Lowrance Help

I have a Globalmap 3600c igps that Lowrance no longer services. I purchased the unit approximatl 6 years ago. When I called them to inquire about service they didn't make any suggestions......only told me that they no longer serviced that unit and they would extend me a small discount on a newer unit. I called back a second time to ask if they had any suggestions and they suggested finding a local electronics shop that might be able to look at the LCD board/screen. Does anyone have any suggestions in the Louisville our surrounding areas?

The screen doesn't seem to want to come up at all.

Thanks.