Chapter 7: Troubleshooting - Dell Latitude 3390 Owner's Manual

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Table 10. Troubleshooting
Issue
Battery Charging
No POST
Video
BIOS
Touchpad and Keyboard
Suggested Troubleshooting Steps
The battery should be charged while the system is off for faster charge time. Users may notice
longer charge times when the system is turned on and running graphics-intensive applications.
CAUTION:
There is a danger of a new battery exploding if it is incorrectly installed.
Replace the battery only with the same or equivalent type recommended by the
manufacturer. Discard used batteries according to the manufacturer's instructions.
When a user starts the notebook, the first thing that the BIOS does is to perform the Power-On
Self-Test (POST). The POST is a built-in diagnostic program that checks the hardware to make
sure that everything is present and functioning properly, before the BIOS begins the actual boot.
If the system does not perform a Power-On Self-Test, there are various things that you can look
for:
1. Check that the system has a power light.
2. If the system has no power light, make sure that it is plugged into AC power.
3. Remove the battery. Make sure that the power is turned off and the system is unplugged.
4. Remove all CRUs from the system and reconnect the AC adapter to the system and try again.
5. Run the ePSA diagnostics.
If the LCD on the system does not show any display or has other problems, here are some basic
steps that you can perform:
1. If the LCD is not displaying video or the video is garbled, run the ePSA diagnostics.
2. If the LCD is not displaying any video, connect an external monitor to eliminate a no-POST
problem. A good image on the external monitor eliminates a video card problem or a POST
problem.
3. Connect an external monitor, when possible, for all LCD-related problems to help eliminate a
possible software or video card problem.
4. If the LCD has dim video, adjust the brightness or connect an AC adapter to eliminate a power
management conservation setting in the BIOS.
5. If the LCD has lines on the screen, check the system during POST and system setup, to
determine if the lines are present in all modes of operation. Run the ePSA diagnostics.
6. If the LCD has color problems, run the ePSA diagnostics.
7. If the LCD has burned-out pixels, verify that the LCD is still within LCD standard guidelines.
For Dell internal users only, click here.
If users have problems while using the notebook, the problems may be related to BIOS settings
configured incorrectly in BIOS/System Setup. Check the System Setup pages to verify the
settings on each page. Try resetting BIOS to default settings by pressing Alt+F.
To troubleshoot touchpad and keyboard-related problems, you can perform the following steps:
1. Attach an external mouse or keyboard to check for peripheral functionality.
2. Run the ePSA diagnostics.
Troubleshooting
Troubleshooting
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