(Not a 3DS issue, but a DS Lite issue)

[wild sluice]

I was taking apart my DS lite to fix a stiff problem with one of the shoulder buttons, but then when I take it back together, the bottom screen is all fuzzy, and is shaking all over the place! The touchscreen still works, but you can seriously see an issue when it’s turned on

[neat bay]

I’m not sure, because I’m not an expert nor have any experience, but I’d have to guess that the touchscreen wasn’t put in the right way/tight enough