On Thu, 20 Sep 2018 07:11:02 -0700 (PDT), Tim R
wrote:

On Wednesday, September 19, 2018 at 5:16:35 PM UTC-4, Chuck H. wrote:
David,
As you surmised, the problem was the power tact switch. I didn't check
it because

Even though I know better, I have screwed diagnosis many times by thinking I knew what the problem might be and going down the wrong path. It's almost irresistible sometimes.
You bet. I spent 47 years repairing consumer , pro audio, television
studio, video conferencing, and server equipment. Though retired, I
shouldn't have slipped this much.