Hp laptop probook 6550b won't turn on

@darrelelijah not sure why you disconnected your battery. Also, let us know which indicator light is orange. I suggest that you start off with the simple things. First you want to check your power supply. Make sure it has the proper voltages. Check the DC-in jack of your laptop. Make sure there is no corrosion, debris etc. that prevents it from working. After that you need to check and see if your motherboard even gets power. For that of course, you need to open it up. Post Some good pictures of what you see. That way we can see what you see Adding images to an existing question