My apologies. Apparently I haven't been clear in describing the problem. I have three "slabs": It is my Model 100 that is not functioning properly. It will sometimes boot but mostly does not display any life when I hit the power switch.
I have verified that its AC adapter is the proper polarity and puts out > 6VDC, that the AA alkalines are fresh, that the memory backup battery has a full charge and that the memory battery switch is set to "on". I have also verified that in spite of these facts the CPU is not outputting a clock signal. There was some question whether I was measuring the clock signal properly, but I was able to demonstrate measuring the clock signal on my Model 102. Using the same frequency counter and technique, the Model 100 does not display a clock signal. The reason for this appears to be that the +5VDC supply to the CPU is only +0.23VDC. The question now is what is causing this to occur. Somewhere between the AC adapter's input jack and the CPU power is being lost. It will be a formidable task for me to identify which of the components, which number in the hundreds and include capacitors, resistors, diodes, transformers and more, are failing. But I'm learning as I go, and I thank you all for your suggestions. -CH- <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> Virus-free. www.avg.com <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
