Thought I'd post this rather odd problem (solution):
At customer's house to look at their Samsung LE32R74BD which would not tune. When in the tuning menu the scan would start for a split second and then revert back to the main menuscreen. Tried a factory reset but the set behaved the same. The customer also had a Daewoo DRVT-40 combi linked which upon closer inspection was found to be frozen, that is to say no channel change or power off. So to cut to the chase....disconnected the combi....Samsung now tuning and working fine.
The Daewoo also worked ok after mains disconnected but has frozen again.
Anyone had this problem with a DRVT-40? I've only visually checked for caps in psu so far.
Cheers and hope this helps others.
G