Thank you for your help!
Basically the new trackpad flex cable is replaced and keyboard started to work, but trackpad is not. Ordered new trackpad and it did not worked, the old and new trackpads still dont works. So user said will use it with the external usb or wireless bouse, so laptop assembled back with new battery, and works well, no fans spinning fast. because I could not find schematics and boardview on 820-3787-06 but only 820-3787-A I could not be able to measure resistos on the way, but only voltages, which were present....

Device: Laptop
Brand: Apple
Model: MacBook Pro
Board number: 820-3787-06
Problem:[LIST][*]no keyboard, no trackpad[*]Fans Spinning fast[/LIST]Hello everyone. The MacBook pro late 2013 keyboard is not responses even when trackpad is disconnected.
no reaction on KB, only power button andd ctrl alt shift, which are on keyboard connectore are separately on the KB pinout KB backlight is present the PP3V3_S4 and PP3V42_G3H one keyboard connector J4813 are present on keyboard
external USB keyboard works Should touchpad be connected to motherboard for KB to be working?...