with one of my Explorer XS's. All else was fine and it still detected metal as it should have, BUT the screen was skewed, wonky and basically, for me ,un-usable(or JUST usable).Simply kept doing a reboot.
Like Travis mentioned, it is "either a ribbon cable to LCD connection problem, or the LCD is defective". It's been a unique and rare problem GOING BY what gets posted around the place and , in a way, glad someone else has experienced what seems to be the same problem.
I recently ordered a new push button control panel to start a series of trials to isolate the problem. The push button control panel is the only ribbon type cable connection on board, as all the pcb's, including the LCD are interconnected by gold(male into female) pins directly off the boards. I did firstly try to re seat all such connections BUT it never cleared the problem. It just got worse and eventually died. Funny, I thought it was little "experiments" on the Explorer XS that were the reason for it's ultimate death. After seeing this , I wonder.
Definitely send it back to Minelab if you're not confident enough to try and adjust/fix it your self. This problem needs attention. Should get sorted out very quickly, at least from knowing what Minelab here in Australia are like. Hope the U.K Minelab(if it's where it's going) are just as efficient.
Hard Nosed Dave