Question about Toshiba 50HP81 50 in. Plasma Television
I recently purchased a used Toshiba 50HP81 and it worked when I got it home. I was using it for about 45 minutes the first day and everything was fine and the picture quality was outstanding. The second day when i powered it on, red pixels came up in the bottom left of the screen and eventually the full picture came on after about 5 minutes of messing with the hd cables (which i realize had nothing to do with it). The picture since then has not stayed on for more than 15 minutes or so at a time before dissolving the pictures to black and having no visuals for about 3-5 minutes then repeating. The power/standby light does not blink indicating any errors. I'm thinking maybe there is something circuitry related and not screen related, but im new to plasmas and don't know too much. I would be able to replace resistors/amps inside if that was the case, but I'm not sure how to figure that out. Any help would be great, thanks.
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Posted on Jan 02, 2017
Not yet. When I find the time I plan to try and switch out the power supply/jack in the back of the machine. I am hoping it is just a matter of a faulty connection. Thanks for asking.
Posted on Dec 18, 2007
Mark F K, truong808, does the cooling fan(s) blow or come on? If not, the system will sense tha ti is overheating and will shut down to prevent further damage. Also, a thermal sensor may be failing on the Mobo and thus keep the fan from initiating. The cheapest fix is to replace the fan. Worst case scenario is another Mobo may be the fix.
Posted on Jan 07, 2008
SOURCE: toshiba 42HP66, HDMI problems
Your Cable box might need to be reprogrammed. Call the cable company and they will drive you thru the steps to program it, this way you will get the channels. This process might take you 30-45 minutes.
Posted on Jul 12, 2008
Had the same problem myself. Took some doing but I managed to find a service bulletin that I downloaded. The problem is with the siene module and all you need to do is unplug connector JP63A from the main board and your TV will work again.
Take the back off the TV (there are a lot of screws) and look on the left hand side of the main circuit board that is mounted in the center of the TV. You will see a small white connector that is labelled JP63A, simply unplug it. Plug the TV back in and let it reboot. That's it, should be able to watch immediately.
Posted on Mar 15, 2009
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