THE TV HAS NO MENUS , BUT IT I USE THE VIDEO OUT PUT FROM THE BACK OF THE TV , CONNECTED TO A MONITOR IT OK CHANNEL CHANGE ,I CAN SEE OD GET A DVD OUT PUT . YOU SAID THAT THE BOARD MIGHT BE BAD. IS THE PLASMA SCREEN OK . WHERE CAN I PUCHASE A BOARD IF ITS BAD
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The tv main Tuner signal board have intermittent problems,sorry this problems it could be anythings wrong in the board as parts wise are dying in the tv Tuner signal board just not completely,that why it take times to show up,that the board where the tv incomming broadcasting signal cable plug into it.U can take things aparts and putting it back together again?Yes.Try website like Ebay.com to buy a refurbish main Tuner signal board for the replacement.Or take to the shop for the repair that it.
This is how I approach this problem:
I check for menu appearing on the screen:
If it has menu, I look at connections.
If it does not have menu then I check voltages from the power supply.
I check for the following voltages.
VSCAN, VS, VE, VSET and VA.
If only one voltage is there, then, the PCB that needs to be replaced is normally the SMPS and/or the Logic.
If all the voltages are there, the Digital PCB should be replaced.
If it is missing one voltage, I disconnect the Y Main and X Main from the power supply and check if the voltage reappears. This symptom is normally caused by one of these two boards having a short on the missing voltage line. The defective PCB and/or the Power Supply (SMPS) need to be replaced.
If you are in need of a technician, contact Samsung at:
If you have any other questions, reply to this post and I will respond.
If the screen is not illuminated this can be from the screen power supply, the main screen driver board, or the screen itself has failed. The service rep will change boards to service this, and adjust as necessary.