PSP reboot problems

Anyone ever run into an issue where you can't reboot your psp? I installed the M33 upgrade over my 3.40 OE-A and I can't do a reboot on my psp now for some reason. I've held the power switch up for 10 seconds, 30 seconds, 1 minute. Taken the battery out and tried to turn it on. Then taken the battery out for 4 hours. No luck with any of this. It still acts like it was in sleep mode and comes right up to the XMB or whatever it's called.

Looks like I missed the last step, nevermind.

Hey man, i was having a similar problem, you need to restore you factory setting.