1) TAKE OUT YOUR LAPTOP BATTERY
• 2) REMOVE YOUR AC ADAPTOR CORD, that's the wall power, remove it.
• 3) NOW HOLD DOWN THE POWER BUTTON FOR 30 SECONDS.
That will drain any static electricity that has built up on your laptop
system board and many times fixes the problem of a black screen. After
the 30 seconds re-connect your laptop to the wall power and hit the
power button normally and see if the laptop comes back up.
4- Replace your battery.
5-Restart
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