Question about Dell Latitude C640 Notebook

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Dell Latitude C640 Laptop

My Laptop (Dell Latitude C640) wont turn on at all, the power light is green and I can hear the fan but nothing happens! It also feels very hot, what can I do??

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Re: 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 changes then exit.
ps: defected processor could be the cause

Posted on Nov 14, 2007

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I just bought a Dell latitude model number PP01L. When i plug the power cord into the AC adapter the light on it turns on. but when i plug in the adapter part into the laptop the light turns off and the...

Try it with all devices disconnected from the laptop. Sometimes defective USB devices will cause this. Then try it with no battery. This will isolate the problem for you. If it still happens with no battery or other devices, then the problem is either in the adapter or the laptop. If you bought the laptop new, then contact Dell tech support for help. If not, try a local shop. They should be able to connect another adapter to check the problem.

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I think you are wasting a lot of effort, I know how you feel and sometimes you cannot win.
Junk it for parts.

I do volunteer work for Technical Aid For the Disabled (a charity organisation) and repair/refurbish laptops and computers for disabled people and I hate to see good computers go to waste.

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Latitude C640 is dead!!


I have the exact same issue. It's not the processor. If you have you power supply tested, you will probably find that it's not working anymore. The green light still comes on when plugged in, but it's not sending the "charge" to the notebook.

I have this issue with a couple of C640's. I've tested the machine by charging the battery in another (Pentium 3 Dell C600), then putting it back into the broken machine... woohoo it works.

Unfortunately I can't figure out why the power supply's keep on busting, I don't think that the power-supplies are faulty, or maybe they just get old, don't know, but the most obvious problem is probably something with the mainboard, which really sux.

Hope this helps,

Oct 09, 2007 | Dell Latitude C640 Notebook

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