DSi won't turn on, but charging light still seems to work.

I hadn’t used my DSi for many years, and when I decided to power it up again it wouldn’t turn on. The charging light would light up solid orange when plugged in, and would eventually turn off after charging for a while, but still wouldn’t turn on. I decided to look online and figured that the problem was simply a dead battery. I ended up ordering a new one and replaced it, but the problem still wasn’t fixed. I don’t remember it going through any major water damage, but I did drop it quite a few times. Is this problem fixable? Any help would be appreciated.