Help needed with Matrix One boot problem

[uncleflip]

Howdy. First time poster here. apologies if this is int he wrong area.

I was recently shipped a matrix One tablet, and it now seems stuck during boot. It shows the Android 'robot' logo, then the matrix One splash screen, then the one for Android....and it stops there. It will sit on the android lettering forever if I don't turn it off. (Longest time I left it there was 4 days.)

Does anyone know if there's a way to unstick it- or barring that, can anyone help me re-install a working version of Android on the thing?

Any help is very greatly appreciated!

Be well
-UF