I have a Toshiba laptop which has a broken LED screen the screen was broken in transit, therefore you can assume that it was not handled with care. Whilst it was broken it still worked, therefore I purchased a replacement screen.
Now, I have changed a number of laptop screens but never an LED one and noticed that it did not have an inverter but had circuitry taped onto the rear of the monitor which acts as a backlight, therefore only one connector. Great, I swapped over to the new screen powered up, nothing, I swapped it back onto the old screen, still nothing. I did this half a dozen times.
My first thought was that somehow I have knackered both the screens, therefore I took another laptop which had the same screen (Samsung) and connected both the damaged screen and the new one, they both worked perfectly.
Therefore there is something wrong with the Toshiba itself, now could it be coincidence and that the video cable has become dislodged? I doubt it as it was working before I started, could the video card be damaged?
Do you have any suggestions as to what could cause this? I am happy to take the laptop apart if needed, but what should I test?
One other thing, after I had changed the screen the first time and had connected it to an external monitor, I turned the laptop on and the charge indicator stated 85% plugged in not charging which i thought was strange, I decided to remove the power cable and the laptop immediately died as if there was no battery attached, just like pulling the plug on a desktop. I did this twice!, I then removed and replaced the battery re powered and everything was fine 85% plugged in and charging, removed the power cable and the laptop continued to work on battery power.
What may have caused this to happen? Could this be anything to do with the screens not working? Note that the screens were not working before this happened, but could something prior to this when I first connected the battery after changing the screens caused the malfunction of the screens.
Any help or advice would be greatly appreciated