+grips03 Posted January 18, 2014 Share Posted January 18, 2014 I have several Intellivision consolesIntv2Searsmultiple 2609setc.Today I was using one of the 2609s and all original carts work ok. In truth I tried ~20.However these 3 carts do not work, I get a green screen with nothing else.D2KDK ArcadeMatch 5These carts do however work fine Intv2 and Sears and my 2nd 2609.Christmas Carol, Hover Bovver, Defender of the Crown also work fine on this "broken" 2609. Any ideas on how to fix? Quote Link to comment Share on other sites More sharing options...
+grips03 Posted January 18, 2014 Author Share Posted January 18, 2014 I checked power supply voltages and they are all ok Quote Link to comment Share on other sites More sharing options...
+BBWW Posted January 19, 2014 Share Posted January 19, 2014 Just send the broken Carts to me. Quote Link to comment Share on other sites More sharing options...
+grips03 Posted January 19, 2014 Author Share Posted January 19, 2014 yeah, its not the carts, but something with this certain 2609. I might open it up and swap ICs around until it works, but if someone knew what to try ahead of time that would be great. Quote Link to comment Share on other sites More sharing options...
+intvsteve Posted January 19, 2014 Share Posted January 19, 2014 (edited) Maybe a bad contact or connection on the port itself? Kinda unlikely, but what if, when accessing the ROM, some line isn't properly connected, and results in bad data transfer? Same applies if there's a bad connection from the port to it's destination. I suppose it could be RAM, too, and some games use a certain address that's bad on the unit in question. If you have a test cart or multicart, run the MTE-201 test, which should diagnose bad RAM. Edited January 19, 2014 by intvsteve Quote Link to comment Share on other sites More sharing options...
+grips03 Posted January 20, 2014 Author Share Posted January 20, 2014 no MTE-201 cart here, I wish I had one Quote Link to comment Share on other sites More sharing options...
HunterZero Posted January 20, 2014 Share Posted January 20, 2014 First instinct is system RAM going bad. I had everything but Demon Attack and D2K working and it was RAM. - J Quote Link to comment Share on other sites More sharing options...
+grips03 Posted January 20, 2014 Author Share Posted January 20, 2014 First instinct is system RAM going bad. I had everything but Demon Attack and D2K working and it was RAM. - J do you know their location on the PCB? Quote Link to comment Share on other sites More sharing options...
HunterZero Posted January 20, 2014 Share Posted January 20, 2014 (edited) Yup. Chip U2. - J Edited January 20, 2014 by HunterZero 2 Quote Link to comment Share on other sites More sharing options...
+grips03 Posted January 20, 2014 Author Share Posted January 20, 2014 (edited) Yup. Chip U2. - J now I just need the jaws of life to open the metal shield Edited January 20, 2014 by grips03 Quote Link to comment Share on other sites More sharing options...
HunterZero Posted January 20, 2014 Share Posted January 20, 2014 Haha! Yes it's a pain. Use a soldering iron and solder sucker. Be careful as the shield is connected to ground traces on the pcb. Quote Link to comment Share on other sites More sharing options...
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