Also had the same problem Caroline, just the blue light
no other buttons work. Computer cannot open the device when its plugged into the usb port so I cant see the files or format it.
Also bought from Argos, they said it was excluded from returns policy unless its broke.
I havn't gone back with it yet, this only hapened yesterday, it turned itself off. I thought it was the battery and replaced it but ever since it hasn't worked.
Maybe it shorted out. As you can't access the mp3 hard drive on a PC, you can't do anything. If I can't find away I'll bring it back but I wont get another Mikomi!
Michael
October 2006