When your laptop displays inverted colors as on the picture above, this is an indication of a bad screen. On the image below you see a white band running from the top of the screen to the bottom.
This band appears right from the laptop startup and runs through the logo too.
The output voltage must be exactly the same as on the original adapter.
The output amperage has to be the same as on the original adapter or higher, but not lower.
I’ve never seen this kind of video output caused by a bad video cable or bad FL inverter board.
My laptop was fixed after I replaced the LCD screen. The laptop displays identical vertical lines all over the LCD screen as soon as I turn it on. When the same video defect appears on both monitors – internal LCD screen and external screen, then most likely it happens because of a bad video card.
When you plug the AC adapter the power LED and the battery charge LED light up.
When you press on the power button the laptop powers up but will not start. If the power LED lights up it indicates that the laptop is getting power from the AC adapter. You plug the AC adapter but the LEDs (power light, hard drive light, battery charge light, etc…) do not light up and the laptop will not react at all if you press on the power button.It is possible the laptop appears to be dead because the AC adapter is bad (and the battery is discharged).If you know that the AC adapter is working properly and it outputs correct voltage but the laptop is still dead, most likely you have a power issue on the motherboard (or power board on some laptops) and it has to be replaced.If you have to replace the AC adapter, make sure you use a correct one.If you have two memory modules installed, try removing them one by one and start the laptop just with one memory module installed.