Question about Dell Latitude C640 Notebook

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My Dell Latitude C640 problem might need an electrician's opinion

I pinpointed the reason my Dell Latitude C640 would not power on all of a sudden, as well as turning off in the middle of things, to a loose connection on the adapter cord where there is a piece that seems to connect the two parts. (caused by my pulling the adapter probably). So even though the green light is on, but there is actually no connection. It turns on when I fiddle with the cord in thst area and I have been using my computer this way

I would appreciate knowing if this is a simple problem that I can correct without going to an electrician.

Thank you very much.

Layla

Posted by on

  • Layla Kaf Jun 04, 2009

    frankie, Geekman: Thank you both. I found an easier and possibly cheaper way: e-bay. Bought the adapter again and everything seems to be working perfectly. Now, I am buying ANOTHER adapter from a Hong Kong Outtfit, for three dollars, just as a reserve. It looks like these adapters are vulnerable especially at their junction to the computer. I hope I am posting this in the right place - :-)

    Thank you again

    Layla

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The connector can be replaced, an electronic repairer can do this for you.

Posted on May 08, 2009

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Hi,

i have 2 c640 motherboards ..with alomost the same..
one shuts down random , even after 20 seconds
the other is dead , dead dead
i think it's a resistant problem ,the u45 underneath the motherboard
if you type on the internet for :

c640 u45

you will find you are not the only one

there are technicians who can do the job..
but you have to take apart the whole laptop..

Posted on May 30, 2009

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Posted on Jan 02, 2017

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Hi

Both Dell Part numbers 18THT and 5W299 are 8X DVD-ROM Drive Modules. DPN 18THT is compatible with Latitude C series and DPN 5W299 is compatible with Latitude D series. The two drives have different and incompatible connectors.

Your Latitude C640 is a C Series Latitude. You can therefore not use DPN 5W299.

If you need a DVD drive module, get DPN 18THT or an alternative Latitude C series drive.

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Can I suggest a web site where I can purchase c640 dell laptops in bulk at good prices(not ebay please)?


your best bet is in the retail channel, where returns are a major issue. This time of year, is a good time. Otherwise, those parts go into secondary market, for S. America, etc.

Feb 25, 2008 | Dell Latitude C640 Notebook

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Dell Latitude C640 Laptop


get to the main board of ur system there is a jumper near the battery .
change its position while power is off and get it back to its previous position. this way u will reset cmos to default.
if the computer starts hit delete to enter setup and load system defaults.save changes then exit.
ps: defected processor could be the cause

Nov 14, 2007 | Dell Latitude C640 Notebook

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