Dell Vostro 3591 Service Manual page 42

3. Remove the single (M2x4) screw that secures the I/O board to the palm rest and keyboard assembly [1].
4. Lift the I/O board, along with the cable, off the palm rest and keyboard assembly [2].
NOTE: When the IO board cable is disconnected from the system board, an RTC error occurs. This error occurs
whenever the RTC/coin-cell battery, IO board, or system board are removed.
In such instances, after the system is reassembled, it will undergo and RTC reset cycle and the computer turns on
and turn off several times.
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