Question about Sony VAIO VGN-SZ480 Notebook

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Stamina/speed switch My stamina/speed switch stopped working recently. The green light indicator is on stamina mode,while the switch is set on the speed mode. I tried adjusting options in the Vaio Power Managment tool, but it did not switch to speed mode. I've been stuck with the stamina mode for a while, and i can't play some video games because stamina mode uses intel graphics, whilst the speed mode uses nvidia Geforce 7400 Go which is better. Would appreciate your help.

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  • mcowan Oct 20, 2008

    I have the same problem - are you just running Windows or do you have another OS installed? Reason I ask is because I have a tripple booting laptop and when this happened I had to put the switch to the light that was on, boot into Windows and login, change the switch and select Reboot on the popup.

    This only worked for me once. I am convinced that the switch itself is fine - Id like to rule out a software reason too (I doubt it very much also)

  • j_kumaruk Nov 20, 2008

    ihave the same problem

  • seiji Nov 29, 2008

    well my vaio sz1mb stuck on stamine mode, reinstalled xp it switched once to speed mode then stuck again after restarting into stamina mode .... no way to switch back anyway to do it by software or dunno somehow??

  • reodoc1 Jan 15, 2009

    I have the same problem. I have done nothing differently. It is just stuck in stam mode =(

  • bgorbet Jan 25, 2009

    I have the same problem. However, I am using a VGN-SZ330P notebook. I don't know what caused it but I can't play my games anymore and I get blue screen errors all the time when I try to watch videos online. I did a complete system restore and everything, nothing works. Is it my nvidia card? Do I need to get a new one before I can run in SPEED mode?

  • wda33 Feb 09, 2009

    I have the same problem. The only thing i can add is that my
    batteryjust went dead and will no longer accept a charge. Could the
    fact thatthe laptop is trying to charge said battery be a factor in not
    lettingthe system switch back to speed mode? I'm using
    a vgn-sz330p

  • andylan2009 Mar 31, 2009

    I set mine to stam mode (SZ330P) for school and it never went back. Somehow my graphics card has uninstalled itself so im running on the intel chipset card... I've reformatted, downloaded drivers, and messed around in the bios but still nothing :( any help would be much appreciated :D


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This IS very likely a hardware problem. I'm not very sure about your model but I know that many SZ users w/ G84xx/G86xx NVIDIA card out there are having similar problem -- could be due to NVIDIA chip failure.

Sony had just acknowledged this problem (failed G84/G86 NVIDIA chips) recently but unfortunately SZ series models were not included in the list.

In case you're using SZ model and are having G84/G86 nvidia card, just give sony service center a call, at least to let them take your issue into their record.

Posted on Aug 19, 2009

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