Was following a guide here on qj how to make the ultimate pandora battery and was in the process of upgrading firmware to 5.0 as per the guide (it had heap of different variations on how to upgrade depending on current CFW). Yes I did have my battery fully charge in the AC adaptor in and all the rest of the usual stuff. About 32% into the upgrade psp died. Tried turning it back on, no go. Tried booting in recovery mode, no go. Tried using my mates jigkick battery and pandora still no boot. Only light that comes on is the Green power light. Any suggestions? I haven't seen this before and haven't heard about it happening, scoured google for half the day on this problem and no solution still. I was running CFW M33 3.8.
Thank you in advance :)