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January 2001 – Apple Hardware Test for Power Mac G4 Cube version 1.1 – Download G4 Cube, will not work with any other computer. January 2002 – Apple Service Diagnostic 062602 1.0 XServe – Download XServe July 2002 – Apple Hardware Test for iMac version 1.2.2 – Download Apple iMac, Apple eMac. October 2002 –. The Mac Pro Early 2008 logic board includes a set of LEDs to help service providers troubleshoot the computer. The LEDs are located on the logic board between.
- Mac Pro Early 2009 Service Manual Repair Guide
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Original Apple Mac Pro Early 2009 Service Manual Repair Guide.
Repair guide dated April 8 2009.
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Mac Pro 1 1 Service Manual
Logic Board Diagnostic LEDs
The Mac Pro (Early 2008) logic board includes a set of LEDs to help service providers troubleshoot the computer. The LEDs are located on the logic board between the two DIMM riser card connectors. LEDs 3, 4, 5, and 6 are normally off and will automatically illuminate if an error occurs. To read LEDs 1, 2, 7, 8, and 9, you must press the DIAG_LED button, which is adjacent to the LEDs. To press the DIAG_LED button, use the nylon probe tool (Apple part number 922-5065).
Mac Pro 1 1 Service Manual Download
- Use the following table to interpret the LEDs.
Location | Name | Color | Nominal | Press DIAG_ LED button to display | Indicates |
Led 1 | Sleep | Red | Off; on when computer is in sleep mode | Yes | Sleep mode |
Led 2 | Standby (Trickle Pwr) | Yellow | On | Yes | |
Led 3 | CPU B Error | Red | Off | No | CPU B halts on an IERR (instruction error) |
Led 4 | CPU A Error | Red | Off | No | CPU A halts on an IERR (instruction error) |
Led 5 | CPU B OT | Red | Off | No | CPU B is over temperature |
Led 6 | CPU A OT | Red | Off | No | CPU A is over temperature |
Led 7 | GPU Present | Green | On | Yes | EFI has configured the graphics card |
Led 8 | Power Good | Green | On | Yes | All power rails are functioning |
Led 9 | EFI Done | Green | On | Yes | EFI is done loading |
Continue reading here: Led Cpu B Lower Processor Error Led Cpu A Upper Processor Error
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