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You can order a main board if you would like but there is a very thin chance of it fixing it, TCL sets are known for backlight failure, and not many board issues, you can get replacement strips from shopjimmy.com but make sure you get the right ones as they use several strips for the same model set, you will need to get the set apart to see what part number you need
There is no easy way to test the tcon board. Try switching inputs to determine if you can hear sound from a program. If so, then the tcon board probably is your problem. If you can not hear program audio, you may have a problem with the main board or microprocesser.
Hi Ansari
It sounds like a main board problem. The control voltage that goes to back-light inverter board; from the main board, goes down. Contact any service technician. This is not a user repairable fault. Gopakumar Gopalan Google
First of all this might sound silly but when you say (turn it back on disconnect my old graphics card on safe mode) did you actually pull out the graphic card from the mother board while POWER WAS ON??? if so you definitively damaged something (the mother board or the power supply) to check you could try an other power supply if it still wont work than it's the mother board, now if I've miss understood your question it sounds like a SHORT CIRCUIT somewhere on the board check for lost screws that could have fallen and running loosely on the mother board while changing your hardware...
IF U HEAR BEEP SOUND WIYHIN FEW SECONDS OF SWITCING ON THE CPU , THAT MEANS MOTHER BOARD IS SENDING SYNC FOR MONTITOR . .. IF BEEP IS COMING LATE & MOTHERBOARD IS IVING SIGNAL BY LATE ENTER THE BIOS MODE & DISABLE ALL DEVICES WHICH ARE NOT INSTALLED, LIKE FDD, ETC SINCE BOARDS SEARCHES FOR COMPONENTS , SECOND THING ENABLE FAST BOOST , IT WIL SKIP ALL MOTHER BOARD TESTS
First remove the Ram and boot the system without it. If you hear continuous two beeps, then the problem is with the Ram, you need to replace it. If nothing happens, then your cpu or your motherboard is gone.
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can be a faulty mains board, does the sound still work? if not, can be mains board, and at last if there is a continuous clicking sound it a faulty power supply.
the unit is over heating. Make sure you hear the fan come on. Also make sure the unit is in a spot where it gets ventilation. They get real hot and need to disapate heat or the mother board burns out.
re-install drivers, if it works, ok otherwise check speakers on other system. if the speakers are ok, then the sound section of mother board might gone out of order, need an extra PCI sound card.
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