Question about Dell Latitude C400 Notebook

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C 400 Latitude display problem

When I power on my C 400 Latitude note book, it does not show display. From top panel where ON button is fix, there are 3 LED indicators, LED 4 (Lock "A") blinks 10 or more times but note book does not display. after 15 sec it automatically power off.

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  • m_ih2002 Dec 02, 2008

    I disassmbled all hardware i.e HD,RAM,MODEM and keyboard panel one by one with chak for repair my C400, for 2 times my system showed display for a moment, when I again assembled all hardwares, and powed on, it again showed only caps lock blinking.

  • m_ih2002 Dec 03, 2008

    Thanks sir for a good assistance like nice instructor. there is only one module of ram. during assembling/disassembling system give 2 time display.....but later become off.


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That LOCK A sysmbol is the caps lock.

Most likely its due to hardware failure. Be sure the battery is holding a charge and the power adapter is working.

It could be bad Ram. Usually when there is nothing at all but a quick light on and off and nothing, its due to motherboard issues or hardware plugged into it. Try removing any CD drives or add in devices.

Good luck

Posted on Dec 01, 2008

  • Chris Busch
    Chris Busch Dec 02, 2008

    Hmm. well, how many Ram modules does it have? if it has two, try using one or the other and if one doesnt work and the other does, then it a bad ram module and replace that one.

    Im guessing the System board went out and unless you can get one for cheap, i would invest in a new laptop.

    I work with alot of the new dells and have had alot of them have bad mother boards.

    Have your tried powering it on without the battery in it and just AC power? If that works, then its the mobo battery connectors.

    If its none of these then im affraid it bad luck.


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