5D LCD / back buttons dont work...

[jdear]

I was just testing shooting my backup 5D tethered to my laptop and the camera had a 'busy display'. Eos Utility told me the 'camera is busy and cannot connect'

It did this for ages - couldnt fire another photo etc, so I pulled the usb plug on it and then turned the camera off. Turning it back on, now none of the buttons on the back of the camera work - LCD preview, delete, menu etc and the lcd doesnt show up a photo when you take one.

Camera still fires etc. Ive taken out both the CR and normal batteries, turned on and off, changed CF cards etc... but it looks like it has crapped itself???

Thanks in advance!