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Battery Charging
Charge the battery while the system is off for faster charge times. You may notice longer charge times when the system is
turned on and running graphics-intensive applications.
No POST
If the system does not perform a Power-On Self-Test (POST), there are various things to look for:
1. Check that the system has a power light.
2. If the system has no power light, ensure it is plugged into AC power. Remove the battery.
3. If the system has power but is not performing a POST, check if the keyboard status lights flash to indicate a
successful POST, but no video, or if the keyboard status lights are lit in a sequence indicating a system problem.
4. With the power off and the system unplugged, remove all CRUs from the system and reconnect the AC adapter to
the system and try again.
5. Run the On Board Diagnostics (OBD).
Video
If the LCD on the system shows no display or has other problems, here are some basic steps to take:
1. If the LCD is not displaying video or the video is garbled, run the BIST utility.
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 software or video card
problem.
4. If the LCD has extremely 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 as well as system setup to determine if the lines
are present in all modes of operation. Run the BIST utility.
6. If the LCD has color problems, run the BIST utility.
7. If the LCD has burned-out pixels, verify the LCD is still within LCD standard guidelines.
8. Run the OBD.
BIOS
If you have problems while using the computer, the issues may be related to BIOS settings configured incorrectly in
System Setup. Check the System Setup pages to verify the settings on each page. Try resetting BIOS to default settings
by pressing <Alt><F>.
Touch Pad and Keyboard
1. Attach an external mouse or keyboard to check for peripheral functionality.
2. Run the OBD.
Modem
For modem problems, ensure the driver is installed and working properly. Also, ensure the phone line works. Perform an
ATZ command in HyperTerminal™ to determine if the modem is responding.
Also, run Modem Helper.
General Troubleshooting
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Latitude™ D620
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22/02/2010
https://dcse.dell.com/SelfStudy/Foundations_2007/Foundations_2007_Portables/Portable
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