Sony PCV-E205 User Guide - Page 201
Write down the current BIOS Setup options.
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74 VAIO Micro Tower User Guide Replacing the Lithium Battery After several years, when the lithium battery starts to weaken, the system settings stored in CMOS RAM, such as the date and time, may be wrong. When this occurs, you need to replace the lithium battery. To replace the lithium battery 1 To run the Setup utility, press F3, then press F1 to run the BIOS setup utility. 2 Write down the current BIOS Setup options. 3 Shut down your computer and turn off all peripheral devices, such as your printer, display, and speakers. Unplug your computer. 4 Remove the left-side and bottom panels, as described on pages 76 through 77, respectively. 5 Install the new battery with the plus (+) side up. There is.danger of explosion if you replace the battery incorrectly. You must replace the battery only with a CR2032 type lithium battery. Discard used batteries according to the instructions on•page 94.