My toshiba 62hm15a tv has a problem. First there started being like hot spots on bright areas on peoples faces etc. Like something wasn't regulating where there was more light on the screen. Then it started having bright flashes across the screen, the bulb was on low and when I turned it to high the flashing stopped for several months. Then it got worse and the flashing starting to include like horizontal lines when it flashed. Could you tell me what is going out on this thing? The lamp "looks" ok still. Thanks
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Plasma sets use high voltage to produce their displays and it sounds very much like the HV supply is losing (or has lost) regulation likely due to the impending failure of a semiconductor.Check to see if Toshiba has any extended warranty on this since it could be a series problem.If there is none, ask for a price on a new or repaired supply on an exchange basis.
If your TV looks 3D, warped, or distorted it likely has a convergenge problem. If however it just looks dull, washed out, redish, greenish, or blueish or if it looks like objects on the screen have halos the fluid in the lens has soured. You can search google for parts or you can get the parts with repair instructions from sites such as www.TvRepairKits.com
This is no solution but a point in a probable direction.
A tech guy told me ALL the LCDs they have seen in their repair shop have "swollen" capacitors, this is due to voltage instability. Lowering the internal voltage regulator and replacing the swollen capacitors (which eliminate noise) apparently restores the LCD to new working quality. Without actually "seeing" my problem the tech said that should repair it. I have not tried this yet but eventually will begin that way.
can see it in certain lighting
and even when the TV is off! It will appear lighter than the
surrounding areas at times and can be annoying. I called Toshiba and
had a service man come out and even though he acknowledged that this is
common, Toshiba will not replace the screen.
resolder the tv circuit in the power supply and the flyback area that will solve your problem as the symtoms are intermittent just some loose components due to consistent heat over the years.good luck.
Since you have a black spot,you need to look at the mirror or inside screen. If it were a certain color, like purple or yellow, for instance, I would suggest a lens or picture tube, but, since it is black in one spot, I would suspect debris in those areas.