Has anyone experienced this problem?

Recently, our RU890 seems to need a cuddle before it will operate properly. Here in the UK temperatures are still around 18c, so it's not exactly freezing.

If I try to change the satellite channels it doesn't work. And although the screen shows it is sending a signal, for some reason the satellite is not receiving it.

However, after about a minute of so of warming up the Pronto with my hands and breathing warm air on to it it starts to work ok. We've had it about 7 years now and I am wondering if this is a sign that it is on its way out.

My husband suggested it could be the Panasonic satellite receiver, but why should warming up the Pronto make the receiver work properly?
Any opinions would be welcome.
Thanks Caroline