The power button flashes, beeps then turns off. It repeats this until I hard shutdown the computer? Here is a video of me trying to start up the laptop https://youtu.be/aCASaIUfZC8
try another hard drives common issue i found when hardrives died in a few my stepsons laptops had 1 or 2 die with 10 on them. fire it up with out a hardrive if it boots to bios might found 1 problem