Looks like you don't have a common jumper for each segment, just the High or Low jumper. I've seen some of those that have horizontal jumpers across the neighbouring pins for high/low.

Oh well, its not too much of an issue - the case still has the Turbo on/off led, so that's OK. Well, if I can figure out how to solve the rom checksum error....

Well as luck would have it I came across what appears to be a very similar case to yours. Unfortunately, looking at the picture above, the Turbo display jumper panel appears to be different.
Regardless, here are my findings presented in this spectacularly crappy diagram:

Each segment has a T shape jumper (shown in red on the top row). The T's are inverted and interlocked for each consecutive segment.
The vertical part of the T is common (the segment is on regardless of turbo mode enabled or disabled)
The horizontal part of the T has three pins, you place a jumper over the middle pin and one of the side pins. One side makes the segment light up when turbo is enabled only; the other side for turbo disabled only.

It's basically just experimentation to find out which segment applies to which set of jumpers, and which side is for turbo enabled/disabled.

As I said above, the jumper block you've got looks like it has no common jumpers, just two for each sgement for either turbo state. However. maybe someone else will find this helpful in the future.

I have found that my AT case have full the same turbo display panel as megatron-uk have: S-305H
I have played with these "T"-s and I have made a drawing who-is-who:

As DonutKing has written the vertical part of the T is common.
A few days later, after that I have finished the drawing, I have found an original "system display & cable assembly instruction"
for G-568, K568, K569 and S-305H. 😀
I have scan it, enjoy:
http://gona.mactar.hu/turbo_display/AT-case_s … er_settings.jpg
The same as but half size:
http://gona.mactar.hu/turbo_display/AT-case_s … s_half_size.jpg

Did I saw a SNES with the controller? I think I did!

What did you use to clean it?

come over to American i'll give you all the AT cases i have.

I just bought a DX2-66 system at the thrift store with this EXACT case (except its beige) for $5.00

fun stuff!

ncmark wrote:

You could make your own "286 inside" badge 😁

actually you can, I was gonna do something similar with a chrome back badges you can have printed off.

😀