Dell Inspiron 5720
F-8 is the key, Try to "cold start" the computer, meaning remove the power plug from wall outlet or uplug from computer, remove battery, now replace battery and plug computer into wall outlet. Push the on button while "TAPPING" the F-8 key repeatedly Tap, tap, tap, until you hear a beep or it load the black menu with safe mode options. IF THAT DOES NOT WORK: shut down the laptop,remove AC supply, remove battery. Plug the AC power back in,DO NOT INSTALL BATTERY, Start the machine, without battery installed, and tap F-8 repeatedly. If it still fails, PULL THE PLUG OUT OF THE WALL OUTLET WHILE THE COMPUTER IS STILL RUNNING. NOW PLUG THE LAPTOP BACK INTO THE WALL AND START, THAT SHOULD TAKE YOU TO A BLACK PAGE WITH WHITE SCRIPT WITH OPTIONS YOU ARE LOOKING FOR.
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