Acer Aspire X1420G Acer Aspire X1400 and X1420 Desktop Series Service Guide - Page 77

Jumper Setting This section explains how to set the jumper for correct configuration of the main board. Jumpers with more than one pin are numbered. When setting a jumper, ensure that the jumper caps are placed on the correct pins. The following illustration shows the location of JBIOS1. The following table shows the settings of the 3-pin Clear CMOS (JBIOS1) jumper. Place the jumper cap on pins 1 and 2 to close or short the jumper. Place the jumper cap on pins 2 and 3 to open or clear the jumper. Jumper JBIOS1 Type 3-pin Description Clear CMOS Setting (default) 1-2: Close (default) 2-3: Open Before clearing the CMOS, make sure to turn off the system. Aspire AX1400 Service Guide 69