From Apple's website
-127 dsHMenuFindErr Could not find HMenu's parent in MenuKey
Apparently something that is needed at bootup is corrupted or missing. You may have to do a fresh install or at the very least track down which file is missing or damaged and replace it from the master disc. The spot where that file resides on the hard drive may also be damaged. You may have to map out any bad sectors before trying to fix the file or reinstalling. I don't know what sort of utilities there are to analyze the sectors on the hard drive for Macs, though. I am sure someone else here does.
-127 dsHMenuFindErr Could not find HMenu's parent in MenuKey
Apparently something that is needed at bootup is corrupted or missing. You may have to do a fresh install or at the very least track down which file is missing or damaged and replace it from the master disc. The spot where that file resides on the hard drive may also be damaged. You may have to map out any bad sectors before trying to fix the file or reinstalling. I don't know what sort of utilities there are to analyze the sectors on the hard drive for Macs, though. I am sure someone else here does.