- Notes, cautions, and warnings
- Before working inside your computer
- After working inside your computer
- Safety instructions
- Recommended tools
- Inside view of your computer
- System-board components
- Screw list
- Removing the stability foot
- Replacing the stability foot
- Removing the left-side cover
- Replacing the left-side cover
- Removing the right-side cover
- Replacing the right-side cover
- Removing the top-cover assembly
- Replacing the top-cover assembly
- Removing the bottom cover
- Replacing the bottom cover
- Removing the 3.5-inch hard drive
- Replacing the 3.5-inch hard drive
- Removing the 2.5-inch hard drive
- Replacing the 2.5-inch hard drive
- Removing the hard-drive cage
- Replacing the hard-drive cage
- Removing the power-supply unit
- Replacing the power-supply unit
- Removing the processor-cooling assembly
- Replacing the processor-cooling assembly
- Removing the coin-cell battery
- Replacing the coin-cell battery
- Removing the memory modules
- Replacing the memory modules
- Removing the solid-state drive
- Replacing the solid-state drive
- Removing the graphics card
- Replacing the graphics card
- Removing the VR heat sink
- Replacing the VR heat sink
- Removing the processor fan and heat-sink assembly
- Replacing the processor fan and heat-sink assembly
- Removing the processor
- Replacing the processor
- Removing the wireless card
- Replacing the wireless card
- Removing the antennas
- Replacing the antennas
- Removing the front-chassis fan
- Replacing the front-chassis fan
- Removing the top-chassis fan
- Replacing the top-chassis fan
- Removing the optical drive
- Replacing the optical drive
- Removing the front bezel
- Replacing the front bezel
- Removing the power-button board
- Replacing the power-button board
- Removing the rear trim cover
- Replacing the rear trim cover
- Removing the system board
- Replacing the system board
- System setup
- Troubleshooting
- Getting help and contacting Dell
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Alienware Aurora R8 Service Manual
System diagnostic lights
The computer POST (Power On Self Test) ensures that it meets the basic computer requirements and the hardware is working appropriately before the boot process begins. If the computer passes the POST, the computer continues to start in a normal mode. However, if the computer fails the POST, the computer emits a series of LED codes in amber color during the start-up.
The following table shows different light patterns and what they indicate.
| Number of Power LED flashes | Problem description |
|---|---|
| 1 | System board: BIOS and ROM failure |
| 2 | No memory or RAM detected |
| 3 | System board or chipset error |
| 4 | Memory or RAM failure |
| 5 | CMOS battery failure |
| 6 | Video card or chip failure |
| 7 | CPU failure |
| 3,6 | BIOS recovery image not found |
| 3,7 | BIOS recovery image found but invalid |
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