On March 2020 I was lucky enough to obtain from my friend [MrTimes] a R4131D with its tracking generator against the payment of a more than reasonable amount of 💰. The instruments came fully aligned, however the analyzer presented a "narrow display" issue (the trace was compressed vertically, sorry no picture available) and so an external CRT monitor connected to the analyzer rear video output came along. I started using it in this configuration until July 2021 when all of a sudden the external monitor stopped functioning. I was able to verify that the problem was due to the external CRT being dead using a VGA→HDMI converter + external HDMI monitor, but this solution was not practical so I decided it was time to fix the issue once for all.