I tried loading YAART from disk but it white screens then goes back to the OS.

Can someone help a newbie please :oops: I've got a Atari 520 STFM that is acting weird and won't load games / software it gets into the OS that's about it, I think it's got a ram issue. Which version of DiagROM(s) should I use and the eprom type / location? It's a rev d, I've attached a picture of t...