Symptoms we can fix: HDMI don’t work but TV turns on fine 756TXACB5K005 715g4365-M01-000-005K Symptoms of a bad Main board: LED on the frame blinks as soon as the TV is plugged in, but never stops blinking. LED on the frame blinks 20 times or so once the power button is pressed but the TV never turns on. Pressing the power button a second time only makes it blink again. You will have to send your part to us for repair. We don’t repair burned boards, missing parts or If your board has been repaired or replaced parts. We have the same TV to test your board We will make sure your BOARD is in working condition and send back to you. We have been in business for over 25 years to repair tv lcd dlp plasma. THANKS FOR READING AND WE LOOK FORWARD TO DOING BUSINESS WITH YOU. Track Page Views With. Auctiva’s FREE Counter.