IIRC either the EMS cart (if that's what you are using?) or LSDj itself needs more power than normal carts so it would explain why the console boots up but there's not enough power to run the cart/LSDj.

thanks for the tips guys I thought the batteries that I had already in them were OK.. but as it turns out that was the issue. As soon as I replaced them with a brand new set, it works! Which is weird, but I guess they weren't the best quality batteries in the first place.
I don't have any game cartridges to test with so that was off the cards.. but thanks anyway!

fresh batteries?

First of all, do normal carts work?

EDIT: Also, does the cart work on another console?

Hey guys, just got a second hand DMG in the mail today but when I inserted my cartridge with LSDJ on it, the rom wouldn't load. Just wondering if anyone else has had any experience with this before? Like, the nintendo logo rolls down and plays the start up music, then it seems to reset, a line goes across the screen and nothing..
Does anyone know any fixes?
thanks