I like the way you think! I have a pile of older equipment, most of it works, the rest is still "in progress".
This brought to mind a Sony amplifier I bought surplus 30 years ago. Until this year, I never had the thing work! Before I bought it, many others had tried and failed to get the felt channel to work. I know this because an aquantance of mine had tried repairing it when he was a tech at the university where I purchased it from.
Over the years, I would pull this out and see if I could get any life from it. The problem ended up being the bias diode that was secured to the heatsink. Although it tested fine with an ohm meter, everything pointed to this component. I ended up replacing this diode with a red led and a 1N4148, connected in series as I needed this potential drop to match the original diode, which has long since been discontinued. I am sure that the thermal characteristics of this arrangement do not match the original, but the amp sounds great, and matches the right channel when bench tested.
Some times ingenuity goes a long way, especially with vintage equipment!
The management response to a problem solved and equipment now working is priceless basically stating that the way you did it did not solve the problem. That is a big pile of management.
Steve, I can see why you did not pursue the discussion with your manager. If you had fixed a design flaw in the scope it would have called into question all their other purchases. This might have been a problem when using the equipment to verify designs.
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