Real-Time Clock Battery Removal And Replacement - HP 400 Series Servicing Manual

5.5.24 Real-Time Clock Battery Removal and Replacement (Model 400s)
To remove the real-time clock battery, refer to Figure 5-42 and follow these steps:
1. Remove the top and left side cover and the CPU board.
2. Hold the CPU board upside down with the end holding the battery at the bot-
3. Lift the tab holding the battery in place and the battery should drop out.
To replace the battery, lift the tab and insert the battery with its plus side (marked with
a "+") toward the tab.
tom.
WARNING: Lithium batteries may explode if mistreated. Do
Figure 5-42. Model 400s Real-Time Clock Battery Removal
not put lithium batteries in fires, try to recharge
or disassemble them.
Replace battery with only a Matsushita Electric
BR-2325, 3-volt, lithium battery (part number
1420-0314)! Use of any other battery may cause
fire or explosion.
FRU Removal and Replacement 5-59