Service Manual

Troubleshooting
Locate the Service Tag or Express Service Code of
your Dell computer
Your Dell computer is uniquely identified by a Service Tag or Express Service Code. To view relevant support resources for your
Dell computer, we recommend entering the Service Tag or Express Service Code at www.dell.com/support.
For more information on how to find the Service Tag for your computer, see Locate the Service Tag for your Dell Laptop.
System diagnostic lights
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% charge.
Amber—Computer is running on battery and the battery has less than 5% charge.
Off
● Power adapter is connected, and the battery is fully charged.
● Computer is running on battery, and the battery has more than 5% charge.
● Computer is in sleep state, hibernation, or turned off.
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 power and battery-status light patterns and associated problems.
Table 17. LED codes
Diagnostic light codes Problem description Recommended solutions
2,1 Processor failure Run the Intel CPU diagnostics tools. If problem
persists, replace the system board.
2,2 System board: BIOS or ROM (Read-Only
Memory) failure
Flash latest BIOS version. If problem persists, replace
the system board.
2,3 No memory or RAM (Random-Access
Memory) detected
Confirm that the memory module is installed properly.
If problem persists, replace the memory module.
2,4 Memory or RAM (Random-Access
Memory) failure
Reset and swap memory modules amongst the slots. If
problem persists, replace the memory module.
2,5 Invalid memory installed Reset and swap memory modules among the slots. If
problem persists, replace the memory module.
2,6 System-board or chipset error Flash latest BIOS version. If problem persists, replace
the system board.
2,7 Display failure Flash latest BIOS version. If problem persists, replace
the system board.
3,1 Coin-cell battery failure Reset the CMOS battery connection. If problem
persists, replace the RTC battery.
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