Well it is presumed to be a hardware problem so just try upgrading and then downgrading to see if that fixes the probelm, I have heard of people upgrading then downgrading again and that fixed thir wi-fi probelm and I think I saw someone who fixed their disk reading problem. If you have used a flash editing program on your 1.5 then that can cause problems, ever since I changed the gameboot I can't exit from UMD's but I am not bothered about that.

__________________