1. Make sure you choose right printer model in configuration.h
2. load fail-safe setting after flash is done. otherwise many random thing will not work.
3. If you short anything while short JP37, and your z-axis is no longer working, it is possible your z-axis motor driver is dead, which is cheap to replace, you can try to swap step motor driver for x-axis and z-axis and see if the problem transfer to z-axis. Make sure you don't plug motor driver in wrong direction because most likely the step motor driver for z and e axis are opposite from x and y axis. read the following post "replace step motor driver" section for details.
http://www.soliforum.com/topic/16731/ho … updated-4/
(Da Vinci 1.0, Jr. 1.0 RAMPS, miniMaker) X4, (Creality CR-10S, CR-10 mini, Ender-3) X4, Anycubic MEGA X4, Anycubic Chrion X1, ADMILAB Gantry X2 (MonoPrice Maker Select V2, Plus, Ultimate)X4--Select mini X1, Anycubic photon X4, Wanhao duplicate D7 X1.
iNSTONE Inventor Pro X2, CTC Dual X2, ANET-A8, Hictop 3DP-11, Solidoodle Press, FLSUN I3 2017X1