Response from Jonathan: Joe,   While we are not the best when it comes to color vector monitors, we’ll definitely try to help you out. I’m not sure how far you’ve made it in your repair but you might check out the Tempest troubleshooting guide from Repair FAQ if you haven’t already. It has a flowchart that should be able to guide you through the troubleshooting process. Here’s the link: http://www.repairfaq.org/REPAIR/F_VAtari7.html#VATARI_001. Of course, if you’re still having problems or if you have any questions about the guide you can email us back and we’ll help you out further.   Hope that helps. Thank you for your question and good luck with your repair.