I'm afraid I think my PSP has come to the end of its life... it's still under warranty... but I'll just tell you anyway.
I was upgrading my PSP to 2.6. I'd done the Network Update download part, then I ran the update, had the AC adaptor plugged in, and started the update. I turned around to answer a question my sister had, and accidentally knocked the power cable out. Now, when the PWP (Paper Weight Portable) turns on, all I see is the green light. Nothing appears on the screen. There is no sound.
It's bricked, ain't it?