THEY JUST OPEN LAPTOP AND HEAT UP GPU ON MOTHERBOARD.. The same problem i found in my laptop dell n5010. · 8 beeps has many possibilities, check following · 1) cable of display if found loose , disconnected then tight or connect in socket · 2) if cable is connected well, try external monitor, if it works on external monitor, display is dead, replace it · 3) if external monitor not working, and system is running but no display then GPU ball connection with motherboard are melt and disconnected. it can be fixed by various reflow methods · 4) if not working above there may be motherboard failure, ask expert and replace if need. · sometimes heat sink pipe (heat pipe ) stop working and so heat can not pe transfer from motherboard to atmosphere, so overheating and motherboard failure such as 8 beeps, disconnected GPU is resulted, heat pipe used by dell and other company have very long life so , 90 to 95% cases have not problem of heat sink pipe. · I REPAIRED MY DELL N5010 WITH SAME PROBLEM....ITS GPU IS OVERHEATED AND BALL(SOLDERING JOINTS FROM GPU WITH MOTHERBOARD ) MELT AND CONNECTION BETWEEN GPU AND MOTHERBOARD LOST. BUT AS DELL PROGRAMMER SETS 8 BEEP FOR BLANK OR BLUE DISPLAY. LAPTOP SHOWING DEAD DISPLAY OR DISPLAY WIRE/CABLE PROBLEM INDICATION. MAIN CAUSE IS THE MINI/MICRO GAP BETWEEN GPU AND HEAT SINK PAD.. HEAT SIN PAD DID NOT IN CONTACT WITH GPU CHIP. SO HEAT DID NOT TRANSFER AND OVERHEATING melt ball(SOLDERING JOINTS FROM GPU WITH MOTHERBOARD ) so connection between GPU and motherboard was lost.. i set my GPU by heating with proper way. do not try yourself without guideline. · Also u can install software speedfan(free download google it), so you can run cooling fan full speed for continuous heat throw from GPU. because dell programmed is set to run on temperature sensor. battery will consume power but it is safe for overheating in such case, and you need to set speed manually every time when starting laptop or after sleep mode, otherwise fan will not run and motherboard will damaged that can not repaired. · my laptop is 5 year old, still its running good. dell products are good.

Hi Claude, I appreciate your efforts. As you have mentioned already, the issue seems to be with the connection between the LCD and the video connector on the motherboard. You can try the old LCD screen with the new LCD inverter cable or vice-versa and see if that helps. Otherwise, it may require a motherboard replacement.Alternately, you can try to update the BIOS. Refer to this link for the BIOS update: http://dell.to/PSQskL. Before flashing the BIOS please check the following:* No external devices(except the keyboard, mouse and monitor) should be connected.* All other programs should be closed and documents saved.* The AC adapter should be connected during this process. The battery should be 10% or more than 10% charged. Click on 'Download File'>> click 'Continue'>> Click 'Yes' on User Account control if prompted>>Click 'Continue' on the Application prompt>> Click 'OK' on Select the folder where you want to unzip the files to (make a note of the folder location)>> Click 'Yes' on the next prompt for folder does not exist>> Click 'OK' on All files were successfully unzipped. >> If the installation wizard does not appear, go to the folder location>> select the Setup file >> Right-click and select 'Run as Administrator'>>Follow the installation wizard instructions. The laptop will reboot after this update. Hope this helps.Please revert for clarification.