My Beomaster 7000 has begun to display a strange behaviour. After some time on standby, the left button will not turn the unit on again. If I then use a remote control to turn it on and then off, the front panel button wil work again. However, after some time - e.g. if I want to turn it on next morning, the button will not work again. Argh. I initially thought it was the backup battery that needed replacement, so I did that. Same result. Can anyone point me in a direction to what I should look for? Of course I can just use the remote but it annoys me that the Beomaster is not working 100% as it should.