HI, I recently purchased the Ultimate SD Colecovision cartridge. I have a Colecovision with a bad memory chip. I ran the diagnostics using the cartridge and I received a failure code on the VRAM of 0x7143 [71,BF]. However I can't find any diagnostic codes that will help me identify which chip is bad. If you are familar with the test, I get the first white video screen and then I get the error. I appreciate any help. I have looked for this code or even part of it, but I can't find anything in the documentation I have found so far.