I think one of my flash drives is kind of borked. I have Gen-B 2 and tried to update to Gen-D but when I tried the update I only got a black screen and nothing happens. After that I tried to go to Gen-C first but the same problem happened. I thought that may be my Gen-B had a problem and tried to downgrade to M-33 with Hellcats programm but when I tried it, I get a lot of errors saying there's a problem with the flash drives and nand update.prx error or something like that. But I the PSP works perfectly except that. Games, Homebrew etc has no problems.