this is indeed a dell issue i had the same problem with my xps when i switched the cooler out. In my bios i was able to dosable cpu fan check and eliminated the bootup warning saying you have no cpu fan. Now do this at your own risk and make sure to monitor your temps with something like coretemp
Maybe I missed it, but I didn't see any option to disable the cpu fan check? Do you remember where in the BIOS? The XPS , being Dell's higher performance line, might have more BIOS options than the Inspiron. Will look again.
Already have core temp, but thanks for the recommendation! Great app.
Thanks for the help.