First a question: Is LA7612A the same as LA7612N? Second thing: With the help of Robert and Google I now have troubleshooting techniques for the Gemstar 4 modules with the built in micro. I determined that the data line going into the Gemstar is low (2 volts) and the Gemstar is good. I traced the data line back to the T chip, LA7612A, and a funny thing happened: I disconnected one leg of R12710, and my data line jumped up to 5.2 volts (which is good). T chip must be bad. But then, I reconnected R12710 and disconnected pin 44 (which is on the other side of R12710) of the T chip, and my data voltage went DOWN to 1.6 volts. My clock line also went low (pin 43). What is going on here? I repeated the above test twice to make sure I wasn't seeing things. Thanks. Kevin Wilks Kevin's TV & Video Repair Penticton BC Canada kevintv@xxxxxxx ***************************************************************************** Classifieds! Buy or Sell! http://sell.tech-assist.org The Tech Address Book: http://www.tech-assist.org/secure/tip/contact.htm Add a Repair Tip Here, or Change/Remove your Email Address: http://www.tech-assist.org/secure/tip/main.htm Lost Password: http://www.tech-assist.org and select "Lost your Login Info?". Email Archives: //www.freelists.org/archives/techassist/