No Option for "High Performance Mode" in Energy Preferences

Try:

Resetting MacBook and MacBook Pro Power Management Unit (PMU).

Repairing the Hard Drive and Permissions

Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger and Leopard.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now restart normally.

If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.

If this doesn't help then navigate to /Library/Preferences/SystemConfiguration/ and delete these files:

com.apple.PowerManagement.plist
com.apple.PowerManagement.plist~orig

Reboot the computer.

That would suggest logic board failure. Try the diagnostics to see what if anything it reports:

How to run hardware diagnostics for an Intel Mac

Boot from your original OS X Installer Disc One that came with your computer. After the chime press and hold down the "D" key until the diagnostic screen appears. Run the extended tests for a minimum of two or three hours. If any error messages appear note them down as you will need to report them to the service tech when you take the computer in for repair.

Some "common" error indicators:

SNS - sensor error
MEM - memory error
HDD - hard disk drive error
MOT - fan error

Then take it in for service.

You definitely have a hardware problem based on the error code.

Hi,

I have been having problems with my macbook for some time. A recent hardware diagnostic fetched an error code 4SNS/1/40000001:VGOC-0.941

The computer would not boot, Neither from the internal HDD or the Installer CD.

Suggestions any??
Manik

There is a hardware problem that needs repair. Take the MBP in for service.