Question about Dell Latitude D620 Notebook

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Dell D620 Won't POST

I was using my Dell D620 until this afternoon, when I ran into what looks to be a serious problem. When I now attempt to power on the computer, The power light comes on, the three LED's (num lock, caps lock, scroll lock) flash on for a second or two and then go off, and nothing further happens.

I have been all over the Dell Knowledge base on their support web site, and have run through all of the end-user diagnotics that I could find. I found an article that describes how to generate LED diagnostic codes holding the key down for a second or so as I turn the computer on. When I do that, the LED's show the following: NumLoc constantly flashes green (and will do so for as long as I choose to leave the power on), while the CapsLoc and ScrollLoc are constant green (no flashing). I haven't been able to find an answer as to what this combination indicates, although I am tempted to say that it's video related. This Dell D620 has the Nvidea graphics chip.

I am looking for a definition of the diagnostic code described above, and some direction on how to fix the problem. Before you ask, you should know that the computer is out of warranty.

Thanks in advance for your assistance.

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  • Anonymous Jan 13, 2009

    Tried to upgrade the memory from 2GB to 4GB on a D620 ... now the machine just gives an on-flashing-flashing error code on the diagnostic LED. Reinstalling the old memory doesn't help. I hope I didn't fry the motherboard with a stray jolt of static electricity.

  • Anonymous Jan 17, 2009

    I have exactly the same problem

  • Anonymous Jan 27, 2009

    same problem here when upgrading ram. have another go at inserting the memory sticks. they will push into the slots another 1-2mm than when you first inserted them.

  • mjatl Mar 06, 2009

    The symptoms of my machine are the same as described. One morning, I opened up the computer to discover that the screen will not display anything. The computer will shut down immediately when power is pushed. Flash codes indicate that it has a CPU or processor failure (flashing on on). The results are the same with or without the CMOS battery installed. At one point, I tried different memory combinations and did get a flash code to indicate that memory was missing when it was not installed properly. I plan to try reading the HD in an external case next. There are many posts about an NVIDIA problem, though I haven't found details enough to know whether this might be related. This Dell D620 is almost exactly 2 yrs old.


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If two of the three leds are flashing (the one on the left stays solid and the two other blink) then this is a no memory error and its likely the memory is not seated properly.

Remove the memory from under the keyboard and try one DIMM at a time in the slot on the back of the computer. Once the PC is booting again reintroduce the DIMM under the keyboard. Like the previous poster indicated the memory needs to be well seated.

Worked for me...

Posted on May 30, 2009

  • asif Aug 31, 2013



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I upgraded ram on a D630 and when I powered the system back on, the caps lock light flashed 45 times and then died. Turns out I hadn't pushed hard enough seating the memory modules (aside, one is under the keyboard--to remove the keyboard, you have to pry off the hinge guard, the plastic strip across the top of the keyboard where the power and sound buttons and lock lights are. Do it carefully--a manual says use a plastic scribe--cuz you don't want to break the plastic). The modules should be pushed in far enough so that the tabs on the ends of the clips fit into the notch on the memory stick. I thought I'd pushed plenty hard--wrong!

Posted on May 02, 2009

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Rather than chase down a ghost, try resetting the system by removing your external power, and removing your battery. Leave it out for a while then reinsert it and add external power later. Boot up and enter system setup. While in setup choose to set "System Defaults" and then exit setup and restart. All should be okay after that.

If that doesn't do it, remove the internal battery connector for few minutes while external power and the battery is out. There are holes in the bottom that point to the keyboard screws, be careful to lift the keyboard easily. You'll see the internal battery near the back and a connector to the board. Remove that connector carefully and lightly. Once off, leave it off for awhile. Reconnect reset your keyboard into the tray add power and battery and reboot into the system setup screens to reset the date and time and other power options etc.

In most cases, the laptop just gets glitched and confused and these lights will flash for a meaningless reason. Resetting the bios as described above usually works. I repeat usually works

Unfortunately, if that doesn't do it, you'll need to phone Dell Support and suffer through that experience.

There are mini PCI cards in laptops and yours may be a graphics card but usually they're modems and network adapters. If you have a graphics card remove it and reinsert it. This works a lot of the time and may do it for you as your instincts may be correct.

In the long run, searching for a list of code descriptions for flashing lights is an endless easter egg hunt as they're reserved for Dell internal repair purposes.

Ultimately you may just want to replace the entire unit by shopping on Ebay and picking one up for around $600.

I know this isn't much help but I gotta tell you what experience has proven to most of us and ask you to try the above suggestions and if that fails consider that you may now own a dead laptop.. although I rather doubt it.


Posted on May 15, 2008

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I just spoke to Dell Support about this very issue. They told me that the processor is bad.

Posted on Dec 07, 2008

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My D620 has just started doing the same thing. The flash codes are very relevant and they do mean something. I suspect it's memory or video related as the LCD doesn't come on nor my external monitor. The CPU is functional (pressing the power and getting an immediate power off instead of waiting 5 seconds means the CPU is functional).

I do have the NVidia card which is on the list of cards that NVidia screwed up with and which are failing. See:

If you're issue is video related with the NVidia card, you should get another year of free warrenty.

I'll let you know what happens with mine as it should be under warrenty.

Posted on Sep 10, 2008

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I had a similar problem. I had a faulty memory chip.

Posted on Mar 20, 2011

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Hey, all i just got the same issue as described above. i've deinstalled every component and tried to minimize the system, but it still won't up, blank display, i've noticed the GPU and CPU chip is getting hotter while i turned on the power, dose that mean the BOTH are functioning well???

Posted on Aug 15, 2010

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SOURCE: Dell Vostro 1510 laptop.NUM lock

Go to dell site and check what LED flashing means.This points to the problem.good luck

Posted on Apr 13, 2011

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SOURCE: Holding down the Func key

If your laptop won't run the diagnostics ( Holding down the Func key while powering up ) then you need to try and isolate the problem. Something is preventing the laptop from performing POST ( power-on self diagnostics ). Try removing the hard disk drive, memory modules, external USB devices.

Posted on Sep 06, 2011

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