To Mario,

This may help -

V-Amp Pro.

It seems that the voltage-held RAM is connected directly to the power supply, as when you switch the unit off at the wall you tend to lose all the User presets. This is why you must backup your User presets to disk. The next time your computer detects your Behringer V-Amp Pro you reload the User presets (from disk) via MIDI=>USB.

I have a similar problem. All of the letters on my Editor screen appear corrupted.

Sol