Question about Dell Latitude D800 Notebook

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Dell Latitude D800 PC - Fan-2-CPU problem

I've had this hyper-expensive Dell D800 for 2.5 years.  Within the first few months, I started having mouse trouble.  For no reason, the mouse pointer would just fly off to a random corner of the screen.  Since I was playing a lot of games back then, this made playing impossible.  I notified Dell and they had me mail the machine back to them.  I did, they returned it (or a replacement) and said it was fine...but it wasn't.  Next, they sent an on-sight guy to fix it (twice) and after replacing the whole keyboard area, he said it was fine.  Again, it wasn't and I got mad that I spent all that money for a machine that couldn't do anything.  So, I put it in the closet.  2 years later, I am using it again.  Now mostly for watching DVD's at the office.  The mouse problem is moot since I mostly use it to hit play and thats all.  Now, anywhere between 15 seconds and an hour, at random times, a fan in the top left hand area of the box kicks on 3X louder than the normal fan and all of the sudden, the CPU usage slams to 100% and the video gets so choppy you can't use it.  An instant reboot and the problem goes away...then, somewhere between 15 seconds to an hour later, it happens again.  It can't be a heat issue becuase it has happened before the pc reaches the desktop after being off over night and other times after the reboot, it can go another hour before the fan kicks in (can't cool off that much in a 30-second reboot).  I assume it is a short (what he said last time), but after 3 complete keyboard replacements, how likely can that be?

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Re: Dell Latitude D800 PC - Fan-2-CPU problem

There's a second fan beneath the keyboard, you need to pry open the top panel where the power buttons are, then remove 2 screws for the keyboard to come off. When I did this, I saw the second fan with dust blocking it. I used a vaccum cleaner and my D800 works perfect again. One reason why the top left corner fan runs at full speed is that it reacts to the other fan being disabled, kind of like an emergency detour for the heatsink.

Posted on Nov 22, 2009

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Re: Dell Latitude D800 PC - Fan-2-CPU problem

Well the mouse pointer just goto calibration in control panel its hard to miss and the freak out thing....sounds like a lemon processor or a bad heat sink

Posted on Oct 28, 2007

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1 Answer

I need to unlock a bois pass word for dell latitude D800

The best way to unloc a BIOS password is to reset by removing the CMOS battery and while the mains is removed press the power button a few times and leave for about 30 seconds. Refit the battery and power up. Password should be removed.

Apr 12, 2013 | Dell Latitude D800 Notebook

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Dell latitude d800 will freeze up after 2 -3 hrs . all drivers are up to date. fans work.also battery wont take a charge works with ac jack. battery shows one green dot. did a scan found no problems!!!!...

Driver order is VERY important on Dell portables, Notebook System Software, Chipset and Video drivers should be installed in that order, after that point, the rest can be done as you please.
If not already done, flash the BIOS to current version.
If you do all that and issue still occurs, answer is likely that the system is overheating. Try blowing out the intake and exhaust vents for the CPU cooling and ensure you are using the system on a hard flat surface
If issue still occurs, you might want to replace the CPU heatsink and fan

Sep 24, 2010 | Dell Latitude D800 Notebook

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Have a dell latitude d800. Battery died so replaced with new one, ran fine for a few months, now it won't run from battery. Battery shows full charge from itself and from bios, so it is charging and the...

update bios-if same issue occurs-check for another known good battery (maybe a friend may have one) try this battery and if same issue is occuring then its your if a kown good battery is fine on the system or one is not available then we have to beleive there is a issue with the battery...alot of dell system's in which the battery gets replaced whith in the first year..chances are you will always have this issue with the system....the board is running at a high speed which is eventually killing the battery

May 08, 2010 | Dell Latitude D800 Notebook

1 Answer

Cursor tend to go spastic when I touch the keyboard on my Dell


I had this problem and it was solved by turning off the touchpad in the bios,

Pressing the f10 ? or f2 ? during startup will get you into the bios

are you sure the mouse is ok ?


Dec 10, 2009 | Dell Latitude D800 Notebook

1 Answer

The top two mouse buttons don't work. nether does the buttom right and it runs very slow. Slower than my old Dell Latitude c840

To fix the mouse buttons, you will need to replace the palmrest assembly.

As for the speed, several things can effect the speed.
  1. Lack of Hard drive free space (10% of the drive is the minimum space for normal windows operation)
  2. Too small swap file
  3. Lack of MEMORY
  4. Overheating due to improper cooling (Fan not turning normally, heatsink has back contact etc)

Nov 13, 2009 | Dell Latitude D800 Notebook

2 Answers

The mouse on my dell keyboard has a mind of its own, can i fix or disable it

Go to
and download and install the driver for the touchpad. If that does not solve your problem then use a USB mouse and forget about having the touchpad.

Aug 27, 2009 | Dell Latitude D800 Notebook

1 Answer

Flashing lock light then nothing!

Your laptop need to be cleaned and need a maintenance. Specially on CPU fan and heatsink. Bring your laptop on service technician, for repair and maintenance.

Jul 27, 2009 | Dell Latitude D800 Notebook

2 Answers

Dell Latitude D800 fan runs all of the time. This is a fan at the upper left hand corner of the laptop and it runs at a very high speed. Reboots do not help.

It is made to do that so that when you are running programs or games your cpu & graphics do not cook. Make sure you keep the vents free on the side/back of laptop as a partially blocked vent will also cause the fan to revup. Hope this helps.

Apr 01, 2009 | Dell Latitude D800 Notebook

1 Answer

Bios password dell d800

Remove BIOS battery. Short BIOS jumper or leave the battery out for a long time(Over night,maybe) This should default the BIOS to having no pass word present.  If that doesn't work then evidently Dell has one within the BIOS . Just ask them.

Feb 17, 2009 | Dell Latitude D620 Notebook

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Cpu upgrade latitude d800

what do the Lock Lights indicate (Flashing , ON, ON perchance) it appears that the CPU is either not compatible or bad. Have you tried the original porcessor?

Jan 29, 2009 | Dell Latitude D800 Notebook

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