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Re: tv gets bright and then get dim and dose this the...
If you watch a DVD, does the picture also flash? If not, it might be just the TV signal. Are you using a cable/satellite receiver? If so, check it's connections. If anything viewed on the TV, using different inputs and a different cable/wire, is flashing, it is a problem with the light engine or color wheel, if the TV is DLP.
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If you set the lamp mode to LOW POWER, each time you turn ON the TV the lamp will start out at HIGH BRIGHT mode, but will switch to Low Power mode after a short period of time. You may notice a change in screen brightness when this happens. This is not a malfunction.
Just check whether you have selected this mode. Go to its user manual [P57]. All details are there about the lamp brightness settings. If it is not set to Low Power and still you get a dim picture, the lamp may be weak and has to be repaced. OK.
When it flashes blue, are the flashes bright blue lines going across the screen with the picture in the background, if so, It sounds like the Blue tube or blue driver circuit is breaking down after a short period of time. If this is the case, the uPC that controls the set is detecting a large current drain on and is shutting the set off for protection, An engineers expert eye is required I`m afraid. Ian.
replace both stk392-110 convergence ics.the crts could be weak if you have no brightness.if the picture is dim the crts are bad.but the movement of the convergence are bad stk392-110 ics.some models they are very difficult to
change.you may contact me at 972-579-0527 if you are in the dallas/ft.worth metroplex.