i never found out ether they all tie to ground when switched on ( at least mine did ) but i could see no change at all . possibly its something to do with layout ?komodo wrote: ↑By the way, how should the jumper switches be set on the bottom of the keyboard?
Be VERY mindful of the ribbon cable they can disconnect from the board very easy and its not as fun as you would think replacing them .
Other advice i can give as a 122 owner is that plastic is very very brittle don't drop it or twist it or anything treat it like antique porcelain.
Its painted don't rub too hard when cleaning my usual advice applies a good soak in warm to hot water with washing powder ( the bio kind works best)
Stabilisers are very fragile consider switching to model M style stabilisers where possible.
The foam matt may not be as bad as it look the edge is made of a thinner different foam the insides may be ok.
When bending back the tabs to open the plate do it very slow don't just bend it in one go slowly move it the metal is starting to age now.
use your extra number pad button for a tab key its so useful.