Sounds like The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
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SOURCE: My TV pictures turns black afetr a few hours but I still can hear sound perfectly!!!
It sounds like your rptv lamp is going out. If this is an older DLP this is most likely the cause. You can get a replacement at www.laptopsforless.com part number BP96-00224J for $151. If the tv is still under warranty, I would have them do it, otherwise replace it yourself. If so here is a link to give you step by step instruction. Please give me a good rating. ;-)
SOURCE: Samsung projection TV intermittent shut-down problem
I just called 1-800-samsung & choose the parts dept.
For the replacement lamp it cost $149.99 plus tax & shipping .
My total was 167.08 for Fl. You give them the lamp code ( red sticker on the side of the tv) , they send it out 5day shipment.Local tv repair services can install it for an installation fee. This will save money apposed to ordering through a tv repair shop who charges an order part fee plus etc...
SOURCE: The monitor goes blank after just a few seconds or sometimes works for hours.
My monitor worked one day - gone the next. Nothing on the screen except a bright green glow. No tech support for this problem. They want $70. just to look at it.
SOURCE: Samsung TV will turn on and off several times, then stay on.
First, need to check the power bar(if you use).
then. if don't use power bar, need to check the power board.
SOURCE: Picture goes black but hear the sound
this is the problem related to display of ur TV screen...please contact the service centre...plz dont try to repair it urself..
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