Touch Screen Flicker

I am having problems with an older Hog II. The left hand touch screen seems to flicker its signal in and out. The touch screen goes alternately from dark to light and occasionally will clear up with signal, but then goes out again.

It has been suggested that the internal battery may be at fault. It appears that the touch screen in question has been replaced recently (it seems brighter than the other screen), so this may be a factor.

Any help would be appreciated
Thanks
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