Was taking the screen out of my GBA SP since its broken and found that its got a white wire soldered to it, should that even be there

Hi everyone, I've been a Gameboy fan since I was little. My parents gave me a dark green Gameboy Classic back in 1996. Along with that Gameboy, they also gave me a game. It was a plane that shot monsters (I remember one; it was a giant brain). I don't remember the name at all, and I can't find it. Do any of you remember it? Please, I'm going crazy.

The pins look fine when reconnecting cpu pins, they broke so I replaced them with wire the games still look corrupted and the ram pins will not move. I think they are good idk what else to check any thoughts?

My gbp A button suddenly stopped working and the pcb is perfectly fine no oxidation nothing like that it just does not work. is there a part that I should clean or check to see if it works? I don’t have a multimeter

Hey I dropped my Pokemon Emerald a while back and the part that actually holds the coin battery popped off the circuit board. Anyone know a reputable mailing repair for soldering as none of the local game stores can do it.

Okay I’ve gotta question and everytime I try to google it I just see battery replacement related stuff but my question is if I get a GB operator I can download my saves and then obviously replace my battery if need be and then upload my save back and boom another 20 years of pokemon fun but my actual question is can I download my save and then play it on my PC and then when I wanna take it on the go upload it back to my original cart and all the info be updated?

I recently owned a Nintendo Game boy advance sp and It have a few problems.

First of all, when I charge It, after a few time the red led turns off and when I quit the charger and connect It again the red led turns on again.

Other issue is that it sometimes don't turns on unless i move the switch slowly and when It is in a medium point between on and of It shows de red led of low battery.

It's muy dura Game boy so I don't know if this is normal or I should return It.

Buenas comunidad es una de mis primeras publicaciones pero quiero contribuír con el fin de que ah alguien se sirva está información en un futuro.

Compré un Gameboy con esta falla que no cargaba batería pero si encendía con una batería entonces pensé ah de ser alto simple como la bobina m8, algún fusible f1 o f2 o cualquier cosa fácil de reparar pero no fue así revisando todos los puntos y buscando información en internet no encontraba la falla llegué a pensar que era el ic de carga y lo retire de otra placa y nada seguía en las mismas y revisando la placa tenía algo de sarro por la parte de atrás de la Gameboy limpie y todo y nada y la falla estaba en los orificios donde pasan esas pequeñas venas de alimentación del ic de carga las pinche con pinzas antiestáticas y alcohol isoporopilco y por fin dio vida empezó a cargar los puntos eran los que van a resistencia y capacitores al reverso de la placa ojo el ic de carga tenía voltaje y tierra para mandar carga pero no mandaba nada espero entiendan aveses no me sé explicar bien...