I have an HP Probook 4530s laptop that has stopped charging when plugged in. The battery has been replaced recently. I've taken the battery out, pressed the power button for 15 seconds to discharge and then plugged the power charger in but it will not power up. I'm thinking it could be the power cord/charger so I've ordered a replacement since it's the original. One thing that I did notice, when I plug the charger into the laptop, right next to where it seats into the side of the laptop there is a small light that will flash 5 or 6 times then go out. Does this mean anything?