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Panasonic viera 50" plasma TH-50PZ85X shuts off after 2 hours

No blinking red lights, unplugged wall outlet for the night and it works again the next day for another 2 hours

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No error code is being triggered, If you are using a box do not forget when you remove power to the TV also remove power for box and set at same time, other than that may be a main board issue.

Me I would to rule crazy things out disconnect everything going to the set except a DVD player and sit back and see when it fails, I am just wondering if something coming in is not triggering this, these sets have pretty good detection and if shut down show a error most of time.

Not sure if any of this will help but felt you deserved some thoughts at least.

Posted on Dec 11, 2012

  • fabien.rebuffel Dec 11, 2012

    hello SD tech, and thank you for your fast answer. i tried all of this. i have a panasonic SA PT 460 conected to my screen with HDMI for DVDs on HDMI 1, then i have a PS3 conected also with HDMI on HDMI 2, and for the digital sound i use an optical fiber cable from PS3 to SA PT 460 , that is it. it feels wierd to me that besides the ps3 a home cinema (SA PT460) would create a problem knowing that i used this same set up for about 4 years now... what i should say is that i live in DR wich as tons of power shut downs and other surges almost 3 to 4 times a week, wich is hard to handle for any electronic sets. now, since everything is working fine for at least 2 hours everyday :D (ridicoulous), i thaught maybe it could be a faulty capacitor or transistor or even resistance would be the problem, i opened the back panel cleaned every single things very good till the point that there is absolutely no dust nowhere. left the panel open just in case of overheating issues. i don't have test tools to check my capacitors or resistances but they don't look swollen or burnt, i know it doesn't mean they are ok. anyways thanks for your answer hope to find a solution this is getting on my nerves a little :), hope it's not a board to change cause putting 200$ -300$ to change a component on a 900$ valued plasma from 2008 is a little harsh, i hope to find answers, take care.

  • fabien.rebuffel Dec 12, 2012

    update on my plasma screen: did a hard reset on the screen (-vol control on screen + menu for 3 sec and unplug outlet to finish process), big thanks for your advice SD Tech because the fact of just plugging only my PS3 in HDMI 1 (i use sound through the optical fiber, so nothing else is conected) after the hard reset, its now 1 in the morning here and i've played games and watch a bluray as tests, did my image set up again, and the set is still working ! the set use to last 2 hours tops. now it's been 4 hours it's running. hope it stays that way. thank you SD Tech, it's nice to see people, without even meeting them, contributing to help others on this very helpfull and cool site, FOR FREE!



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SOURCE: Panasonic TH-50PZ80U tv, error- 2 blinks

1. Reseating the connector P25 may solve the problem. If it does not.
2. Unplug the unit andd disconnect the connectors A5, A6, and A7. Apply power to the TV. If a White screen comes up and all voltages check normal, replace the P board.
3. If the TV stays on after isolating the SC board, then replace the SC board and the D board; it is likely that the fuse on the D board is blown.

Posted on Dec 06, 2009

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