"LCD not showing anything after replacement"に関する回答please check cable connect from LCD to board.
"Water damage need information"に関する回答open your HTC (remove back cover), remove battery and wait approx. 2 days, then you can switch on and back up all your data. HTC maybe still work for a little bit time after this.
"Why is my laptop not turning on"に関する回答try to remove battery, then plug the power cord and start Laptor without battery. If laptop is start, then replace your battery, else try another power cord, and if laptop is not start then you need to repair mainboard (power supply block on motherboard).