Svenska ElektronikForumet

Hi. I have an HK650 that goes into protection mode from time to time. Lately it's happening more and more often. I've noticed it happens when I press one of the volume buttons on the remote, but not always. Sometimes it just turns off without me touching anything. Lately it's been harder and harder to reset it to standby mode.
Can anyone give me some advice on what and where to start looking for the problem?