Question Laptop monitor not illuminating... any ideas?

Dec 14, 2019
Not sure if this is the right forum for this question, but here goes....

I have an IBM L450 laptop, with a 14 screen. Few weeks ago, worked fine, next morning the screen is black. No light.

Actually if you look at the panel, you can see the screen and all the colours, just no backlight to illuminate it. ( I think...)

Looked up on the Internet, people said the inverter is shot. Bought one off ebay and installed. No change.

Others said the flouresent bulb is burned out. Bought a new one, soldered it in place, no change. Tried swapping the old inverter, no change.

I can use an external monitor fine. Laptop works great. Just no screen. Kinda defeats the concept of a laptop!

Dunno what else to look at. Any ideas? Hate to chuck the laptop. It works well. Hesitant to buy a new panel, thinking is that this one is producing a video signal, just no lights.....

Anyone have any ideas? Anyone have this on their IBM laptops?

p/s Thanks huydungmobile
Last edited:
It is possible that it isn't a part but is just a setting. Wouldn't be the first time.

Try this...

1. Go into "Control Panel" and then "Power Options".

2. Click the "Change plan settings" link next to which ever plan you are currently using and then click "Change advance power settings".

3. In this new window click "Display" to open up the listings under it.

4. Now locate and click each of the following..."Display brightness", "Dimmed display brightness" and "Enable adaptive brightness".

5. Change each of these to the settings you wish, then click the "Apply" button and finally the "OK" button.

You might also want to check the keyboard for a key that will dim/brighten the display. Not all laptops have them.

Now if none of this works, and the parts you got were OEM and new (not used/ebay and not aftermarket), then I would say have a tech look at it. However, if the parts were used or aftermarket, then I would try returning them and get the OEM part.
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