I have joined this forum because I have the same issue and also after almost 5 ears. What a coincidence.
My problem exactly is that my machine looses all my schedule if I put it on standby. I contacted Humax and got emailed the instructions to get it back to the factory setting. I have done this 3 times over about 5 weeks. It is behaving now but I must replace but what with?
I would like to hear what others are doing.