Dell Inspiron 3480, Service Manual

Page: 136 / 138

Hard-drive activity light
Turns on when the computer reads from or writes to the hard drive.
NOTE: Hard-drive activity light is supported only on computers shipped with hard drive.
Power and battery-status light
Indicates the power and battery-charge status
Solid white — Power adapter is connected and the battery has more than 5 percent charge.
Amber — Computer is running on battery and the battery has less than 5 percent charge.
Off
• Power adapter is connected and the battery is fully charged.
• Computer is running on battery and the battery has more than 5 percent charge.
• Computer is in sleep state, hibernation, or turned off
NOTE: Hard-drive activity light is supported only on computers shipped with hard drive.
The power and battery-status light blinks amber along with beep codes indicating failures.
For example, the power and battery-status light blinks amber two times followed by a pause, and then blinks white three times followed by
a pause. This 2,3 pattern continues until the computer is turned off indicating no memory or RAM is detected.
The following table shows different light patterns and describes what they indicate.
Table 14. Diagnostics
Light pattern Problem description
2,1 CPU failure
2,2 System board: BIOS and ROM failure
2,3 No memory or RAM detected
2,4 Memory or RAM failure
2,5 Invalid memory installed
2,6 System board or chipset error
2,7 LCD failure
3,1 CMOS battery failure
3,2 PCI or video card or chip failure
3,3 Recovery image not found
3,4 Recovery image found but invalid
3,5 Power rail failure
3,6 SBIOS flash corruption
3,7 Timeout waiting on ME to reply to HECI message
Camera status light: Indicates whether the camera is in use.
• Solid white — Camera is in use.
• Off — Camera is not in use.
136 Troubleshooting