Question about Computers & Internet
I have SONY VGN-B1VP laptop when press power on key only led of power & battery is on and PC not have any function please help me
Believe problem to be one of the Power MOSFET's, in the DC - DC circuit on the motherboard
Using the HP Pavilion dv6000 series and Pavilion dv9000 series, of Notebook PC's for an example,
The two Power MOSFET's used; are the Fairchild Semiconductor Industries -FDS6679 - Power MOSFET, and the Alpha & Omega Semiconductor LTD - AO4407 - Power MOSFET.
Showing availability and cost. Using just FDS6679 for an example,
Obsolete. Using cross reference match example,
One dollar and one penny USD.
AO4407 is obsolete too. Cross reference match example for it, cost is 78 cents USD.
NOT stating the P.MOSFET's are used on your Sony VAIO's motherboard. Showing what a Power MOSFET looks like for this type of application, and availability/cost.
Look on your motherboard in the DC - DC converter circuit area, where the DC Power Harness plugs in.
[The AC adapter (Charger), plugs into the DC Power Jack on the laptop. (DC_IN)
For your laptop the DC Power Jack is connected to wires, that end in a male plug connector. The male plug connector plugs into the motherboard.
It is now called a DC Power Harness ]
Let's take a brief look at a motherboard example,
(Sony VAIO PCG-6L1M and VAIO VGN-B1VP are supposed to be the same)
The Main view shows up automatically, with the Top view of the motherboard.
Scroll down for Bottom and Top view.
Again there is a Main view, and this time two smaller views to the Right.
Top small view is Top view of motherboard.
Bottom small view is Bottom view of motherboard.
Looking at Bottom view of motherboard, believe DC Power Harness plugs into the Right side.
Series of Power MOSFET's are on the right side, also.
WEAR an ESD wrist strap, and have it's alligator clip attached to a good ground source.
Here is free access to the Service Manual.
You want VGN-B
Bottom line -> VGN-A
Scroll across, click on VGN-B
(It's a PDF file)
Posted on May 01, 2013
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Posted on Jan 02, 2017
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