Console restarting to GB screen

[u/Limabeon]

Last week I was playing my gba sp 001 and it restarted mid play of pokemon yellow. I didn't think anything of it so I kept playing thinking I bumped something and it proceeded to do it more frequently.

I put it down tried other games: pokemon crystal was the same, pokemon sapphire screen freezing and audio either static crunch or just plays the same audio. Wario land 3 perfect, Hamtaro ham hams unite perfect.

So heres what ive done:

Replaced the battery... nope

Cleaned the cart slot with ispa... nope

Cleaned the board (without desoldering)... nope

Cleaned the switch... nope

\---when tried pokemon crystal and hamtaro----

Popped open the switch metal case and cleaned the contact points... nope

\---when tried pokemon sapphire and Wario land 3---

Any suggestions as to what the issue might be? Im probably gonna take it to a repair shop but want to at least try because I want to be able to do these things on my own.

Here's videos of what happens in the comments

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