I have tred to use the device this evening and although the front panel was lit, the TV was telling me that the device was powered off.

I rebooted, and I can see that there is a message telling me err28 - no space left on the device, which is odd, because there was more than 75% free when I ast looked, so I guess it must not be the movies storage area which its complaining about. then it reboots and does the same again - it doesn't stay up for more than a few seconds

I can't get in via telnet, or openwebif. I would be reluctant to do a factory reset, unkess it's the only option..... any suggestions?