If your PC experiences a black screen after upgrading to Windows 10.Please check Step by Step Guide to solve Windows 10 Black Screen.Today I have installed Windows 8.1 as I was facing black screen issue when I start the machine.
For a notebook, press and hold the Fn key and then press the power button.
If this does not happen, the problem is that the PC has not booted, so naturally the monitor cannot display anything.
Is the PC actually booting (fans running is no guarantee of a successful boot) When you think it should have booted, try the CAPS Lock key, every time you press it the CAPS Lock light on the keyboard should toggle off and on.
If the computer fails any of these tests, it will stop the start-up process.
Indications of a failed POST include: Note: For Dell Latitude laptop PCs, you may try to recover the PC using the forced e PSA method.