HP Dv5 1002us Service Guide - Page 67
RTC battery, Remove the battery see
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RTC battery NOTE: Removing the RTC battery and leaving it uninstalled for 5 or more minutes causes all passwords and CMOS settings to be cleared. Description RTC battery Spare part number 491571-001 Before removing the RTC battery, follow these steps: 1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system. 2. Disconnect all external devices connected to the computer. 3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 52). 5. Remove the Mini Card module compartment cover (see TV tuner module on page 57). Remove the RTC battery: Remove the RTC battery from the socket on the system board. Reverse this procedure to install the RTC battery. Be sure that the RTC battery is installed with the "+" sign facing up. Component replacement procedures 59