I don't know if the keyboard or mouse pad works. none of the connected parts are tested and potentially anything could be FAULTY. DEFINITION OF FAULTY - SPARES FOR THOSE THAT FIND IT HARD TO UNDERSTAND.
Faulty ZBook 15u G3 DSC i7 6th Gen W/WWAN Motherboard System Board
Dell XPS 9560 (i7-7700HQ, 16GB, 1TB SSD, NVIDIA GTX 1050, W10P) - Faulty USB-C
JOBLOT 3x Laptops┃FAULTY, BROKEN TECH JOBLOT - HP, Dell, Core i5 i7 10th gen
Dell Latitude 7250 i7 5th Gen 2GB No HDD Faulty Display Touchpad Parts
Dell Latitude E5440 i7-4500U No HDD/Memory No Display Output Faulty No Charger
Dell Precision 3520 i7 7th Gen, Nvidia Q 620M M2 Port Faulty! Reed Description!