i just bought my psp slim and it came with OFW 3.80. i used my psp phat with CFW 3.80 M33-4 to creat my magic stick and pandora batt. i follow each and every single step correctly, i've confirm even with the cmd etc..press yes to both. oh my batt. is Sony v3.6 2200 mAh and my memory stick is by ScanDisk 4.0 GB Memory Stick PRO Duo. not sure if having ScanDisk have to do with it rather than the actual Sony Memory Stick PRO Duo itself but as i continue slapping my memory stick in the slim then the batt(after making sure no wire is connect, no UMD theme is set to normal blah blah). i power up the slim and all i get is blank black screen. i waited 10mins hoping there is a delay but nothing showed up at all. i put my slim batt. back in the slim powered it up and its boot normally. any ideas?
Edit: i just tried the memory stick + pandora batt. on my psp phat and as it boot up it gave me options. didn't really read them but i know its working for my psp phat.