Hello Keith, In Step 4 of the article, it says: 4. Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears. Whenever I turn on my Macbook, I hear a musical chord a couple of seconds after powering up the machine. Does the sounding of this musical chord coincide with a gray screen appearing? Thanks. Mike From: macvoiceover-bounce@xxxxxxxxxxxxx [mailto:macvoiceover-bounce@xxxxxxxxxxxxx] On Behalf Of Keith Reedy Sent: Friday, 29 May, 2009 16:21 To: macvoiceover@xxxxxxxxxxxxx Subject: [macvoiceover] Resetting your Mac's PRAM and NVRAM http://support.apple.com/kb/HT1379