I have a Samsung 75" TV that has an intermittent audio issue. The sound raises or lowers on it's own, sometimes it also has heavy distortion also. After contacting Samsung Customer Service they determined a service call was required. They issued a Work Order to their Service Company, a service visit was made and the speakers and motherboard were both replaced and I was charged accordingly. The issues occurred again the next day and another call to Samsung Customer Service was made, work order issued and service call made. This time the technician only adjusted settings and left. The issues occurred again and the above process repeated for the third time with the same results. Every time I sent recorded videos to Samsung to document the problem. They're recommendation is to keep repeating this process until my 90 warranty runs out. At that time they will not tell me what will happen; will it be declared unrepairable and I get the money refunded or am I just stuck with a bad TV. Note that they will NOT allow you to talk to anyone other than a Samsung Customer Service rep who will only issue a work order. This person has no knowledge of what a technician will or can do other than replace parts. Also their Authorized Service Center will also NOT allow you to talk to anyone other than a Scheduler who schedules the tech visit. Their process seems to be in my type of case to wear down the customer until the frustration gets the best of him and he gives up. Please read the other reviews about their Customer Service, they are accurate.