Butters, your tips were very helpful, thanks, but unfortunately some flat cable tracks were broken when I disassembled the GPS. One expert tried to redo some tracks, even appeared the image, but with many flaws. I tried another screen and it worked perfectly. Now I'm behind a screen at a good price. The learning was: be very careful when taking apart another GPS. It was the first time it happened, and I hope it will be the last ..