I have a Toshiba Satellite P205 laptop. When turned on, the screen lights up dimly (not completely black), but there is NO picture. I have connected it to an external monitor, and it works fine on that. I replaced the inverter board and tried EVERYTHING but its still not working!

Did you check connection between the video cable and motherboard? It’s possible the connection is loose. I would try reconnecting the cable first.
You can access the connection if you go though steps 8-11 in this guide for Toshiba Satellite P205:
http://www.irisvista.com/tech/.....oard-2.htm

Theres no real way of diagnosing this without having a known good Screen.

This is correct.

What i have done in the past is remove the backlight lamp from a cracked screen where i know the backlight is in good working order. Then plug this into the inverter connector and switch on. If the back light lights up the problem is the back light in the screen, if it doesnt, its either the LCD harness Cable or the inverter.

I’m using exactly the same method. I have a backlight lamp removed from a 15.4″ and I’m using it for testing all laptops with backlight failure.

I described this method in the following post: http://www.laptoprepair101.com.....t-failure/

What i have done in the past is remove the backlight lamp from a cracked screen where i know the backlight is in good working order. Then plug this into the inverter connector and switch on. If the back light lights up the problem is the back light in the screen, if it doesnt, its either the LCD harness Cable or the inverter. I would probably change the inverter first in this situation then the lcd harness cable, both parts are fairly reasonable in the laptop repair world.

Hi, have a emachines g620 laptop, the lcd will only come on when the screen its at a 45degree angle and powered on. If its opened at 90degrees it won’t come on. The laptop has to be switched off and repeat at 45degrees to make it come on again. I have changed the intverer, could this be a faulty video lead ?

First, I would check connections between the video cable and motherboard/LCD screen. Try reseating the video cable connector on the motherboard. And then connector on the back of the LCD screen. One of the connections could be loose.
If reseating connections doesn’t help, it’s possible the video cable itself is bad. Try replacing the video cable.

My laptop’s sceen turns black right before it gets to the user part. The whole “windows” thing comes up fine, but then it goes black. I tried going into safe mode, but it didn’t work. I tried unpluging, taking out the battery, even just letting it rest, but nothing worked.

Is it a Toshiba laptop?
Here’s what you can try. Turn it on and wait until the screen goes black. After that try hold down the Fn key and press a few times on the F5 key. Maybe your laptop trying to output video on the external screen and using Fn+F5 keys will switch it back to the internal mode.
Can you test your laptop with an external monitor? What happens to the external video when it boots to the login screen?