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Re: plasma flat display
In plasma tvs when the screen is all black the most common fix is your y-sus board. if your tv still turns on ( led in front of tv comes on) and you have all of your voltages coming from the smps board then i would get a new y-sus board.
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Sounds like a voltage problem to its display panel. Even a slight change in the Va&Vs voltages to the panel, all plasma displays, irrespective of its brand and screen size; will show serious and strange problems. Contact any service technician, and check these voltages. this is not a user repairable work. Va & VS voltages comes from its main power supply regulator board, and have adjustment presets are there. These voltages will be mentioned at the silk screen on the back of the display panel.
If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent.
You would have to use a mounting bracket specifically designed for the type of installation you describe and it certainly would have to be fastened into the studs behind the sheetrock. A TV of that size will be heavy to lift and install in the bracket
Hello; If you add heat to the air where the set is located, you are asking for trouble. Just because it is located above the fireplace does not mean added heat. Try putting your hand on the top of the set after running for 10 minutes. Then check again every 20 minutes. If at any point the top of the set feels fairly hot, you may need to relocate set. Once relocated, do the same test. Plasma TV's run hot after an hour. Give your set a cool down period after every 2-3 hours. This will extend you sets life. If the set is not much hotter away from the fireplace after these tests, you can probably safely put it back at the fireplace. John
the photon charges at the back of the tv might be damaged, try to take it in to be repaired if not i suggest u buy a new one, please, please, please do not take it apart to fix it urself, alot of bad burns have happened to people who try to fix plasma tv's.
Here is a mount rated for your size TV
Also, be VERY careful mounting ANY plasma above a fireplace. Plasma sets are typically convection cooled to avoid the noise of fans. The heat from a fireplace will GREATLY reduce the life of the set. When people I know insist on putting a set above a fireplace I usually insist they install a cooling fan with ducting that will vent fresh air to the set. If you are concerned about the temp of your set simply consult the owners manual for operating temperature and measure the air above the fireplace yourself.
BHphotovideo.com typically has good prices on mounts along with amazon. most other places like bestbuy or circuitcity will stick you on the price of the mount because they make their money from accessories.
Also, why did your last set die? plasmas are typically rateed for 10+ years, did yours over heat and start to change colors?
Both LCD TVs and plasma TVs get hot, though plasma TVs tend to be a bit hotter in my experience. Also, plasma TVs are going out of fashion.
A lot will depend on the construction of your fireplace. If it's brick it should insulate fairly well.
Either way, I would recommend a mounting solution that does not put the back of the TV flush with the wall. Get one that tilts. I would avoid the "arm" style ones as that will put additional strain on the mounting.
Remember to think about how you want to run your power and video cabling as well!
If you are lucky, it could be an open resistor or defective IC. Otherwise, I see a new TV in your future as the Plasma display would cost nearly $5500 for the part alone. If the fireplace is used much, I would not mount a TV above it, especially a plasma set which generates a lot of heat all by itself. If the fireplace is only used occasionally and you want to put the replacement set in the same spot, then I would consider a LCD model instead.