SGI Octane trouble: part 2

After reading up some more on the internet, I spent most part of the day trying to sort out the display problems I have with my Octane.

As described in my previous post, I cut a VGA cable in half to be able to rewire the connections using a breadboard.  As the leads in the VGA cable are a bit flimsy I soldered them to some sturdier wire attached on a test PCB that I cut to size.

So after a lot of soldering and fiddling around I had a breadboard setup ready to test out possible solutions.

The image above is as the wires would be in a regular VGA cable.  As this does not work I tried out a first possible solution, as described here.

But to no avail.  So I disconnected everything but the RGB channels.

Again, didn't solve the problem. So I tried out two other possible wire ups trying to match the pinouts found googling around:

VGA	13W3
1	A1
2	A2
3	A3
5	10
6	A1 return
7	A2 return
8	A3 return
12	2
13	4
14	5

VGA	13W3
1	A1
2	A2
3	A3
6	A1 return
7	A2 return
8	A3 return
11	2
12	6
13	4
14	5

Again, this did not provide any output on my DELL.

So, conceding defeat (for now) I just ordered an adapter that is 'guaranteed' to work with SGI machines, I'll see if it provides a solution.  For the moment I'm out of inspiration on how to solve this problem. I'll let you know if the new adapter was a solution or if I try out something new to get this working.