Version 7 with magic 3.1 question.

[budica]

Hey guys, I've got the v7 ps2 with a magic 3.1 mod chip. I installed the chip and all worked fine for a couple of hours, then it could load up any games. I opened the system checked the wires (all ok) closed it up and it worked for a couple of hours then right back to not loading up games. Ect. Ect. now I'm back to it not working but opening it up didn't fix it this time.

Any ideas on where I went wrong?

Thanks.