Firstly, I've searched the forums and couldn't find a situation quite like mine. Most xboxes that have a problem after being unplugged for some time simply frag, but mine just boots to MS dash. Have had the xbox for years now and installed xenium ice chip several years ago. Still running with xenium os v2.0 I think. Have not touched it since installation, it has just been cruising all this time with no problems whatsoever.
I have had the xbox unplugged for an extended period before, maybe up to a week, without any problem. Recently went on a 6 week vacation and just unplugged all my gear for safety reasons before I left. Now the xbox just boots to MS dash, so it's operating as if it doesn't have a chip installed. I set the clock to correct date/time in MS dash but still just boots to MS dash. It's almost as if the chip has come loose or something but it has not been bumped or moved. I used adapter installation and it has never given me a problem since install several years ago. I'd rather not play with the chip again unless I absolutely have to.
I had it set up so that it would boot to XBMC when power button was pressed and boot to xenium OS when eject buttion was pressed, can't remember if they are the defaults. I have tried holding the eject button in (I think that is supposed to enter recovery mode), but it still boots to MS dash. It has had power connected for several days now, so any charging that needed to be done should be done by now.
I have some ideas what I need to do but I don't want to cock it up as I still get a lot of use out of the xbox with xbmc, also still use it a lot for gaming as well. What is the best and easiest way way to recover from this situation. I know there is usually never a concrete answer, but it's not broken, (not fragging).