Hi Pinfans!

I am having a serious trouble with my Hurricane.
All of the switches are marked closed on the first row including the slam tilt switch.
(even the not used switches are appeared)

I have done the switch matrix test on CPU board according to Clay manual.
(removed the connectors and checked with a wire)
According to the test all switches are fine only one switch activated by touch.

Assumingly the error must be on the playfield (or wireing) but i am not sure.
i have checked the diodes all of the switches on the first row looking for shorted diodes but all are ok.
There is one switch for Ferris Wheel number 31 this is opto i have not checked this one but
as far as i know optos are not causing shorts.
Unfortunately i have not noticed and obvious ground short.

Any help will be appreciated!

switch-matrix (resized).png