HP EliteBook 840 G3 not opening

[williamghost37]

Laptop HP EliteBook 840 G3 not opening,

1.Complete black screen
2.Charging light flashing when I plug in the charger.
3.Caps lock key slow flashing when I rapidly click it
4. The battery is inside the system and I can't open the system *nor I want to, because it's an office laptop*

Someone please help me
Please help me fix this today ASAP.

 

[webworkings]

Try this...

1. Turn the laptop off (not sleep or hibernate but off).
2. Connect an external monitor to the laptop.
3. Turn on the external monitor.
4. Turn on the laptop.

NOTE: You may have to press an "external monitor" button. Could be the f4 button or a button with two monitors on it, for the external monitor to work.

If you can see fine on the external monitor, then your attached display, or the ribbon cable that connects it, are your problem.

If you can't see on the external monitor at all, or the problem occurs on the external monitor as well, then it is probably the graphics card/GPU that is the problem, which may require the motherboard be replaced.