If you are talking about Bios password for dell showing Service tag with system disable problem,
it is now unlockable by using this page, [link|https://www.biospro.com/dell-system-disable-bios.html|https://www.biospro.com/dell-system-disable-bios.html]
If you are talking about Bios password for dell showing Service tag with suffix please see the big list
[link|https://www.biospro.com/dell-bios-password-reset.html|https://www.biospro.com/dell-bios-password-reset.html includes 8FC8]
the master password worked in my computer store, so try it out and let us know.