Same problem

I bought the LG LHD627 home theatre system, after a couple of months the system shuts of automatically after couple of hours, I took it back to the store since is was still under warranty, The repairs company inform that they don't get the part that was damage anymore and replaces the system with a new LHD627 , It still had the same problem and I returned it again and was replaced with a new one again, The new system has the same problem of switching off after a couple of hours, This was now the 3rd LG home theatre with the same problem and you don't have the parts to repair. The store wanted to replace it with an Telefunken home theatre but since most of my appliances and TV is LG I would have liked to stay with LG, but now I am done with all LG Products.