If I may be forgiven for mentioning this for the second time in a few weeks... I just went through this exact same repair with the 1GC1-4210, made my own board, and have traced a (very limited) area around the divider, documented here? :
Also have a YT video about this E4402B that should be easy to find.
Could you tell me what you see? in the System (2) -> Show Hdwrd page, at the line “50ohm 3GHz input” ? I'd like to compile a list of hardware revisions and correlate to the type of divider IC used.
fenugrec