Main board failures our service covers. TV cycles on and off. TV turns on and shows Samsung logo, then has no picture or sound. What is the turnaround time for repair? What if my symptom is not listed or I have another unlisted issue?We are able to repair most symptoms that are not listed, please message us prior to placing an order. Do you work on boards that have been serviced before or have missing parts? We sure do, but you must message us with details prior to placing an order. What happens if you can't fix my board? What if you receive my board in working condition and it passes your tests? The item "Mail-in Repair Service of UN78HU9000 Main Board One Connect Box 1 YEAR WARRANTY" is in sale since Tuesday, October 1, 2019. This item is in the category "Consumer Electronics\TV, Video & Home Audio\TV, Video & Audio Parts\TV Boards, Parts & Components". The seller is "nickstvs" and is located in Tucson, Arizona. This item can be shipped worldwide.