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Repair Guides for Sony Laptops

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Vaio PCG-4E1L (VGN-T350) CMOS Battery

Hello team! Would you please help me with my Sony Vaio PCG-4E1L (VGN-T350) CMOS Battery replacement. First, does anyone know what replacement part I need for the CMOS Battery?

hen I will need assistance in doing the break down. I have read some are located under the keyboard and other places I have read they are under the touchpad. So there is a lot of confusion.

But please help point out the correct battery first.

Thank you for all your help!

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Vincente Sanchez, the Sony part number for the RTC (CMOS) or (Backup Battery) is 1-756-424-11 Here is the dis-assembly guide for your laptop.

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Thank you very much! Now I am on the hunt for that part New (not used)


Thank you for accepting my answer, good luck.


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Vincente Sanchez will be eternally grateful.
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