Here is what I have done to fix an Asante MCiLC.
The card I have looks like it was designed for both TP and coax, but then a version of it was made with the coax components removed. Unfortunately that version still has the media detection and switching circuitry present, which suffers from...
Here are schematics I've made of the media sections of the Rev B2 and Rev G
To do a full conversion of a Rev G to remove coax and the problematic TP link detection circuit, it looks like the AUI/TPI pin of the DP83902 can be connected to the AUI detection circuit by removing the link at R45...
Another solution, the problematic link detection circuit can be made to work by changing R28 from 36K to 220K. This increases the time allowed between detected link pulses to be long enough to allow for Auto MDI-X. I've tested this on a Rev B2 and a Rev G card, with a TP-Link TL-SG1016DE...
I have a Rev G I also want to modify. Your hack is good, it is the most direct way to force TP only. One refinement I think makes sense, is to actually install JP1. The way JP1 appears to work is to disable the coax circuitry when it is installed. With JP1 off it is dynamically disabled by the...
There is probably a way to modify the Rev G so that the jumper JP1 can still switch between AUI and TPI.
With the Rev B1, do you know if it auto switches between AUI and TPI, or does that have to use the jumper JP1?
The problem with cards like these not working with anything but old ethernet...