I downgraded from 5.03OFW to 5.00M33-4. It was doing completely fine, I used PSP Grader to downgrade it. And when you use PSP Grader, you have to hold L as you turn it on...Just for fun I wanted to see if I could get to that menu again. So I held down L, the PSP screen went black then I couldn't turn on my PSP. The only way I can turn on my PSP is not to plug in the charger, turn it on, put battery in, take charger out....any fix to this? I Googled for an hour and couldn't find anything about my current situation.
Here is what I have: 1 Pandora's Battery, 1 MMS, 1 PSP 2000. That is it. No spare Memory Stick, no spare battery.