![](http://pdfasset.owneriq.net/f/e4/fe48c056-027d-4545-9dcf-ac42ba7b7f18/fe48c056-027d-4545-9dcf-ac42ba7b7f18-bg29.png)
Wire
Voltage (V dc)
Red +2.5 to +3.2
Black
Ground
• If the voltage is correct, replace the system board.
• If the voltage is not correct, replace the backup battery.
• If the backup battery discharges quickly after replacement, replace the system board.
Chapter 3. General checkout 33