Thank you LD,
I have service manual, I already checked those and got these results:
On I/o board, under CN27 TP1-TP6 I got 17kOhms but TP9, 13, 10 and 14 I got 13.8kOhms, under CN28 first 4 pins TP3, 7, 4 and 8 give 17kOhms but TP11, 15, 12 and 16 give 13.8kOhms.
On The Slider board all...