Quoted from hawkeyexx:
Thanks for posting I was going to do voltage test before buying a new DMD. I'm going to install NVRAM.
Good. NVRAM is an easy install for DE games since the old RAM is already in a socket. http://www.pinitech.com/products/6264_nvram.php
Start with section 4.7.6 to be sure you don't have a burnt wafer connector at CN1. If F7 (1/2amp) fuse is blown on the power supply, no doubt the high voltage section will need to be rebuilt. http://www.pinwiki.com/wiki/index.php?title=Data_East/Sega#Small_128_x_16_DMD_Display
Also check the 2 (5amp) fuses that are mounted on the metal sheet in the backbox just below the power supply.