Well! After installing new batteries, and without plugging unit in to wall outlet, the ON light came on. I then thought I had diagnosed the problem correctly. I plugged in a microphone but the machine started blasting like a machine gun. Then I got to thinking that maybe the last owner, in an attempt to troubleshoot put one of the four connector plugs to the main board in the wrong place. Sure enough, I made a switch on two of the plugs, and machine gunning stopped. I picked up the microphone, and eureka, I was in business. the Karaoke Machine was working and I did not have to even test the diodes. The kids will be in their glee, and singing at Christmas. Oh my poor ears!
Thanks for bearing with me, and listening to me squalk on this one.
- This reply was modified 5 months, 3 weeks ago by Ralph Spracklin.