My 722k sometimes will record a programme in the middle of the night without setting it to timer record. It will endlessly record for upto 5 to 6 hrs till you wake up to find the reciever is on and recording. Also this morning The receiver had no sound for upto 5 hrs. I unplugged the receiver. Changed the HDMI cable and also set the receiver to default settings Nothing helped. After 5 hrs the sound came back on. Is anyone aware of this issue? My software version is L757. Thanks in advance.