Panasonic TC-P42ST30 14 blinks.

[tw2005]

Re: Panasonic TC-P42ST30 14 blinks.

Just tried that. No blinks.

interesting, so it turned on and voltages were present like Vsus? Would suggest a deeper look at the sn and ss boards.

[Malachi]

Re: Panasonic TC-P42ST30 14 blinks.

What should I do?
I didn't check the voltages after disconnecting the connections I was told to do. Just checked the blinking.

[tw2005]

Re: Panasonic TC-P42ST30 14 blinks.

Put it back together, disconnect ss11 and turn on and see what happens. Just remember not to reconnect that cable straight away or bleed the voltage off

[Malachi]

Re: Panasonic TC-P42ST30 14 blinks.

I'll try that when I get home but if I remember correctly, I tried that last night and still got 14 blinks.
When I connect everything and disconnect sn2, I get 7 blinks.
I'll confirm this afternoon.

[tw2005]

Re: Panasonic TC-P42ST30 14 blinks.

I'll try that when I get home but if I remember correctly, I tried that last night and still got 14 blinks.
When I connect everything and disconnect sn2, I get 7 blinks.
I'll confirm this afternoon.

Points towards SN then I'd think. You say no shorts but if it was P or A then it should have triggered with those alone.

14 with SS removed but SN connected, no 14 with it disconnected, ss connected.

Have you checked any of the IGBTs on the board for shorts like the 30F131?

[tw2005]

Re: Panasonic TC-P42ST30 14 blinks.

What should I do?
I didn't check the voltages after disconnecting the connections I was told to do. Just checked the blinking.

can't hurt to try it again and back probe the p2 or p11 and see if Vsus is up

[Malachi]

Re: Panasonic TC-P42ST30 14 blinks.

Back probe? I don't know which ones the IGTBs are.

[tw2005]

Re: Panasonic TC-P42ST30 14 blinks.

Back probe? I don't know which ones the IGTBs are.

stick your probes into the connector and measure the dc voltage. Most of the large surface mounts are IGBTs, i.e. Transistors and look for the ones which are marked 30f131 as they are common ones to go. Don't know the board but could have RJP30H2 I think also could be shorted.

Failing that, measure the resistance across sn2, it may not be dead short could be low in ohms though.

[Malachi]

Re: Panasonic TC-P42ST30 14 blinks.

Ok, that's how I checked the voltages before but with all boards and connection connected.
You want me to check the voltages with the sn(Ysus) board disconnected from the psu ?

[tw2005]

Re: Panasonic TC-P42ST30 14 blinks.

Ok, that's how I checked the voltages before but with all boards and connection connected.
You want me to check the voltages with the sn(Ysus) board disconnected from the psu ?

If you know the TV was on with that test before no, but if in doubt yes you could measure Vsus because if Vsus is up then the TV is running.

If the TV is running with just the A & P boards then the 14 blink is being caused elsewhere.

[Malachi]

Re: Panasonic TC-P42ST30 14 blinks.

Sn2 reads about 32K ohms.

[Malachi]

Re: Panasonic TC-P42ST30 14 blinks.

With my meter in diode mode, these transistors(?) beep when one lead us in the middle and the other on an outside leg.

[Malachi]

Re: Panasonic TC-P42ST30 14 blinks.

I get 15v on both F15V with the SN board unplugged. It doesn't stay at 15v though.
Relay clicks and it starts dropping.

[Alastair E]

Re: Panasonic TC-P42ST30 14 blinks.

With my meter in diode mode, these transistors(?) beep when one lead us in the middle and the other on an outside leg.

Then those devices are short....

[Malachi]

Re: Panasonic TC-P42ST30 14 blinks.

Figured. I see repair services on eBay for SN boards with 14 blinks. Now I have to decide if it's worth it.

[tw2005]

Re: Panasonic TC-P42ST30 14 blinks.

Sn2 reads about 32K ohms.

definitely wrong, should be hundreds of K to M ohms

With my meter in diode mode, these transistors(?) beep when one lead us in the middle and the other on an outside leg.

The RF.... devices are diodes. Usally once you pull the shorted 30F131 transistors off these will check ok

[Malachi]

Re: Panasonic TC-P42ST30 14 blinks.

I purchased a repair service from eBay. Let's hope that is the problem. If not, I'll have a good SN board to sell. Lol

[Malachi]

Re: Panasonic TC-P42ST30 14 blinks.

Picked up one of these tv's locally that had a cracked screen. I checked the SN board and no shorts that I know how to check so I put it in.
The tv turns on, no blood bling LEDs. Only the right side of the screen works.
Does it look like a bad panel?

[Malachi]

Re: Panasonic TC-P42ST30 14 blinks.

Should I just start trying the other boards?

Also if it is the panel, is it safe to say that the boards are good? Can I part them out? The SN board alone is expensive. I paid $25 for the TV.

[tw2005]

Re: Panasonic TC-P42ST30 14 blinks.

Picked up one of these tv's locally that had a cracked screen. I checked the SN board and no shorts that I know how to check so I put it in.
The tv turns on, no blood bling LEDs. Only the right side of the screen works.
Does it look like a bad panel?

Should I just start trying the other boards?

Also if it is the panel, is it safe to say that the boards are good? Can I part them out? The SN board alone is expensive. I paid $25 for the TV.

Too hard basket for me. Interesting display, looks like a few things could be wrong.

Looks like misaligned panel ribbons on the SN.

bars on the left, no idea.

vertical noisy bar, could be shot panel driver ic on the bottom panel ribbon

Have you checked the C board on that bad side is all connected correctly, nothing left disconnected or tried swapping out with the other c-board?

The boards may be ok for sale but I think I'd want to see them work normally.

SN board is probably the one you'd want to test in a working TV to be sure.