Now, I'm going to assume this is a battery issue, but my abundant lack of electronics/modding/game boy knowledge means I don't really know what to do about it. I can certainly turn up the contrast while playing music, but that can get to be a pain, and is not a very nice solution.
Specific details: This is a Game Boy Pocket (as you can see), with nonfinite electronics' V5 backlight with Varia5uit mod installed (the normal magenta option for the Pocket). A very poor installation, but it sorta works. I'm running LSDJ in an EMS 64M USB Cartridge.
Anyone who knows what they're doing have some advice?