Owners Manual

Tablet LED

This section details the diagnostic features of the battery LED in a tablet.

Diagnostic LED

Tablets rely on the Battery LED light blinking amber/white pattern to determine failures listed in the following table:

NOTE:

• The blinking patterns will consist of 2 sets of numbers being represented by (First Group: Amber blinks, Second Group: White

blinks)

• First Group: The LED blinks 1 to 9 times followed by a brief pause with LED o at the interval of 1.5 seconds. (This is in Amber

color)

• Second Group: The LED blinks 1 to 9 times, followed by a longer pause before the next cycle starts again at the interval of 1.5

seconds. (This is in White color)

• Example: No Memory detected (2,3), Battery LED blinks two times of amber color followed by a pause, and then blinks three times

of white color. The Battery LED will pause for 3 seconds before the next cycle repeat itself again

The following table depicts the amber and white blinking patterns with possible troubleshooting resolution:

Table 2. LED pattern

Blinking pattern Problem Description Suggested Resolution

2,1 processor processor failure

2,2 system board, BIOS ROM system board, covers BIOS corruption or ROM error

2,3 memory no memory/no RAM detected

2,4 memory memory failure/RAM failure

2,5 memory invalid memory installed

2,6 system board; chipset system board/ chipset error

2,7 display display failure

3,1 RTC power failure coin-cell battery failure

3,2 PCI/Video PCI/Video card/chip failure

3,3 BIOS recovery 1 recovery image not found

3,4 BIOS recovery 2 recovery image found but invalid

Real Time Clock reset

The Real Time Clock (RTC) reset function allows you or the service technician to recover the recently launched model Dell Latitude and

Precision systems from select No POST/No Boot/No Power situations. You can initiate the RTC reset on the system from a power o

state only if it is connected to AC power. Press and hold the power button for 25 seconds. The system RTC reset occurs after you release

the power button.

NOTE

: If AC power is disconnected from the system during the process or the power button is held longer than 40 seconds, the

RTC reset process is aborted.

The RTC reset will reset the BIOS to Defaults, un-provision Intel vPro and reset the system date and time. The following items are

unaected by the RTC reset:

Troubleshooting