Digimate III with touchscreen won´t turn on

Hi.

I have a Digimate III with touchscreen. After a while with no problems, it won´t turn on now any more. When I connect it to the PC it works very well, the transfer is ok and the indicator for the batery shows, that it is charging (or fully charged). I can also turn it off, but not to turn it on again. I have a fully charged battery inside. I don´t have any idea, what is wrong? Is it possible, that a touch-button can work only to shut te imagetank down, but it doesn´t work to power it on?
Had anyone same problems?

Thanks for the help.

Gregor

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