Good Day,

a good write-up of the above conversion from a CRT to an inexpensive LC-Display can be found here:

https://www.eevblog.com/forum/testgear/tek-tds540-crt-to-lcd-conversion-experience/

I have no association with the user "TimInCanada" who has done this, but as we have seen similar questions in this group quite often, I wanted to share this.
Tim has included some useful photos, too.

Cheers,

Magnus