deskthority

I've had the same issue with my Model F107 since I got it and restored it back in November. As far as I can tell, it's a grounding/shorting issue between the plates and the PCB. The case is metal, and due to the way the board is held together, it is in direct contact with both the top and bottom plates of the inner assembly.

The problem I'm having is it's sending keystrokes in when I touch the case, and the more skin I have in contact with the case, the more characters it spams. So that makes my think it's a grounding issue, and the more resistance I give the case, the more characters it spams. It starts with a few keys on the numpad with just a light touch with one finger, but if I touch the case with my full two hands it spams every single key on the board as fast as Windows will register them. I've had Windows crash before because of so many keystrokes coming in all at once.

It could be that the case is not grounded properly. Check inside and see how the case is connected to the PCBs ground point

Wrap the electronics in plastic to isolate them from the case and add rubber washers everywhere.

Is this with xwhatsit or a stock controller?

Make sure all the screws are fully in. On my XT which is a similar design the screw which holds the PCB in place is actually used for earthing. Also in mine there is a sheet of plastic which covers the bottom steel plate.

alh84001: I'm using an Xwhatsit controller.
acid2000: After doing some more poking around and experimenting, I have found that there is a pressure based short somewhere in the inner assembly because I can produce the same effect by squeezing the inner assembly with my hands. If I fully screw down the screws it spams so many key inputs so quickly that I've had it bluescreen Windows before.