I have a n7110 17r, i got it used so there is no warranty on it. I got it around February of this year. Then one day around May the screen stopped working but the fan and everything else worked still. I decided to take it apart to see if the cable to the screen was on correctly but then when I put it back together nothing started working and there are no lights except for the Windows mobility center button (the one with 2 gears on it). It lights up as soon as i plug in the charger in the laptop with no battery or if the battery has some charge and I push the power button. Is there a way to fix this or is this laptop dead?
Download the service manual here - http://dell.to/2c6rRgA - remove the memory modules, disconnect the HDD / ODD and power on the system and check the exact # of beeps in a cycle. This will help diagnose the source of the issue.
Press and hold the fn key + power button - it should initiate diagnostics and if there is an error, count the exact # of beeps in a cycle and it will help isolate the source of the issue.
Connect an external monitor and check if the display works fine.
If nothing goes, I would primarily suspect the motherboard.
As there is no warranty, then you could contact our team to get a quote for a paid service call - http://dell.to/1vnT6CQ
Also, please click my DELL-username and write me a private conversation with the service tag and your contact details(Name and Email) for case records.