Hoping for some beginner advice buying an oscilloscope.

[rayma]

If you have a computer, the cheapest new Picoscope is $165.
https://www.amazon.com/Pico-PicoSco...ocphy=9018951&hvtargid=pla-404289765070&psc=1

 

[1audio]

I can recommend the Picoscope line. I have used them for years. However they are not as quick for troubleshooting as a stand alone device.