A Reference Guide to the Precision Mobile Diagnostic Indicators

(Figure 4.2 Precision M7710)

This indicates the Battery power management LEDs codes

(Figure 3.2 Status LEDs)

Icon	Description
	HDD activity light - Turns white when the laptop reads or writes data
	Battery indicator light - Turns on steadily or blinks to indicate battery charge status
	Wi-Fi light - Turns on when wireless networking is enabled

If the laptop is connected to an electrical outlet, the power/battery light operates as follows:

These models had a block of keyboard status LEDs on the front of the chassis that either lit up solid Green flashed Green or were Off. I've included a table below with what these indicated.

(Figure 2.2 Caps Lock LEDs)

Icon	Description
	Caps Lock light - Turns on when the Caps Lock is engaged
	Scroll Lock light - Turns on when the Scroll Lock is engaged
	Number Lock light - Turns on when the Number Lock is enabled

If the computer is connected to an electrical outlet, the battery light operates as follows:

• Alternately blinking amber light and blue light — An unauthenticated or unsupported, non-Dell AC adapter is attached to your laptop.
• Alternately blinking amber light with steady blue light — Temporary battery failure with AC adapter present.
• Constantly blinking amber light — Fatal battery failure with AC adapter present.
• Light off — Battery in full charge mode with AC adapter present.
• The blue light on — Battery in charge mode with AC adapter present.

To check the battery charge, press and release the status button on the battery charge gauge to illuminate the charge-level lights. Each light represents approximately 20 percent of the total battery charge. For example, if four lights are on, the battery has 80 percent of its charge remaining. If no lights appear, the battery has no charge.

To check the battery health using the charge gauge, press and hold the status button on the battery charge gauge for at least 3 seconds. If no lights appear, the battery is in good condition and more than 80 percent of its original charge capacity remains. Each light represents incremental degradation. If five lights appear, less than 60 percent of the charge capacity remains, and you should consider replacing the battery.

These models had a block of keyboard status LEDs on the front of the chassis that either lit up solid Green flashed Green or were Off. I've included a table below with what these indicated.

(Figure 1.2 Caps Lock LEDs)

Icon	Description
	Caps Lock light - Turns on when the Caps Lock is engaged
	Scroll Lock light - Turns on when the Scroll Lock is engaged
	Number Lock light - Turns on when the Number Lock is enabled

(Figure 1.3 Hinge-Up Status LEDs)

If the computer is connected to an electrical outlet, the battery light operates as follows:

• Solid green — The battery is charging.
• Flashing green — The battery is almost fully charged.

If the computer is running on a battery, the battery light operates as follows:

• Off — The battery is adequately charged (or the computer is turned off).
• Flashing orange — The battery charge is low.
• Solid orange — The battery charge is critically low.