I got this problem with my VAIO VGN-N250FH, it doesn't seems to be energized, i'd removed the battery and also disconnected the Notebook but even with this methods the PC keeps without turning on, Now i'd deassemblied the PC to get only the motherboard but i don't have any diagram to check the possible parts that could need to be changed or repaired, where could i find this diagrams? Thanks!

Can you confirm you're headphones work? You are getting sound through the laptop speakers as well?

AT boot the screen doesn't come on? If it's hot, remove all media, CD's DVD's USB, etc, turn it off , unplug, remove battery, let it cool off and replace battery, plug in, reboot. Is there any change?

If memory serves me, the mass storage controller is part of the chipset software. Here is a link to the driver download for you laptop. Choose the OS, and then look under motherboard for the chipset driver. While you are there, you might even update all your hardware drivers.

http://esupport.sony.com/US/p/model-home.pl?mdl=VGNN220EW&template_id=1&region_id=1&tab=download#/downloadTab

Hope this helps

How do you know it is not a battery problem? It seems obvious that the charger is working as the message you get tells you it is getting power to the laptop. So it looks like the solution is to get a new battery, also indicated by the fact that you can't boot with the battery in.

*Take out the battery,
*Remove main supply,
*Hold power button down for 30 secs,
*Put only power supply in, do not put battery in
*Turn laptop on
*Put the battery in.

Hello,
Please open you vaio laptop from bellow instruction link.
http://www.insidemylaptop.com/how-take-apart-sony-vaio-vgn-sz-series-laptop/

Follow step 14
You can manege the idea about CMOS battery.

http://www.insidemylaptop.com/disassemble-sony-vaio-vgn-bx-series-laptop/

Follow step 11

But this is your actual model
http://www.insidemylaptop.com/?s=PCG-K33+PC+Notebook
Just remove the Cmos battery And wit 2 minutes again fit the battery .Your password will be soon reset.

Hope it will help you.

Please refer 123 page of this doc


http://www.docs.sony.com/release/VGNB100series.pdf

Please remove the Battery from the Battery bay and disconnect the AC Adaptor from the Notebook. Then, clean the metal contact in the Battery Bay and leave the Battery removed for half an hour. Next, connect the AC Adaptor to the Notebook and the power cable to a functional wall outlet and try to turn ON the Notebook. If the power LED on the Notebook doesn't glow then again disconnect the AC Adaptor and try removing and reinserting the RAM module. If the issue persists even after performing all the above steps then service will be required.

However, if the Notebook turns on after performing the above mentioned steps but the Battery is not detected then perform C: Drive Restore using the VAIO Recovery Center.

As per the specification published online, the Computer model VGN-N250E is preinstalled with the VAIO Recovery Center in the hidden partition of the Computer. You may use it to perform C: Drive Restore to restore the Computer to the original factory settings. Please make sure that the new Battery is installed in the Computer while performing the Complete System Restore.

Performing a C: Drive Recovery will erase all the data present in the C: Drive only and will reinstall the pre-installed Operating System, Applications and the original Drivers supplied with the Computer.

Please restart the Computer and keep on tapping the F10 key to access the VAIO Recovery Center. Next press the Enter key then select the "VAIO Recovery Center" option then follow the steps given in the link mentioned below to proceed with the C: Drive Restore.

http://www.kb.sony.com/selfservice/documentLink.do?externalId=C473668

In the link given above, please click on the sublink "Restore C: Drive" to view further information on performing the C: Drive Restore.

Performing all the steps successfully should resolve the issue.

It seems to be a hardware problem but you can try this.

Remove the battery from the laptop and remove it from the main power too. Then press and hold the Power button for 10 seconds to release any flea power. Then reinsert the battery and try to turn it on.

If this does not work, you may have to contact vendor for hardware.

Normally this should be specified on the service tag at the bottom of the laptop, if the service tag had been removed it may be difficult to identify the exact model.