My current scangauge in the C1 is running firmware 3.15 and the one in my Speedster is even older.

Version 3.15 has some annoying bugs, especially speed related. So I asked Linear Logic about an upgrade option. The nice thing is that they provide two. You can either send in your complete unit or they send you a replacement circuitboard and you don’t have to return the old one! So I obviously opted for the second option :)

Installing the new circuitboard is pretty easy.

Remove the back cover of the unit by removing the 4 little screws and you’re left with the exposed backside of the circuitboard.

Lift it out of the case and remove the button strips from the front (between the display and the circuitboard).

Using a small screwdriver, carefully pry the catch for the flatcable that goes to the display loose.

You can now slide the flatcable out.

The LCD is connected through another connector to the circuitboard. Carefully slide it off.

Now we can swap over the circuitboards.

Don’t forget to remove the sticker from the RJ45 connector on the back.

Slide the LCD back on the circuitboard, reconnect the flatcable, slide the buttons back and reassemble the case. Now power on, and you’ve got an updated scangauge ;)