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My Dell laptop Latitude D400 flashes a lock with a capital A in it, then shuts off when I power it on. What's wrong?

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Test your power suply unit PSU or replace it
then replace all the leads that attach to your hard drive including electrical extensions + IDE,SATA and the ones that attach from your motherboard to hard drive

Posted on Sep 12, 2010

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Posted on Jan 02, 2017

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D400 is not booting up from usb


Is your system set up to boot from USB? What is attached? A flash drive or an external cd/dvd drive? If a flash drive, was the software on it created to be bootable? Is this the first time you are trying to boot from USB? Please provide more details.

Mar 01, 2014 | Dell Latitude D400 Notebook

1 Answer

D400 laptop not power on,external power supply ok,19.5v ok on board,F1(fuse)ok


If you've tried a known good AC adapter, then you will be replacing the motherboard.

Sep 26, 2009 | Dell Latitude D400 Notebook

2 Answers

DELL Latitude D400 - what are the series of (blinking) icons?


sometimes this indicate a fault with memory or the system itsef.Before you begin you will have to remove the battery and the ac adapter.Remove the memory modules .Replace the battery and the ac adapter without the memory.Power it on if it comes on and beep several times then the memory is bad.If not remove the battery and the ac once again.Press and hold the power button for twenty seconds to clear the nonvol memory.Replace the memory the battery and the ac adapter.If still no go remove all the same items along with the hard drive and cd rom,Insert the battery and the ac adapter try again.If you hear a beep this time replace the battery(remember whenever you install to remove power).If nothing works and you none of the desired results you will have to replace the motherboard.
Good luck

Jul 16, 2009 | Dell LATITUDE D400 D500 D505 D600 D800...

1 Answer

Dell d400 flashes the light on pressing the power button and shows a nine in a padlock sighnthens shuts down without showing anything on the screen.


Take the battery out and press the power button for 30 sec and connect the power cord and reboot.
This should work fix it else the issue seem to be with motherboard.

Thanks
Kindly rate the answer
Smith

Jul 09, 2009 | Dell Latitude D400 Notebook

2 Answers

Sound driver


Select your model on website below to download drivers:


Dell Drivers and Downloads

Mar 04, 2009 | Dell LATITUDE D400 D500 D505 D600 D800...

1 Answer

Am trying to download the VGA drives for Dell D400 but i cannot get them.I feel it will solve my resolution problem for my Laptop.But am not sure if am right and am also failing to get them


You can get your VGA Driver for your Dell Latitude D400 here at this site:

http://support.dell.com/support/downloads/driverslist.aspx?c=us&l=en&s=gen&ServiceTag=&SystemID=LAT_PNT_PM_D400&os=WW1&osl=en&catid=&impid=

On the drivers and downloads for this criteria, Click the (+)Video and choose your desired VGA controller driver then download it. You may now successfully install your VGA driver.

Dec 24, 2008 | Dell Latitude D400 Notebook

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