Got to ask this
Is it a black screen with white writing
Cos i had that with only 1 game on my M3 when i 1st got it
After updating the firmware it worked fine
I think the game was Super Mario
If memory serves me right
did you find out the answer to the problem you were having ??
i dont know if this is the same, but my daughters done the same after working fine (same error message). i was going to change the firmware but before i did, i noticed that the micro sd card was full, so there was no room to create the game saves, i deleted a couple of roms and hey presto its working just like it should roud: