bouguerrahoussem5

have you try another cable also try to change usb port put to another one with new cable let me

http://www.ebay.com/itm/Toshiba-Satellite-L50-L50-A-15-6-Lcd-Assembly-Genuine-/322431970951?hash=item4b12716e87:g:GU8A... on ebay

first at all you have to update the bios from the website of hp second the if the laptop as you said is shown in external screen thats good thing coz you are sure for now that graphic card is ok third you have to test screen with another one no need to be same size just for testing if not working you need to test the spin between screen and laptop you screen is led as i assume it doesnt have inverter then leave comment

if you are familiar you can change the trackpad only if not you can order the palmerst (the upper case ) and change it

the fdmc is damaged if you run with charged battery the laptop will work but when get discharge you will not able to power on again it fdmc damage

start by login bios check if the usb are disabled then try to do resotre your windows to date that work fine if nothing happen you must pull out the motherboard and do the voltage test

download hirens boot 10.7 boot from cd you will see password tools press you will get active password changer then choose the driver then clock on password must change next login then press Y then restart when you get start screen just press enter twice

fn+f5 or just f5 try

wrong driver installed try to get the match driver

open the laptop then fix it with some glue