Panasonic TC-P50X3 14 Blinks.

[xxsuperstreetxx]

Hi guys, my tv will click three times when plugged in, then will result in a 14 blink code. 14 blinks is defined as: "14 blinks -> Loss of F15V from P bd. P6/pin 10 or A Bd detection."

Here is the diagram of the tv internals

I am a novice at repairing plasma tvs, and do not have a volt meter. Checked physical connections from P6 to A6 and seemed fine. Wondering if trying to change the main board is the best bet.

Also I have a tc-p50x5 with a cracked panel (Panasonic MD50H14C1A Display part number). The internals are different than the x3, but I am wondering if the panels would be compatible (Part #: MD50H15C1A).

[tw2005]

Re: Panasonic TC-P50X3 14 Blinks.

may get away with it if the board holes will mount up to the panel. have you checked out the SN and Ss boards for shorts though? Not sure about the x3 but in the FHD models 14 blinks is quite often shorted SC(SN) board.

Not having a multimeter is a hinderance though.

you could try this. disconnect the following with the Tv off.

SN2, SS11, P35, the 3 white ribbons at the A board A23,33,34.

Now turn Tv on and see if it will stay on and no error blinks. If so , turn it off. Do not reconnect anything for at least 5-10mins as voltage will still be present on the power leads from the P-board which can damage the boards and the panel(P35)

if it passed that test then I'd expect the SN or SS is shorted. If still 14 blinks, well it'd be A or P

[xxsuperstreetxx]

Re: Panasonic TC-P50X3 14 Blinks.

Thanks for the reply. I did what you described to isolate the power supply and main board from the rest of the components. Same error code, indicating it must be one of these two boards. Based on panasonic's repair guide the cpu on the main board might be the problem (see pic). I am thinking of heating up some the chips in an attempt to "reflow" any solders that might have cracked. Maybe this will fix the problem as no visible issues can be seen. I don't have anything to lose as i can't find a replacement board for this tv and they are $150 if in stock.

[xxsuperstreetxx]

Re: Panasonic TC-P50X3 14 Blinks.

Any idea what chip could be the standby cpu rom? (there are two chips under the heat sink).

[Terryfictv]

Re: Panasonic TC-P50X3 14 Blinks.

Not having a multi-meter is a hindrance though.

Best thing to do is buy a simple multi-meter for $20.00 !
Then proceed.......

[tom66]

Re: Panasonic TC-P50X3 14 Blinks.

14 blinks is not usually main board. it's usually something shorted tripping main board fault but very rarely is main at fault.