Hello, I've had a problem with this laptop for a while. I've replaced the motherboard after it died, and it was seemingly working fine after, but it stopped powering on after I shut it down. if I remove the battery connector and plug it back in, it will boot fine, but if I shut it down again it will not power up after that until I unplug and replug the battery in. When I press the power button the caps lock light will light for half a second but will not boot. I've tried replacing the RAM and the battery but still the same issue. The only thing I've found to get it to turn on consistently was...