amstrudy Posted May 30, 2018 Share Posted May 30, 2018 I have two Intellivision IIs. One turns on and doesn't display picture, but I think that's due to the super wiggly RCA port. I'll update this post once I investigate that. The other Intellivision II turns on and displays... something. Lots of random dots, lines, etc. It kind of reminds me of when the RIOT chip was broken on my Atari 2600, but since I have zero Intellivision experience I have no idea what the cause of the issue could be. I've attached a video in hopes someone can help me diagnose the issue! I cracked open the thing and dusted it out. No clear corrosion or anything, but I'm ready to do some multimeter-ing if needed! Thanks in advance. video-1527709060.mp4 Quote Link to comment Share on other sites More sharing options...
mthompson Posted May 30, 2018 Share Posted May 30, 2018 The video looks similar to what I was getting with my Intellivision I (details here). The fault turned to to be one or both of the transistors near the CPU chip (CP 1610). The Intellivision II board is somewhat different, obviously, but some of the other gurus who helped me will jump in here soon, I'm sure. Hopefully yours is as simple a fix as mine turned out to be. Quote Link to comment Share on other sites More sharing options...
mr_me Posted May 30, 2018 Share Posted May 30, 2018 If you want to check the voltages coming out of the power supply you can find instructions and the service manual here. https://console5.com/wiki/Intellivision_II Quote Link to comment Share on other sites More sharing options...
amstrudy Posted May 31, 2018 Author Share Posted May 31, 2018 (edited) Thanks for the link mr_me! I'll report back my findings. Edited May 31, 2018 by amstrudy Quote Link to comment Share on other sites More sharing options...
amstrudy Posted May 31, 2018 Author Share Posted May 31, 2018 (edited) Well, that's definitely a problem. Let's hope my soldering skills are good enough! Edited May 31, 2018 by amstrudy Quote Link to comment Share on other sites More sharing options...
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