Infinity ?
 

I have installed an Infinity chip and seem's to work because I can disable it and flash from 1.22 to 1.36 through a memory card. But I woun't seem to play back-ups, is there a prob with the chip or would that be a solder joint? I have gone over the points and checked them with a meter and it seems to be fine....

do you have the homebrew version?

since he says he can flash it from 1.22 to 1.36, probably not...

ok go over the bios wires. There may be a slight error or a dry joint desolder them flux the point and add fresh solder.

Nope not a homebrew! had tis chip in another PS2 and the lazer went out so put it in this ver.10. Which wires are the bios wires? are they A B G H I, and is there an alternate sx point. Would that SX point cause something like this!