Re: Inspiron 15 5547 Won't Go Past Dell Logo Anymore
Just making sure, you're performing the F2 key( BIOS) and F12( key) correctly:
1. Power off system. Removed all peripherals. (except AC adapter)
2. Power on system, quickly start tapping F12 key continuously until you see Preparing one time boot menu in the top right corner of screen. In Dell Pre-boot menu, select Diagnostic. After quick tests finished, select Hard drive and then Thorough Test Mode.
Note: Please don't wait for Dell logo to start tapping, soon as you power on system, start tapping F12 key...