Problem with AV Map GPS

AB4WS - Jack

I have used an AVMap 6 connected to my Kenwood TH-D710 in the car for APRS for years but today the screen of the AVMAP 6 no longer responds to touch, and therefore I cannot after turning it on get to the GPS function of the device. 
Anyone else have one of these and have had this issue? 
Any Solution? 
Anybody else using any GPS Map based system connected to their Kenwood TM-D710 for mobile APRS?
Ideas, help, and other solutions requested!
73 de AB4WS,

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