Question about Computers & Internet
Computer powers on and off but i have no screen on power up
If you have HDMI access plug in and get a display on a tv. Then unplug HDMI plug. For a brief moment you should see an image on the laptop display. If you don't see anything at all, then its probably not your back light.
Posted on Feb 09, 2012
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Posted on Jan 02, 2017
SOURCE: LCD Screen is black
It could be either, if you can get another LCD screen (same make/model) you can swap to ckeck it out.
You could check the inverter by touching its output and if you get a bit of an electrical shock then you know the inverter is working or check it with a multimeter if you don't like electric shocks.
Posted on Dec 28, 2008
1. Test using an external monitor. If it works, then either the screen bulb or the inverter board might be defective.
2. Test the inverter. Easiest way to do it if you have a good screen with a good bulb. Connect the good screen to the inverter board & test it. If it lights up, then the inverter board is good. If it did not, then the inverter board is bad & needs to be replaced.
3. If the inverter board is good, then we are left with the possibility that the screen bulb is bad. To fix this, we will need to replace the LCD screen.
Posted on Oct 06, 2010
No, the backlight comes already installed with the screen. The only other thing that that you may have to replace (and i doubt it) could be the LCD inverter, but that is not part of the screen but rather the part which provides power to the screen so it will light up.
you should be fine with just purchasing a new screen.
Posted on Jun 02, 2011
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