Mfujitsu siemens li 3710 no power

[Romulo]

Hi everyone i need help please i have this fujitsu siemens li 3710 no power when i checked up the board there is a burn power mosfet AO4916 but i dont have this one anybody can advise me a replacement for this i have a lot of scrapboard here but some i checked its p channel and 4916 is nchannel.please help me thanks in advance.I have attached the img

[Romulo]

Re: Mfujitsu siemens li 3710 no power

Anyone please help

[Romulo]

Re: Mfujitsu siemens li 3710 no power

Anyone please help

[Romulo]

Re: Mfujitsu siemens li 3710 no power

anyone please help advise for mosfet to be replace

[tibd]

Re: Mfujitsu siemens li 3710 no power

Hello,
you say the mosfet is AO4916 (30V Dual N-Channel MOSFET with Schottky Diode).
But according to schematics its AO4932 (30V Asymmetric Dual N-Channel MOSFET) and they are not the same in specs. The picture you posted is blurry, so if you provide a new pic with the part number clear then its easier to know the part number. Did you get the part number from schematics?? which?

[Romulo]

Re: Mfujitsu siemens li 3710 no power

thanks for the response i did not get the part number becuase due to burn half of the fets i only get the number its AO4916 and part number starts BD then cannot read next

[tibd]

Re: Mfujitsu siemens li 3710 no power

Your best chances then is with either AO4932 or AO4912, they are pin-pin compatible and available on ebay.

http://www.ebay.com/itm/10PCS-AO4912...IAAOSwl9BWIEsl

http://www.ebay.com/itm/10pcs-New-AO...UAAOSwcu5UT6P4


If you read on chip AO4916 then go for that

http://www.ebay.com/itm/3pcs-AO-49I6...wAAOSw3ydVk1DC

[fddizon]

Re: Mfujitsu siemens li 3710 no power

bro romulo,

remove FET then check the pads. in single channel, pins 1 2 and 3 - shorted, pin 4 separate pins 5 6 7 and 8 shorted.
if not like this then its dual channel

hope this helps

[fddizon]

Re: Mfujitsu siemens li 3710 no power

check this schematic bro

https://cdn.badcaps-static.com/pdfs/...38317a3147.pdf

[Romulo]

Re: Mfujitsu siemens li 3710 no power

Thanks bro fddizon thanks for the advise and schematic

[Romulo]

Re: Mfujitsu siemens li 3710 no power

Thanks for the response tibd

[tibd]

Re: Mfujitsu siemens li 3710 no power

check this schematic bro

https://cdn.badcaps-static.com/pdfs/...38317a3147.pdf

Hope you yourself checked the schematics before you wrote your answers, Its dual mosfet regardless if its asymmetric or symmetric.

[tibd]

Re: Mfujitsu siemens li 3710 no power

Thanks for the response tibd

Its a dual mosfet, you must place the new one with right orientation otherwise you fry something else, so be aware of the orientation and pin compatibility when replacing.

[Romulo]

Re: Mfujitsu siemens li 3710 no power

thanks for the help problem you are right tibd it is dual channel mosfet I follow advise of fddizon and follow your advise I change with AO4932 mosfet now laptop fired up. thank very much for the help

[tibd]

Re: Mfujitsu siemens li 3710 no power

You're welcome, glad that it worked for you.