Question about Motherboards
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?
Ya u can try to chnag ethose how much is the mobo on ebay for one of these also new mobo may be your best bet even fixing them still may not work for u thats 50 50 chance
Posted on Jan 22, 2008
I have similar problem with my 540/640. Doesn't start up, led doesn't indicate it's being charged.
One obvious fault I've found is the integrateg circuit next to the power supply socket on the motherboard- it's broken in half and burned through.
Could somebody tell me what is written on it, so I could find replacement.
It sais P2(?)5AZ and something else.
If you could look into it I would be greatful
Posted on Feb 09, 2010
My Laptop charger blinks whenever i plug it witout battery. Is it possible to on Laptop withut battery. How much is the battery for the model No. PP01L C540/C640
Posted on Sep 23, 2008
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