G5 5090 Service Manual

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System diagnostic lights

Power-supply diagnostics light

Indicates the power-supply state.

Hard-drive activity light

Turns on when the computer reads from or writes to the hard drive.

Table 1. LED codesLED light codes for component issues/failure in the product.
Diagnostic light codes	Problem description
2,1	System board failure
2,2	System board, PSU, or cabling failure
2,3	System board, memory, or processor failure
2,4	Coin-cell battery failure
2,5	Corrupt BIOS. Recovery image is not found or is invalid during auto BIOS recovery process.
2,6	Processor configuration error or processor failure
2,7	Memory failure
3,1	PCI or video card/chip failure
3,2	Storage and USB configuration error or failure
3,3	No memory detected
3,4	System board error
3,5	Memory configuration error, incompatible memory, or invalid memory configuration
3,6	Recovery image not found
3,7	Recovery image found but invalid

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