Version 7 with Magic 3.1 problems

[budica]

Ok here are the symptoms. I installed the chip, everying seemed fine for a couple of hours then it stopped working. The system would turn on but wouldn't recognise any games backed up or original. I opened it up again and fiddled with the wires, just checked every thing. Tried the system and it worked for a couple of hours. Ect, ect..... Also when the system stops working the disk tray will eject but wont close again. Any ideas?