HP EliteBook 840. I plug it in and the power light blinks and the cap lock light blinks. Nothing else happens. When I unplug it all power indications go away. I took out the battery for a period of time and pressed the power button, but that did not seem to help. What should I do?
power off the unit and leave unplugged from power , remove the battery https://www.ifixit.com/Guide/HP+Elitebook+840+G1+Battery+Replacement/50116then hold down the power button 30 sec, plug back in the power cord and see if it boots up,
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