Today I tried to upgrade to 5.00-M33 from 3.90 M33-3 on a PSP-2003. The upgrade appeared to be successful, then following a reboot all I get is a black screen and constant green light. To completely switch off the PSP I have to hold the power button up for atleast 10 seconds. I have a pandora battery (which successfully hacked another PSP-2003) and Magic Memory Stick (created using Rains Ultra Lite MMS 500 v12). Unfortunately with the Pandora battery and MMS installed I am unable to get anything but a black screen using the L button. I am also unable to access the Recovery Menu using the R button. I have tested that the Pandora battery and MMS work on another PSP using the L button. The menu appears as you would expect. I am at a loss on how to progress and think I am looking at a hardware fault. Any help/suggestions would be very much appreciated. Cheers D.