My AES is fucking up with graphical glitches.

Ill be playing say, metal slug 4 and it'll be alright for about 3 missions and then all of a sudden the screen starts graphically screwing up. it'll chop of the screen into little blocks and rearrange them weirdly, alot like the NES when it got knocked in the middle of gameplay and froze all weird. Whats that mean?

could be a bad solder joint that loses contact when it warms up, or a failing power supply.

make sure all of your contacts on the cart and system are clean.