Fault to its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
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Check and replace the damaged component/s at its main board. Contact any service technician. If you wish to get some details; check the site linked here.
SOURCE: Red Blinking Light
These types of problems are allways hard to diagnose.. If you were to power on the set and preform tests, you would think that everything was fine until the moment it shuts off.
Look on the main power board and see if you cant find the thyristor (thermal switch), those are the things that when heated will cause the set to power off for safety reasons.. They are normally placed where ever a large heatsink is. That may give you a location as to the problem and you can put a meter around its 2 pins with the set off and unplugged a couple of min after failure, if its short (0 ohms) thats not the problem, if its open, it triggered the event.
Second, you can run the set for a while and check the voltages and Ve, Va, VCC, Vsetup etc and compair to the markings on the plasma PDP sticker. If you see one is falling down over time (volts will be lost as heat) then you can isolate that portion of the supply.
Third and allways the best way to go about these problems is buy a thermal gun and moniter various spots for heat.
Its just vary hard to say, resistance could be off somewhere, diodes could be overheating as well as fets and caps. Thats why a good thermal gun can point you to exactly where the problem is.
Hope this info helps, but I would suspect the problem is on the main power supply itself and not the y sus and z sus boards side boards.
SOURCE: Toshiba 50HP95 - noise in back of tv and then turned itself off
I would contact guy at
[email protected]
he has great expertise and all parts for Toshiba Plasma TVs
SOURCE: Toshiba 42hp66 has sound but no picture
Part of the power supply is in protect mode. There is most likely a short or something failed on one or more of the boards.
The service rep would swap out boards to locate the fault. Then he would leave the new board(s) in the set, and perform any necessary adjustments.
Take the set in for an estimate before approving repairs. There are many times these sets are not worth serving when they are out of warranty.
Jerry G.
SOURCE: Toshiba 37HLX95 wont power on, just click sound
I have the same problem. It happened once before about 4 years ago just after I bought it. I put a DVD in without the power on. I was able to take it out and it worked fine. This time my daughter put the DVD in, I took it out but still no picture or sound.
Have you had any luck?
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