Hi! So, I recently bought a gba sp, it's a ags 001, used. After a few days I noticed that the red light turned on even after it was fully charged. I changed the baterry (bought one that isn't bulged and has a bigger capacity) mine had a bulge or how you call it in english, anyhow, I thought that would fix to problem, well I was wrong and now the red light is permanently on when the device is on as well. What do you think might me the problem and the solution, I leaned a bit into this and my beste bet is it's the power switch.