Laptop Issues - Screen Lights up but no display

Did you check the data cable to the display?

John,

I hope that when you fitted the new screen you got the details off the back of the old one.
The brand and model number.
Often the mistake is thinking that a screen of the same size can be used.
And if you check if it is lcd back lit, or uses a cold cathode white light array.
Via an invert board.

But the internal decode chip on the screen matters, in some cases.
Simply because at set resolutions the Hz range can be different.
What I am saying is if the last resolution in the laptop was set at 1600x1050 at 75 hz the screen would be black when loading into windows on the laptop screen.

The resolution and display Hz may differ with the new screen. So the prior settings of the old screen are wrong, but still stored in the windows resolution table.

If it at least shows a boot when powered on it`s the case.

All you have to do with another monitor is set the resolution lower.
Or go into safe mode and remove the video driver and let window reboot with the laptop screen enabled.

When you install a video driver it talks to the lcd screen via signal to the graphics chip set it tells it what resolutions it is capable of at what hz, or screen refresh rates.
The driver or windows stores this as reference.
But if the screen differs, it will not do it on a second run or replacement, because it has already performed the operation.


Then re-install the video driver.

The Second is to Try the FN key together with the Switch display F key.

If you can use a meter to read the screen in continuity, while it is connected to the board without battery or power adapter on it.....
Better still get specialist service