Dell Precision M4500 Service Manual

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Dell Precision M4500 Service Manual Manual pdf 14 page image

Back to Contents PageDiagnosticsDell Precision™ Mobile Workstation M4500 Service ManualDevice Status LightsBattery Status LightsBattery Charge and HealthKeyboard Status LightsLED Error CodesDevice Status LightsBattery Status LightsIf the computer is connected to an electrical outlet, the battery light operates as follows:l Alternately blinking amber light and blue light — An unauthenticated or unsupported, non-Dell AC adapter is attached to your laptop.l Alternately blinking amber light with steady blue light — Temporary battery failure with AC adapter present.l Constantly blinking amber light — Fatal battery failure with AC adapter present.l Light off — Battery in full charge mode with AC adapter present.l Blue light on — Battery in charge mode with AC adapter present.Battery Charge and HealthTo check the battery charge, press and release the status button on the battery charge gauge to illuminate the charge-level lights. Each light representsapproximately 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 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, thebattery is in good condition and more than 80 percent of its original charge capacity remains. Each light represents incremental degradation. If five lightsappear, less than 60 percent of the charge capacity remains, and you should consider replacing the battery.Keyboard Status LightsThe green lights located above the keyboard indicate the following:LED Error CodesThe following table shows the possible LED codes that may display in a no-POST situation.Turns on when you turn on the computer and blinks when the computer is in a power management mode.Turns on when the computer reads or writes data.Turns on steadily or blinks to indicate battery charge status.Turns on when wireless networking is enabled.Turns on when a card with Bluetooth® wireless technology is enabled. To turn off only the Bluetooth wirelesstechnology function, right-click the icon in the system tray and select Disable Bluetooth Radio.Turns on when the numeric keypad is enabled.Turns on when the Caps Lock function is enabled.Turns on when the Scroll Lock function is enabled.Appearance Description Next StepON-FLASH-FLASHNo SODIMMs are installed1. Install supported memory modules.2. If memory is already present, reseat the module(s) one attime in each slot.3. Try known good memory from another computer or replace thememory.4. Replace the system board.FLASH-ON-ONSystem board error1. Reseat the processor.2. Replace the system board.3. Replace the processor.