Battery replacement results black screen yet there is starting noise
I just replaced my MacBook Pro late 2016 with new battery from ifixit. Unfortunately the battery seems defect, and measuring shows near zero voltage. However, after the installation the machine start to turn on and I hear the starting noises goes off but there is no sign on the screen and the touchpad also off. I do get voltages out since I tested charging my iPhone through one of the usb-c output. Also, the keyboard also seems alive since the Caps button lid green and also I used it when I resit the SMC and the PRAM. I have also tried an external monitor but it didn’t work. Now I have removed the defected battery but to run it on direct power. Unfortunately, still the same issues. Please any help would be appreciated.