I bought this on eBay knowing it was dead. The front panel lit up just fine, but no display. I took off the covers and checked the voltages. All were good, except for the +5VDC, which had 2.5V ripple on it! I knew it needed new filter caps, but I didn’t have the time to take it all apart and put it all together again in one sitting. Otherwise it would have been a basket case. I sold it at yesterday’s Ham Radio Outlet parking lot Hamfest to a nice ham who has another 465 and wanted mine for parts.
Here’s a very large pdf 291 page service manual for the 465: https://www.dropbox.com/s/7db94tfqk3itqxf/465.pdf?dl=0
Here’s a 50 page manual in pdf: https://www.dropbox.com/s/qa3wnog651vun3g/465_v6.pdf?dl=0
Here’s a helpful guide to replacing the filter caps in the 465: https://www.dropbox.com/s/fwfoygiu2fxr0r4/Tek%20465%20Power%20Supply%20Capacitor%20Replacement%20Guide.pdf?dl=0
Here’s a manual in djvu format for the 465B version: https://www.dropbox.com/s/g1obgoyhqvx40vt/465b.djvu?dl=0
Let me know if you have any stories about the 465 family of oscilloscopes.