Acer Travelmate 240 can't start - dead SMD component!!!

havsys

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Jun 23, 2013
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Hello,

Can somebody help me to repair my Laptop.
I have Acer Travelmate 240. He can't turn on, it is dead. On motherboard I find damage SMD component.

SMD component mark is:
4425
SSAY∆ (SS letters represent a single character, perhaps it is a symbol, I don't know how to write that symbol)
W36A
- see picture!!!

Can somebody help me to IDENTIFY this component, and what means letters or marks on that this SMD component.

Is this : SI4425DY SOP-8 (8 pins) or
MOSFET AO4425

Can I use component 4425 with different letters or marks?

Thank you

Picture:

http://postimg.org/image/5v30ur8ah/

http://postimg.org/image/a8jhcrtmh/

http://postimg.org/image/5ldfb069l/
 

makkem

Distinguished
Hi
Thats an IC mosfet driver for power supply applications .
I suspect that the SS marks denote the manufacturer.
Generally speaking any 4425 designated IC should work.
However a word of caution,it can be a difficult procedure desoldering and resoldering SMD ICs without damaging it and other components with heat.
Also the damage that has happened to that component may not have been caused by that component but by another problem elsewhere in the circuit causing excessive current flow.
But I think 4425s are quite inexpensive so it may be worth a try.
 

havsys

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Jun 23, 2013
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makkah,
Thank you for you find the time to answer me.
As far as I understood you, I can use any 4425, even though the different labels.
For example I can use this one:
http://www.pchub.com/uph/item.html?img=Others-Brand-4425-Power-IC-4425-b-28395.jpg

So far, I've only got two answers, yours and from the second forum. On another forum I was told that I can use this one:
AO4425
38V P-Channel MOSFET
http://aosmd.com/pdfs/datasheet/AO4425.pdf

Do you agree with this?
 

makkem

Distinguished


Hi
yes this should work.
 

havsys

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Jun 23, 2013
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jarotech, thank you joined in the discussion.
I also tried to find a schematic for Travelmate 240 but I had no luck.
AO4425 MOSFET is compatible, I see, but if you can explain to me what exactly mean the label below the MOSFET 4425.(second and third row)
http://postimg.org/image/5v30ur8ah/
Friend 'makkem' suspect that the SS marks denote the manufacturer.
 

havsys

Honorable
Jun 23, 2013
4
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10,510
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Thank you jarotech,
This will be of great benefit for me :D

Now, only to find MOSFET AO4425 ;)

 
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