SYSTEM FAILURE CODES

Sad Mac Error Codes
If a Macintosh fails at Startup, you will se a Sad Mac icon and a six digit error code.  If a Macintosh fails at startup, you will hear a series of error chords.
Sad Mac error codes can mean that the computer has failed the internal diagnostic tests and you have a hardware problem.  Sad Mac codes can also have a less serious causes such as:
A non-system disk in the default drive
Code Meaning Code Meaning
01_ _ _ _ ROM test failure 0F0006 Overflow trap ? TRAPV instructions2
02_ _ _ _ RAM test failure (bus subtest)1 0F0007 Privilege violations2
03_ _ _ _ RAM test failure (bus subtest)1 0F0008 Trace trap2
04_ _ _ _ RAM test failure (bus subtest)1 0F0009 Trap dispatcher error2
05_ _ _ _ RAM failure (address uniqueness) 0F000A Line 1111 trap2
0F0001 Bus error2 0F000B Other trap2
0F0002 Address error2 0F000C Unimplemented trap executed2
0F0003 Illegal instruction2 0F000D Interrupt button, programmer’s switch2,3
0F0004 Zero divide2 0F0064 Bad System file2,4
0F0005 Check trap ? CHK instruction2 0F0065 Bad Finder 2
  • The first two digits indicate a ram failure; the last four digits identify (in hexadecimal) the suspected bad chip.  Try removing the SIMM’s, rubbing the connection area with an eraser to improve the connection, and replacing the SIMM’s.  If this procedure doesn’t help, isolate the bad SIMM
  • "0F" indicates a software error ? the startup device was spinning before the failure occurred.  Try (1) Restarting the computer with the <Option> and <Command> keys held down (rebuilding the desktop) or (2) Replacing the System file.
  • Check the interrupt button ? it could be stuck.
  • The System file may be missing from the startup drive

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