White screen when loading most roms with R4i 3DS RTS

I've got a R4i SDHC 3DS RTS from R4i-SDHC. I have not used it for some time and now when I try playing some games I get a white screen when launching them, but a few games work. I use a DSi XL with version 1.4.5 on it. All games used to work but don't anymore.

Pokemon Heartgold - White screen

Pokemon Platinum - White screen

Fire Emblem Shadow Dragon - White screen

Bowser's inside story - White screen

Phoenix Wright Ace attorney - Works perfectly

Some other games also work like Phoenix...

White screen when loading most roms with R4i 3DS RTS