[NAME]   [NAME]  Non  DELL fans will have that error due to wiring issue OR too low RPM.   22 processor-fan connector (CPU_FAN) I own this model and I can reproduce the exact error from bios support assist.  The error is very specific and not related to hard drive or os etc.  You can remove all storage devices and it will still show up on the screen. If the fan is the correct one and IF Its plugged into the correct header and IF the fan is good it will work. [IMAGE]    
XPS 8930 motherboard shows on SA (SupportAssist) prior to booting up that "the (CPU fan) failed to respond correctly" Error code 2000-0511 validation 84543. Then allow me to continue and then shows >>Checking media presence...... >>Media present...... >>Strat PXE over IPv4, Press ESC key to abort PXE boot. Then I hit ESC and Windows 10 Pro starts normally. After that the motherboard works correctly. I have run the SA troubleshooting and it does not detect any fan issues. I have replaced the fan without success. Sequence starts every time I start or restart the computer. I have pics but this will not allow them to be posted.
XPS 8930, SA, CPU fan failed to respond correctly