after reading I encorage myself to look into the lid switch only to find that it’s half stuck meaning if you close the lid it enter hibernation, but if it stuck halfway it only turns off the backlight.

I’m a fool for not checking the lid switch, I was really certain that this is an inverter or a backlight problem.
this case really adds my experience in laptop handling.

advise for newbie: CHECK THE LID SWITCH BEFORE DISMANTLING YOUR LAPTOP!!!!!

I have fujitsu siemens amilo v2010. The image on screen is very dimm. I tried good known backlight lamp, and it is not working. Replaced with new inverter, also no luck. Image is very dimm like backlight failure. Could it be video cable or bad motherboard?

Have a Compaq Presario C500,when turn it on,screen stays on for about 15 seconds then turns off but there is very faint image…have not tried external monitor (next step),do you know how to get disassembly directions fot this laptop?

Thanks for the useful site. I have a laptop which half the screen is completely black (the bottom half). When I connect the laptop the external monitor, it is no problem to display to external display. SOmetimes when I open and close the lid, it works fine but after a while, the bottom half of the screen freezes (i can not move my mouse over it).. I opened the laptop and check all
the cables from the motherboard to the LCD screen and inverter. Does this sound like a bad LCD screen?

Thanks
Leo

When I boot up the monitor works, then after a few minutes it fades to white, then grey. after about ten minutes, it comes back and works fine.

Ideas?

I respectfully disagree here I’ve seen many laptops where the lid-switch either both mechanical & magnetic version has failed.
It’s much cheaper & easier to find this switch attempt to clean or just disconnect it before buying a inverter/back-light on a whim. The mechanical switches can usually be cleaned or just manipulated until then start functioning again. The magnetic sensors range in price depend what else is on the PCB. Many types like Sony Viao’s require replacement of the track-pad. That is unless your happy unplugging the switch and using a external mouse

i think my problem lies within the backlights hinge sensor as the screen its self works fine and i get a display through an external monitor. the backlight switches on for a split second during startup and also will do when inserting or removing the connection for the external monitor it will also come on when the lid is in a near closed position but only briefly again. is there anyway i can bypass the hinge sensor through the settings or is it something i’ll have to get repaired?

I think it’s either bad inverter board (most likely) or failed backlight lamp (less likely).
It’s very unlikely that you have a faulty lid close switch. I’ve been fixing laptops for 5 years and seen very few failed lid close switches.
1. Try replacing the inverter board.
2. Try replacing the LCD screen (because it’s very hard to replace just the backlight lamp).

I just opened the laptop(dell inspiron 5150) to dust the fan and after closing it began to function but refused to display. I tried several times making sure that the video cable is okay but it still did not come up.
It displayed very fine on an external monitor but never on the lcd.

Try to switch video from external to internal mode using Fn+F8 keys.
Press and hold down the Fn key and at the same time press on F8 (try to press a few times if it doesn’t work).