Hi everyone. I have an old Megatouch XL 5000. I recently purchased an upgrade kit to upgrade to Platinum. I bought 64 MB of RAM, XL Platinum CD, the new dallas key holder and key SA3046-01, and an eprom SA3014-04. I replaced all the parts and powered on the game, it loaded just fine. However the touchscreen is now only working in the corners. I tried going into the settings and calibrating the screen, yet it would not work and did not do any good. I returned the game back to an XL 5000 and everything works fine. Does anyone know why the touchscreen only works in the corners when I upgrade to XL Platinum?