My cMP 3, 1 do not start, and I have this red leds on, at main board, just behind RAM... Could someone point the causes of this, and the solution?
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MP 1,1-5,1 3, 1 Red Leds, no Start up...
- Thread starter garibaldo
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ERRB = LED 3 CPU B (Lower Processor) Error
ERRA = LED 4 CPU A (Upper Processor) Error
Normally off. These LEDs come on if an error occurs or if the BootROM is corrupted. They do not
depend on the DIAG_LED button being pressed.
Related symptoms include no video or the computer is hung up. If the BootROM is corrupted,
the optical drive tray should eject, prompting for the insertion of a recovery disc to restore the
BootROM.
Troubleshooting:
- With the computer booted, up press the SYS_RST switch. If this clears the CPU Error LED,
check for incompatible device driver software that may have been installed for added
hardware.
- If the Error LED is still on, power down the computer and try resetting the SMC. Restart the
computer.
- Reset the power supply by unplugging the AC cord for 10 seconds.
- Unplug AC cord and remove any added DIMMs and PCI Express cards. If this causes the
LED to go off, repopulate the DIMMs and/or PCI Express cards to find the combination that
caused the LED to come on. Overheated memory could be a possible cause for this CPU
error LED to come on. Check fan operation.
- Unplug the AC cord and remove the battery for 10 seconds. You may need to remove a PCI
Express card to get to the battery. Reinstall the battery and restart the computer.
- Try swapping CPU A and CPU B locations. If the CPU Error LED follows the CPU, replace that CPU.
- Try replacing the logic board.
source: Mac Pro (Early 2008) Troubleshooting — General Information
ERRA = LED 4 CPU A (Upper Processor) Error
Normally off. These LEDs come on if an error occurs or if the BootROM is corrupted. They do not
depend on the DIAG_LED button being pressed.
Related symptoms include no video or the computer is hung up. If the BootROM is corrupted,
the optical drive tray should eject, prompting for the insertion of a recovery disc to restore the
BootROM.
Troubleshooting:
- With the computer booted, up press the SYS_RST switch. If this clears the CPU Error LED,
check for incompatible device driver software that may have been installed for added
hardware.
- If the Error LED is still on, power down the computer and try resetting the SMC. Restart the
computer.
- Reset the power supply by unplugging the AC cord for 10 seconds.
- Unplug AC cord and remove any added DIMMs and PCI Express cards. If this causes the
LED to go off, repopulate the DIMMs and/or PCI Express cards to find the combination that
caused the LED to come on. Overheated memory could be a possible cause for this CPU
error LED to come on. Check fan operation.
- Unplug the AC cord and remove the battery for 10 seconds. You may need to remove a PCI
Express card to get to the battery. Reinstall the battery and restart the computer.
- Try swapping CPU A and CPU B locations. If the CPU Error LED follows the CPU, replace that CPU.
- Try replacing the logic board.
source: Mac Pro (Early 2008) Troubleshooting — General Information
Y
Thank You very much, I will try to solve this issue during th next week and report back...