This is the first thing I saw when I turned it on. I never loaded a game but after a few power cycles, reseating the BIOS cart, and popping the SD card in and out a few times it eventually ran Third Strike.
I reseated SIMM1 and SIMM2 but I'm still having the same problem.
Sometimes when I turn it on I get a blank black, white or purple screen...
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Source: https://www.arcade-projects.com/threads ... 000.28369/