I have used the guide a while back to unlock two psp slims (3.71) using my CF phat psp (3.71 m33-3). I am now doing the exact same procedure but it sin't working anymore.
After I do all the stuff with the UPMS installer, then press exit, I get a "memory stick cannot be read error", which I dont think I got last times I did it.
Anyway, I still put the UPMS and pandora battery in 2 different slims (3.71) and it doesn't seem to load the ultimate loader. I am holding L when I do this, but the screen just stays black and the green light is on.
Seems like a couple of people got the same problem, but no solution yet. Any help would be appreciated.
PsP#1 : 2.01>3.71M33-4>3.80 M33-5
PsP#2 (Slim) : 3.80>3.90M33-2 All hail the UPMS Stck
If you need a UPMS Stick go here and then go here :-) *As recommended by January39
Tried the new version and still got the same problem. I finally managed to solve it, just had to make sure the ac adapter was plugged in before step 3 of the installer.