I bought an NES clone from the bazar for 3€ on a pile of rubbish 
I went home and opened it to see if there are any shorts or defects on it, but it did not seem like it.
As I do not own a proper adapter to power the clone I connected a battery to power it (the clone needs 9V to work)
For some time it played really well, also NTSC games that did not work on my PAL NES showed the sprites in proper order. But then it went crazy and now it only shows wrong sprites. The game mechanics and music is working like it should.
The clone is a SUPER COM 72 and has 1000000in1 games already built in(just a famicom sized 60pin cart soldered to the clone and a chip that acts like a switch for switching to the inserted cart if there is one inserted.
I hope it is nothing to bad, so I can fix. If anybody can do something with the information I shared on this and is able to help me out with that, I would be really happy
Thanks in advance.
Ps: if needed I can provide more pictures.

I went home and opened it to see if there are any shorts or defects on it, but it did not seem like it.
As I do not own a proper adapter to power the clone I connected a battery to power it (the clone needs 9V to work)
For some time it played really well, also NTSC games that did not work on my PAL NES showed the sprites in proper order. But then it went crazy and now it only shows wrong sprites. The game mechanics and music is working like it should.
The clone is a SUPER COM 72 and has 1000000in1 games already built in(just a famicom sized 60pin cart soldered to the clone and a chip that acts like a switch for switching to the inserted cart if there is one inserted.
I hope it is nothing to bad, so I can fix. If anybody can do something with the information I shared on this and is able to help me out with that, I would be really happy

Thanks in advance.
Ps: if needed I can provide more pictures.