screen gone blank

[rockybalboa-uk]

Hi

My on board monitor screen seems to have gone blank. When turning the ignition key, it seems to 'flash' but nothing shows on screen. The radio works fine as do the 'seek' buttons on the screen itself.

Diagnostics show board monitor error number 22 but this error is unknown. I've checked fuses - all okay. Tried disconnecting the battery for extensive periods - still no joy. I've also tried disconnecting and reconnecting the cables to the video module.

Could it be the video module or the board monitor itself?

Thanks.