I have the exact same problem as this thread: http://gbatemp.net/threads/ez-flash-iv-wont-boot-games-on-my-gba-sp.363189/ I ordered a Ezflash IV from realhotstuff.hk (EZ402 2006.03) I didn't now where to get the 2013 version. I ordered a Trancend 2GB miniSD in a store close by. Flashed the original ez_up.bin and after that didn't worked I tried clearlooks, also didn't worked. Some problem as above and some games had a black or white screen. Cleaned the new MiniSD card and the newly opened Ezflash iv, also didn't work for me. Tried putting it in like a 50 times, also with no success. What can be the problem? Maybe a faulty Flashcard or faulty psram or something else I am trying different things now for almost a week.