Hello, this is the first time I have posted on here and I am looking for some advice please (i have posted this on another forum on here though, so apologies if you have come across this question twice!) We have had our DHT-500SD for a couple of months and not had any problems until this last week. The last couple of times we have tried to watch a DVD - the system has displayed "protect" and cut out altogether. It works fine again if you power off and just watch TV and only seems to be with the DVD. Has anyone else had this problem?