Hi Paul,
My PVR 9200T had been getting very flakey and taking ages to respond to remote control commands, not recording when on standby and then ...
... Interestingly, my PVR 9200T did exactly the same thing you describe on the 5th of June (2010). Recording icon in the menu gone, new games icon appeared. No way to access recordings on the drive.
I also noticed that the time display has disappeared in Standby. It's OK when switched on but just has 4 dashes and a flashing colon in Standby.
There is a posting elsewhere on this site about the missing clock but I don't know if it is just coincidence or part of the same fault as you are seeing. Try Googling "humax 9200 no clock display".
Maybe it just needs a new backup battery. Don't know, not looked yet.
When I power cycled it, I got the message "Do you want to format a new hard drive?" to which I hastily said "No"!
Now, my PVR 9200T box still works as a Freeview tuner just no recorder functions any more.
Mooching around various forums, it seems to be that the hard drive has been corrupted.
I have now taken the disk out.
It still spins but it doesn't seem possible to communicate with it.
I have tried the humaxrw software (have a look at "humaxdisk.wikispaces.com/HumaxRW"), I can't read the disk but can't really tell from the software what is going on. As I don't want to reformat the drive until I am sure it cannot be read, I have bought a new hard disk (Search for Seagate db35 and look for drives with an ACE suffix in the part numberat www.cube247.co.uk).
Now, I haven't received this disk yet so I don't know if that will fix the problems.
I have also discovered that 9th to 14th June, there is an over the air update being broadcast. More here:
http://www.dtg.org.uk/retailer/download_schedule.pl
Humax make no mention of that!
I have just downloaded that and it has installed OK even without the hard disk in the box (to be expected since the disk only stored TV data and no operating system stuff).
With the drive out, the box no longer asks about wanting to format a new drive (but there is an odd message about some network update on 01/01/2013 which may be be the date when my local transmitter goes fully digital on something like that: I click OK and it goes away till the next power cycle).
Sorry I can't be of more direct help but if I manage to fix mine, I'll post details back here.
faffmeister, June 2010