section 6 are the instructions.

I had the same exact problem. I had a solid red light as well. I had a short(s) on the SN board. I was told before I found out the problem, that a solid red light could most definitely be a shorted component (as was in my case), but that the screen cannot show any signs of a picture or any dimm for that matter. Also, the Tv is non-functionable. (Remote and all buttons do nothing).

[SCITOMMY]

Re: Panasonic TC-P42S30 issues

The 1st thing I was told when I had a solid red LED light (with no picture at all and no TV or remote functions) was to troubleshoot to get a blinking light.

1. I held down the power botton (on TV) for 10 seconds, let go and got a 14 blink code.

2. I disconnected the SN board from the power supply, powered the TV and I got a 7 blink code.

That let me know I have a problem with the SN board. Which I did.

[SCITOMMY]

Re: Panasonic TC-P42S30 issues

i tried that. same result. i wonder if there could be an issue with the a-board as well since its not producing a blink code.

I don't know if it's the A-board or not, but this kid shows his problem with his A-Board and the symptoms.

http://www.youtube.com/watch?v=K5OPzlw9YZ0

It looks like his TV was working normally, but with some colored lines during normal viewing.

[tw2005]

Re: Panasonic TC-P42S30 issues

I'm not quite sure what your point is. I'm referring purely to the display on Ccalxr's TV.

That video, most definitely A board without a doubt, as far as this one goes I'm thinking Sn board and maybe the buffer section has failed but not enough to shut it down, not yet at least.

By trying the service mode and mirror if what is being displayed flips then you could start thinking A board because that would potentially prove the lower section of the buffers are working and the a is generating garbage.

If it remains unchanged then it would be a panel drive issue I reckon.

Always good to confirm the voltages are correct too but usually if they were out enough that would trip an SOS.

[SCITOMMY]

Re: Panasonic TC-P42S30 issues

on these a dead short on the Vsus at power up does not produce a blink but a solid led.

True. He is getting a solid red LED light, which could be a short on the Vsus.

I was just trying to add that in my case that's exactly what my problem was, but I had no picture at all (completely black) and no TV functions at all (no buttons worked on TV or remote).

He does have something on display, not sure if his TV functions at all though.

I doubt he has a shorted Vsus (short on SN board) like I had. That's all I was trying to say.

[tw2005]

Re: Panasonic TC-P42S30 issues

True. He is getting a solid red LED light, which could be a short on the Vsus.

I was just trying to add that in my case that's exactly what my problem was, but I had no picture at all (completely black) and no TV functions at all (no buttons worked on TV or remote).

He does have something on display, not sure if his TV functions at all though.

I doubt he has a shorted Vsus (short on SN board) like I had. That's all I was trying to say.

He has sound so I expect he'll have control of the TV, it's a little unusual what he has, that's what i enjoy about these forums. Every once in a while you see something different which is great for learning.

Ccalxr definitely does not have a shorted Vsus or he'd be in the same boat as you. the TV is running without SOS codes being generated. The led is solid when it's running too but for you the giveaway was you had no control and then the forced SOS14.

It'd be a tough call to suggest that repair kit for this unless you find some shorted transistors or at least the 30f131.

[SCITOMMY]

Re: Panasonic TC-P42S30 issues

Yeah, I was just trying to limit his problem by excluding what my problem was

It's the only troubleshooting I know, the ones I have already done.


I'm not sure if a faulty IC on the SN board can go without it shorting or giving an error code. It seems unlikely given the strict nature to trigger a locked mode on this TV model.

I know on older Plasma sets, you could troubleshoot until the thing blew up, but not on the newer Panasonics.

[tw2005]

Re: Panasonic TC-P42S30 issues

Can't wait to see how it ends, but for an example of a bad ic yet on and no blinks, the octal buffer IC that the data signals pass though. I've had one produce SOS7 and a primed panel with sound no blinks. That I discovered rebuilding the Sc for my Tv. I was scavanging the parts from other boards otherwise I would have no idea except i produced those results myself.

It was a good learning experience and the joys of component level.

[SCITOMMY]

Re: Panasonic TC-P42S30 issues

Can't wait to see how it ends, but for an example of a bad ic yet on and no blinks, the octal buffer IC that the data signals pass though. I've had one produce SOS7 and a primed panel with sound no blinks. That I discovered rebuilding the Sc for my Tv. I was scavanging the parts from other boards otherwise I would have no idea except i produced those results myself.

It was a good learning experience and the joys of component level.

Nice. What part of Australia are you located? I really enjoy Tennis and the AO is my favorite to watch. I never travel, but if I did, my first trip would be to Melbourne for the Open.

[tw2005]

Re: Panasonic TC-P42S30 issues

Top End where the Crocs are. Darwin

[Ccalxr]

Re: Panasonic TC-P42S30 issues

Can you turn the TV off and on with the remote?

