I've emailed Philip and hope to debug it by email. I have access to a Comdyna 6 here and can walk him through it. I'm in California. Remote trouble shooting it tough but usually easier when the person at the other end doesn't know part of what they are doing. If they know too much, they tend to try to interpret too much, rather than just give me the readings. Dwight ________________________________ From: cctalk <cctalk-bounces at classiccmp.org> on behalf of drlegendre . <drlegendre at gmail.com> Sent: Monday, October 17, 2016 6:23:34 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: Comdyna GP-6 Analog Computer Repairs Needed Assuming the OP is an employee of the Christoval ISD.. Christoval Independent School District is a public school district based in the community of Christoval, Texas. Christoval ISD has two schools - Christoval High and Christoval Elementary. Address: 20065 3rd St, Christoval, TX 76935 Phone: (325) 896-2520 Christoval is in west-central Texas. Too far from me to be any help, at least in a local sense! On Sun, Oct 16, 2016 at 9:28 AM, dwight <dkelvey at hotmail.com> wrote: