I modded a pal 39003 with V7 magic-2. All seemed ok, but I wish I had read this forum first!!! The location for Magic-2 in installation pix is on the board under the heatshield There is no way I could screw heatshield over the Magic, so I just used 2 screws to lightly screw down heatshield...
An hour from cold the PS2 now hangs and goes into flashing green led, not ejecting, no display mode!! and thats with chip-removed.
If I wait for say 10mins and switch on again all appears normal.....for a little while before the same happens. Anyway I have now used ALL the small screws to hold down shield and keeping fingers crossed!!
I wonder if I have perma-damaged PS2?