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. Repair Service This sale is for a REBUILD SERVICE on your main board. You will have to send your part to us for repair. We will rebuild and mail the part back to you within 48 hours after receiving the part. We use USPS Priority Mail service which takes additional 2-3 business days for delivery. you need to send your main board to us for repairing. We will provide the address after you purchase this repair service. 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. In most cases we can repair the defective SN board.If your board can't be repaired, we will contact with you and do the refund ( no repairing fee, pay return shipping fee only) ABOUT THE WARRANTY: UNLESS SPECIFIED OTHERWISE, ALL OF OUR PARTS ARE WARRANTIED FOR 30 DAYS. AGAINST REPEAT IDENTICAL FAILURE FROM THE DATE OF RETURN SHIPPING. THANKS FOR READING AND WE LOOK FORWARD TO DOING BUSINESS WITH YOU