Fired it up today for the first time in a while, and now I'm having a similar issue to what @theangel540 was experiencing. Booting the cart without an SD card shows a white screen, but booting it with a card shows a black screen with a gray gradient at the top. Not sure who's repairing these now...
So ultimately my cart wound up going to @Darksoft, and he determined that one of the SPI chips had died and was causing all the issues I had. I'm pleased to report that it's back in my possession and everything works great again. :)
I've been having some issues with my AES cart lately, it started having trouble trying to flash games and now it just boots to a white screen. I've attempted to update the firmware and menu, but nothing seems to work. My AES still boots just fine with regular carts and I'm using the PRO-POW-UL...