Need Help!! -- Not Charging--

[crazyl69]

    I have a psp slim, Darth Vader Edition, that wont charge the battery using the AC charger. I've checked the charger using another psp and it works fine. I've also checked the battery on another psp and it works fine but when I use both on the same psp slim, the charging process unsuccessful. The psp turns on fine as long the battery has charge. It appears that I have to charge the battery externally, away from the psp, in order to play the psp. Could I have a blown charging fuse? If so, were can I find the fuse? THANKS!!!!