Here is an interesting comment from the CNET forums r.e. sounds distortion:http://forums.cnet.com/5208-13973_10...rum-w;forums06
post 102 of 172
My opinion on where the audio problem lies
by SLR42 - 29/11/08 12:19 In reply to: Read and Noted! by Samsung_HD_Tech Samsung staff
Previously I wrote that the audio problem just suddenly appeared on my LN32A450 and that having the board changed fixed the problem. I continued to follow this forum and after people started saying that their sets malfunctioned after they unplugged them, I suddenly remembered that my problem started after I had unplugged my set in order to mount it on the wall. So, as an Electrical Engineer with 40 years of experience in circuit design, I can say with some confidence that the problem lies in the power up reset circuit. All microprocessors have a minimum operating voltage below which they lose control and do random things. One of the random things is to wiggle the write control lines to the non-volatile memory, which can corrupt said memory. A properly designed reset circuit will protect all of the peripheral circuits, and especially the memory, from harm by forcing them into a known safe state before the microprocessor goes wild. So, buried somewhere in the Samsung circuit board is a memory chip that is programmed at the factory to properly decode and process the audio portion of the incoming signal. This memory probably holds some fine tuning information, so the audio is not completely lost, but just becomes marginally stable. Somehow, the factory reset process puts the circuit back into the proper state, but the problem then reappears the next time power is disconnected.
Either the reset circuit was not designed properly or the microprocessor has changed and loses control at a higher voltage than the reset circuit was designed for. On a traditional circuit board the fix would be simple, but on today's highly integrated boards it may not be so cheap to do. Either way, Samsung better get a grip on this before they lose their hard won reputation for quality products.