Question about Sony VAIO VGN-FS640W Notebook

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Vaio Notebook FS640W has no power even while plugged-in

I was typing on my Vaio and all of a sudden it went dead. The adaptor still had a green light, but the notebook would not power up. No lights of any kind comes on. It is under warranty, but now Sony claims the part of the Notebook that connects to the power cord is bent or broken and thats the reason. That part is not covered under the warranty. Problem with that, the notebook hasn't been unplugged or moved from its location for over 2 months. How can this be the problem when nothing was wrong with it until a week ago? I explained this point and they claim this is the problem. Can someone please tell me if they had this problem and what solved it before I pay for them to fix something that they themselves broke?

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Re: Vaio Notebook FS640W has no power even while...

Thank you Tom. Not only did I call back but I also sent a complaint to the office of the Attorney General for consumer affairs. They sent Sony Corporate a letter and immediately, Sony contacted me and stated they will fix the laptop free of charge. I just wanted them to honor the warranty they advertised. Not give me excuses why they won't!

Posted on Mar 20, 2007

Re: Vaio Notebook FS640W has no power even while...

If the laptop just shut off and wont turn back on at all. Try disassembling the laptop and reset the battery on the motherboard.

Posted on Mar 20, 2007

Re: Vaio Notebook FS640W has no power even while...

I had the same problem with my joybook 8100 the bloody pin is all flimsy and the light to say the pc is charging keeps flashing on and off

Posted on Mar 13, 2007

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Re: Vaio Notebook FS640W has no power even while...

I would call back again and try another tech, sounds like you got a real incompetent stinker. I seriously doubt that Sony won't cover this unless there was abuse. Typically that can't be diagnosed over the phone unless there is physical evidence, i.e. you can see the bent pin. Call back, be polite but get the techs name or ID and explain your problem. If the AC transformer LED is on that would imply its working and the fault I suspect is the power distribution or battery charging circuitry in the laptop. As I said unless you can see a bent pin they have no way of knowing where the fault is and MOST techs would bring the laptop in for repair with the understanding that abuse isn't covered. If they still have the same response be polite and ask for their supervisor, don't accept that kind of non-service. Let us know what happens.

Posted on Dec 22, 2006

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Re: Vaio Notebook FS640W has no power even while...

I had the same problem with my Sony Z505 and my wife's Fujitsu S6210. Neither company would fix them for less than $ 250 plus postage to and from. I finally fixed them myself. Not somthing I would recommend to everybody. The Sony wasn't bad but the Fujitsu took me two days cause I had a hard time getting everything connected correctly when I reassembled it. The parts cost a measly $5 and from the design I can see why they fail. Fragile and poorly designed.

I found this video about a product that stops the problem...I ordered two, once for each of our systems. . .I haven't had any problems since I installed the Cable Retention Device.


Posted on Mar 04, 2008

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1 Answer

Sony Vaio vgn-fs640w does not power up nor does it

I went to the Sony Vaio support site for your model specifically and they mention a battery recall. There is a place on the site requiring specific information about your system and your battery to see if you are eligible for the recall. I would try this route to see if it resolves your issue. If not, I would say it is a blown transistor and you need to replace the motherboard. This means buying a new system, as Sony VAIO laptops are very proprietary and hard to find parts for.

Good Luck,


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To test if your dc jack is bad... Remove the Battery, Plug the Power cord into laptop then attempt to power on... If no lights turn on, no fan spins.. your DC jack is bad...
DC Jacks Cost $6 to $10 but you need to find someone experienced to replace it, or you might end up with a dead motherboard as well..

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