NEC Mobile Pro 900 Users Guide

A 
Troubleshooting 
! Solving Problems 
! Replacing the Backup Battery  

 
A-2 Troubleshooting 
Solving Problems 
Your NEC MobilePro is designed to provide many hours of service 
while you are at home or on the road. 
For optimum performance, frequently back up and synchronize the 
MobilePro data with your host PC. Then if something happens, most of 
your data is still available. If you have problems, check the information 
in the following table for possible solutions. 
Troubleshooting 
Problem Resolution 
The MobilePro has no 
power. Check that you installed the backup...

 
Troubleshooting A-3 
Troubleshooting 
Problem Resolution 
A low battery message 
appears. Recharge the main battery (see 
“Connecting the AC Adapter” in 
Chapter 1). 
When using a PC Card, 
such as a modem, the 
unit powers off. Connect the AC adapter to the unit when 
using PC cards that require large 
amounts of energy. 
The AC adapter doesn’t 
work. Make sure that the main battery is 
installed (see “Installing the Main 
Battery” in Chapter 1). 
Check that the AC adapter connections 
are secure....

 
A-4 Troubleshooting 
Troubleshooting 
Problem Resolution 
The serial port doesnt 
work. Check that the cable connections are 
secure. 
Verify that the MobilePro PC Connection 
setting is set correctly (see “Connecting 
to Your PC via Serial Cable” in  
Chapter 1). 
Check the availability of the serial port 
(see “Ensuring the Availability of the 
Serial Port” in Chapter 1). 
The IrDA port doesnt 
work. Check that nothing obstructs the path 
between the transmitting and receiving 
IR ports. 
Check the...

 
Troubleshooting A-5 
Troubleshooting 
Problem Resolution 
The reset button does 
not respond. Use the MobilePro 900 stylus to reset the 
unit (see “Resetting the MobilePro” in 
Chapter 4). 
Remove the main battery. Reinstall the 
battery and make sure it is seated 
properly.  
Try resetting the unit again. 
Be sure to make regular backups. 
 
Note   For further assistance, call NEC Solutions America Support 
Services at 1-800-632-4525. See “Help Resources” in Chapter 1 for a list 
of available services...

 
A-6 Troubleshooting 
Replacing the Backup Battery 
The MobilePro uses a CR2032 lithium coin-cell battery to maintain 
system configuration information. If the battery fails to maintain 
system configuration information, replace it with an identically rated 
battery from the same manufacturer. 
The battery can explode if you use a battery 
that is not the same type battery (or an equivalent type) that ships with 
the MobilePro. Use only the same type battery or an equivalent type 
when replacing the...

 
Troubleshooting A-7 
4. Using the tip of the MobilePro 900 stylus, remove the used battery 
(see the following figure). 
To prevent damage to the MobilePro, use the 
tip of the stylus to remove the battery. Using other tools can damage 
system components. 
Removing the backup battery 
A – Pry Point of Stylus 
  

 
A-8 Troubleshooting 
5. With the positive (+) side of the battery facing up, insert the new 
battery into the battery socket as shown in the following figure. 
Inserting the backup battery 
A – Backup Battery (+ side up) 
Checking the backup battery installation 
 
  

 
Troubleshooting A-9 
6. Replace the backup battery cover. Tighten the screw to secure the 
cover. 
Replacing the backup battery cover 
A – Screw  B – Backup Battery Cover 
 
The battery can explode if you use a battery 
that is not the same type battery (or an equivalent type) that ships with 
the MobilePro. Use only the same type battery or an equivalent type 
when replacing the battery. 
Do not recharge or disassemble battery.  
Do not dispose of battery by burning it. 
Lithium acts as a catalyst...