Hp laptop acting crazy. It restarts fine, but when i shut down and try to start laptop it just cycles and nothing happens. I have to take out ram , unplug, take out battery and hold start button for about 1 min, then i re-install ram put battery back in then it starts. I have updated the bios to the latest. Have all the drivers , checked the heat, its running about 80 degrees f . I took whole laptop apart, cleaned out vents, put new thermal grease on cpu and gpu, installed new battery , tried 3 different power supplies, but still does the same thing. I have built many laptops and computers , never came across this issue. Im thinking something is wrong with the motherboard. Just doesnt make sense why would it restart fine, but when shutting down and trying to start it just cycles. Has nothing to do with op system, because without hard drive in it would do the same thing. I Would appreciate any help