Question about Dell Latitude C640 Notebook
Hello.. I recently received a Dell Latitude C540/640 PP01L Laptop whichwon't power on with a adapter nor a charged battery. Considered themotherboard as the culprit after a number of troubleshooting attempts..Upon disassembly & close inspection of the motherboard's powercircuit it seems the motherboard has been altered/tampered with.. onthe left of the processor socket there are 8 Fairchild (FDS) Mosfets..out of the 8 there are 4 FDS6694 30V DC Converter Powertrench Mosfetsthat are connected/soldered together via a resistor.. one resistorattached to 2 Mosfets (2 resistors used for 4) Don't really know whatpurpose this trick was used for, may be the company it went topreviously messed up just cause the customer who happens to be a closerelative won't pay them as much as they wanted? anyway, i did manage toremove the unwanted resistors & tried to see if the laptop workswithout, but it doesn't.. so im assuming i'm dealing with some shortedmosfets needing replacement? what else do i need to look for to getthis not so fortunate critter to live again?
Thanks :-) bought new charger for dell latitude c640..only blinks wont come up...took battery out..nothing..took cd drive out nothing....how to fix?
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.
Posted on Nov 16, 2008
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Posted on Jan 02, 2017
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