You may find the answer in the Humax PVR forum
http://www.digitalspy.co.uk/forums/f...play.php?f=119
There are plenty of threads about the problems with the 9200.
One thing though. When you retuned did you just simply do an automatic channel scan or did you delete all the channels first? I know from my own 9150 that doing an auto scan alone can seriously screw the poor thing up,
The way to do a retune is to go into the Edit Channel list menu option. Use the Select All option then Delete to remove all existing channels. Repeat for the Radio channels. Then do an auto scan. Or do a full reset on it which does the same thing but also destroys all your timer information as well.
That tends to sort a lot of problems with the Humax channel memory and the Programme Guide. Things can get a tad more complicated if you are picking up two or more transmitters, as many in the North West have discovered with Moel Y Parc and Winter Hill transmitters going through Digital Switch Over.