iMac boot up problem??

[BLDun]

I did a clean sweep and new install on an older iMac G4 and sold it to a fellow in CA. Said that when he starts it up the admin name comes up with a question mark beside it. i.e. the admin name is SHERRI? Then when he tries to enter the password assigned it won't take it. Any ideas why the question mark? and could this be the reason it won't take the password?

Thanks

 

[Hellhammer]

Tell him to reset the password (click "Resetting the original administrator account password")