Hp laptop will not power up...at all. In fact the

1) You need to check the power supply itself to mkae sure it still puts out the DC voltage as indicate on the power supply.

2) You may have cracked solder joints at the DC input jack of the laptop.

look here for more info: www.insidemylaptop.com

Hello !

Either the power source, battery, power adapter, or power jack is faulty.

1. Power source - if connected to a power strip, flip the switch. Move to another outlet.

2. Remove the battery (disconnect cables, flip laptop, unlock and slide out) and try to power on with just the adapter. If it works, battery is faulty.

3. Power adapter to laptop is faulty. Replace. If you have an identical system to test (and it needs to be identical), try on another laptop.

4. Power jack - repair power jack (may need to be serviced).

Hope this helps.