Medion MDPNA 100 screen switches off

[3DDevil]

This is driving me nuts. Need help bad.
I've spent every available minute during the last two weeks trying to get Tom Tom to run on my MDPNA 100.
I have finally achieved it (Woooo Hoooo!) and now the damn screen switches off each time I tap it. It switches back on if I tap it again or if I press the SATNAV button.
Please, Please, Please there must be some one who knows the answer.
Please help before I revert to an AA map book and my old PSION in desperation.

Thanks,
3DDevil

[kezm]

have you checked power setting m8 mine did it because it had turn off after 1 min mught be worht a check

ps how the hell did you get tom tom to work my pna100 can never find a bloody satallite