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 
battery and that it is installed correctly 
(see “Installing the Backup Battery” in 
Chapter 1). 
Check the main battery (see “Installing 
the Main Battery” in Chapter 1). 
If you are using an AC adapter, make 
sure the connections are correct and 
secure (see “Connecting the AC 
Adapter” in Chapter 1). 
Nothing appears on the 
screen. Try pressing the Power button again (the 
unit might have turned itself off if it was 
not used for a specified time). 
Adjust the display panel brightness (see 
“Making Display Panel Adjustments” in 
Chapter 4). 
Check the backlight settings (see 
“Configuring the Backlight” in Chapter 4). 
Check the power connections. 
Try recharging the main battery (see 
“Installing the Main Battery” and 
“Connecting the AC Adapter” in 
Chapter 1).  
						

							 
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. 
Verify that the AC outlet being used is 
working. Do this by plugging in another 
electric device, such as a lamp. 
Check that the battery lock is in the 
locked position (see “Installing the Main 
Battery” in Chapter 1). 
The keyboard doesn’t 
respond. Reset the unit (see “Resetting the 
MobilePro” in Chapter 4). 
If you have installed handwriting 
recognition software, be sure that you 
have not set the “disable keyboard” 
parameter in that software. 
The USB port doesn’t 
work. Check that you installed the USB driver 
from the Application and Driver CD (see 
“Loading USB Files” in Chapter 1). 
Verify that the MobilePro PC Connection 
setting is set to “USB Connection” (see 
“Connecting to Your PC via USB Cable” 
in Chapter 1). 
  
						

							 
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 information in “Connecting to 
Your PC via Infrared Port” in Chapter 1 
and “Using the IR Port,” in Chapter 4. 
The PC Card cannot be 
accessed. Make sure the card is inserted correctly 
and seated properly (see “Using PC 
Cards” in Chapter 4). 
Connect the unit to AC power using the 
adapter. Some cards do not operate 
properly unless the AC adapter is 
connected. 
The touch screen does 
not respond. Press Ctrl Alt = to calibrate the stylus 
input. Follow the on-screen instructions 
to complete the recalibration procedure. 
Reset the unit (see “Resetting the 
MobilePro” in Chapter 4). 
 
  
						

							 
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 from NEC Solutions America.  
						

							 
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 battery. 
Lithium acts as a catalyst when exposed to water and causes 
spontaneous combustion on contact. 
If you need to replace the battery, follow these steps. 
1. Save your data, turn off unit power, and close the display panel. 
Disconnect any cables attached to the unit, such as the PC Connect 
cable. 
2. Locate the backup battery cover on the bottom of the unit. 
3. Using a coin (for example, a quarter), loosen the backup battery 
screw and remove the cover. 
Locating the backup battery cover and screw 
A – Screw  B – Backup Battery Cover 
  
						

							 
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 when exposed to water and causes 
spontaneous combustion on contact. Discard used batteries according 
to the manufacturer’s instructions. Promptly dispose of used battery. 
Keep battery away from children. If battery is swallowed, see a doctor.