Laptop Display Issues – Screen Turns Off When Power Cord is Removed

Could be a lot of possible reasons, here are my guesses:

1. It could depend on your mouse, I've had mice that even while completely still on a table send a very minor cursor movement signal back to the PC. Try unplugging the mouse to see if that's the cause.

2. There are applications that actively prevent windows from turning the screen off, full screen video is the obvious one, there may be something else you have running, check your background applications.

Original chargers often implement a protocol to tell the laptop that they support sufficient power (=Watt) to charge the laptop. If the laptop can't tell that it will have enough power it will go into a low power state where it doesn't charge the laptop.

This can happen because:

• The charger can't deliver enough power.
• The charger is broken and can't tell the laptop that it delivers enough power.
• The charger doesn't know how to tell the laptop that it can deliver enough power.
• The laptop part that should listen to the charger is broken.
• A software/driver failure.

Quite often the problem is the charger. Try to borrow an original charger from someone to test it.

Edit: If e.g. the new charger is 90W and the old charger is 120W, the expected behavior is that the battery will not charge, even if both chargers are from HP.