Changed trackpad and battery, will not boot, reset smc & nvram
smc reset held down forces boot to the login screen. but after user selected the screen goes black with power off.
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Is it taking a charge? Has it had any contact with liquid? Can u tell us a bit about the history
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Yes, it is fully charged (100%). The old trackpad was replaced because of liquid spill, the new one has had no liquid contact. A new battery was purchased and installed because of the no boot condition.
