My Monopoly has very early ROMs (CPU 203 & DSP 203). I have the latest versions from Stern Support (CPU 303 & DSP 301). The DSP 301 checksum is correct and works in the machine, but the CPU 301 checksum is wrong and doesn't work. The CPU ROM checksum should be $5EFF but I keep getting 06D35EFF. I'm using verified blank AM27C040 ROMs.
Anyone here have ideas? Screenshot of GQ Programmer screen attached...