Ok, I was on 5.00 m33-6 and wanted to try out 5.50 GEN-D2. Before I updated, I made a NAND backup with Hellcat's recovery flasher. I updated to GEN and ended up not liking it, so I used that NAND backup to restore. (with recovery flasher) And now when I turn on the PSP, I just get a black screen for about 20 seconds then it turns off. Am I screwed or will a pandora battery be able to save it?