Good news is that the field service guide covers this issue, the bad news is that if its not the RF or the regulator tracking down the exact faulty part is... Tricky. Its classified as a "logic failure" and diagnosing it may require an o scope and the STC (kluge) cart. Common parts failing in this issue, other than a shorted or broken trace are 6507, RIOT, TIA, X200(3.579575mhz crystal), Q200(2N3906 transistor), or just the RF modulator itself.
All these parts, the field service guide, STC cart can be ordered at
If you just want to see the field service guide you can download it at
The person who copied the document goofed and didnt include thr schematics for the ver 16 board, but if you need it I can make a scan of it for you.
PS if you want to get the full service kit also order the diagnosic cart and the shorting plugs set.
Edited by Syntaxerror999, Fri Apr 20, 2012 4:02 PM.