9100Bs freshly acquired, weird variations

[tubenewb]

(02-27-2019 05:26 AM)dramsey Wrote:  Bear in mind the little CRTs in the 9100s will take some time to warm up enough to display an image...

Well, I plugged it in and it did nothing but hum (from the power supply). I did, amazingly, run into someone who was trying to get this particular unit working years ago. They were having trouble with the replacement of a germanium diode (?) on one of the power supply boards. I see the replacement but it didn't work, apparently. That's where they left it, over a decade ago.