Have you tried holding down the power button for 10 seconds on the TV? Any blink code after that?

My next step would be pull out the P2 and P11 connectors on the Power Supply, power up the TV and see if you get a blinking light.

I can turn the tv on and off with the remote. with P2 and P11 unplugged it throws 7 blinks. It also throws 7 blinks with SN2 and SN20 unplugged. Holding down the power button for 10 sec does not produce any blink codes.

[Ccalxr]

Re: Panasonic TC-P42S30 issues

I'm not quite sure what your point is. I'm referring purely to the display on Ccalxr's TV.

That video, most definitely A board without a doubt, as far as this one goes I'm thinking Sn board and maybe the buffer section has failed but not enough to shut it down, not yet at least.

By trying the service mode and mirror if what is being displayed flips then you could start thinking A board because that would potentially prove the lower section of the buffers are working and the a is generating garbage.

If it remains unchanged then it would be a panel drive issue I reckon.

Always good to confirm the voltages are correct too but usually if they were out enough that would trip an SOS.

yeah tw2005, i was thinking the buffer chips as well just because the lines in the tv are inside of horizontal bar across the tv that do move from the top of the screen to the middle to the bottom... when the tv is first turned on, the top portion of the screen shows up first, just like if it were working normally you know how the channel number and time and channel info show up in that grey bar then it disappears? then the lines move to the center of the screen as if it were going to regular picture. does that make sense?

[Ccalxr]

Re: Panasonic TC-P42S30 issues

here is a short video of the tv so you have an idea of what im talking about as far as its symptoms.

https://www.youtube.com/watch?v=7kIB...ature=youtu.be

[SCITOMMY]

Re: Panasonic TC-P42S30 issues

In my very inexperienced opinion, if your new SN board doesn't work, it is a bad panel.

With the SN2 unplugged I got 7 blinks as well.

However, with the SN2 and SN20 unplugged, I got an 8 blink code. I think you should get something other than 7 blinks (I think 6 or 8) if the SN board is at fault.

I doubt it's the SN board at this point. It's either the A or Panel IMO. More likely the Panel. That looks messed up in the video. If it was the A-board, I don't think it would be that messed up.

I'm just trying to give you my honest inexperienced opinion. I'm in no way a professional or authority like many others on this forum. I am probably wrong, but I do like to help if I have an idea.

[Ccalxr]

Re: Panasonic TC-P42S30 issues

i agree with you there. because of my odd ball situation with this tv i ordered the new board just because i figured it was worth shot. i do agree that if not then its likely the panel but with these tv's even a faulty panel would make it kick a blink code. well ill know in a couple of days anyway.

[Porky1]

Re: Panasonic TC-P42S30 issues

You guys are really helpful and I appreciate it as you dope out this problem. I have something similar but I show a dead short to ground on the SN board. I have no picture, no sound and a solid red light. When I disconnect the SN, I get seven flashes. The diagnostic manual leads me to replacing or fixing the SN board. Any thoughts?

[Ccalxr]

Re: Panasonic TC-P42S30 issues

Ok, so I got the new board in (its actually a refurb board) and now when I turn the tv on it does nothing. the red light on front comes on and stays on, no blinks. nothing shows up on the screen at all. I am not able to turn it off though. With the original board I was able to turn the tv on and off but had the lines all over the screen. Any ideas? This is odd

[tw2005]

Re: Panasonic TC-P42S30 issues

Ok, so I got the new board in (its actually a refurb board) and now when I turn the tv on it does nothing. the red light on front comes on and stays on, no blinks. nothing shows up on the screen at all. I am not able to turn it off though. With the original board I was able to turn the tv on and off but had the lines all over the screen. Any ideas? This is odd

So we're talking about a SN replacement? Sounds like it could be dud. Check the new board at SN2 for dead short. Solid LED not turning on or blinks sounds like the condition with shorted Vsus at startup.

Or you could disconnect this new board and see if you regain control of the TV and blink codes which may be SOS8 with the SN removed.

[Ccalxr]

Re: Panasonic TC-P42S30 issues

with the new sn board, i get 7 blinks with sn2 unplugged. i get solid red light but no pic and cant turn off with sn20 uplugged. i get 8 blinks with both sn2 and sn20 unplugged.

[SCITOMMY]

Re: Panasonic TC-P42S30 issues

With your new SN board, you are getting the exact symptoms I had. You most likely have a short somewhere on the SN board. In my case it was 4 mosfets.

You most likely recieved a faulty board and not the cause of some other board shorting it out, because your old one fires up fine.

I would try to get a refund or send it back.

It seems your 1st SN board has no shorts, but possibly a faulty IC buffer or the problem is not the SN board at all, but an A-board or panel problem.