Sorry that my post caused such a reaction .... but there was perhaps a mistake from the beginning ....
Old64goat should have been advised not to attempt this reparation.
The Tektronix oscilloscopes were very sophisticated and considered the best analog oscilloscopes on the market.
This is paid when trying to repair them ....
I think that even if he was not handicapped, he would really have great difficulties to repair this oscilloscope ... then I understand that he wants to make his blindness responsible for his difficulties, but it is not .
Even with a lot of experience, a technician fails to repair 100% of the faulty devices ... it's not a failure, we must just accept this reality.
At least, he has certainly learned a lot of thinks with this repair, this is what is the most important
