This not gonna be easy to fix. The over-the-top
connectors prevent the
use of an extender card, so I can't probe anything easily.
A general comment. When I don't have the right extender, or in cases like
this when you can't use one, what I generally do is solder some wires to
useful points on the board, put the board back in, and probe the free
ends of the wires. Don't try this on fast stuff, but for the 8/e it
should be fine.
-tony