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Technical Information
B/8
PL24, PL28
This range of pins is not for jumpers, but is used to connect various
features around the system case to the motherboard.
PL24 Pins: 1 to 4 HDD active light
5 to 9 Keylock (not fitted)
10 & 11 System in ‘power standby’ light
12 & 13 System hardware reset (not fitted)
PL28 Pins: 1 & 2 System standby restore switch
3 to 7 Infrared controller
8,9,10 Fan, slow mode
11,12,13 Fan, full speed mode
14 to 17 Internal speaker
Replacing the CMOS battery
The battery has an average life of 3-5 years. If you have to
reconfigure the computer every time you turn it on, the battery has
discharged and needs to be replaced.
PL24
PL28
Pin1
Pin1