Chapter 2 describes how to determine which part in the computer causes malfunction. The items checked are:
1. Power
2. Display
3. Operation
4. Sound
5. Touch panel
6. Function
The Test Program operations are described in Chapter 3. Detailed replacement procedures are given in Chapter 4.
The following tools are necessary for implementing the Diagnostics procedures:
1. An USB cradle
2. An USB DATA interface cable (No necessary if you have an USB cradle already)
5. An AC adapter
6. A screwdriver
NOTE: Be sure to use the PH point size “0” screwdriver complying with the ISO/DIS 8764-1:1996.
8. Tweezers
Use the flowchart as a guide for determining the defective parts. Before going through the flowchart steps, check the following:
q Make sure all optional devices are removed from the computer.
q Check the items of Table 2-1. When none of them is applied, make sure the reported failure can be reproduced. If not, follow the steps of Troubleshooting Flowchart again to identify the defect correctly.
Table 2-1 Examples of failure symptoms (1/2)
No.
Item
Possibility
1
Though the power button is pressed, the power is not turned on.
Built-in Battery switch is switched OFF or the battery is exhausted.
If the unit is used in a dim location, the surrounding light is reflected on the panel. The unit may seem to be turned OFF while Front Light is turned OFF.
According to the Power Management settings, the unit is switched OFF automatically.
2
Battery is exhausted in a short period.
The battery life depends on the devices used in SD Card Slot, and frequency of use of the Front light. These functions consume a lot of power.
Operating with front light ON, or using high power consumption devices such as SD Card type Interface exhaust the battery in a short period.
3
Battery cannot be charged.
Using an AC adapter that is NOT supplied with the unit.
While charging the battery, to use the high power consumption device or operation with heavy loading could cause the rise of temperature inside the unit and the stop of charging. In this case, the LED indicator flashes Yellow to notify the user that the charging has been stopped. Or extreme low temperature will also stop charging.
Since the extreme high or low temperature shorten the battery life, the unit is designed to stop battery charging below 0℃ and above 35 to 40℃ to protect the battery pack.
Table 2-1 Examples of failure symptoms (2/2)
4
Cannot use SD/ Memory Card
The card is not being pre-formatted.
Incompatible with 5-Volt specification cards.
SD card has been switched to Write Protect mode.
The card is not inserted completely or connected loosely.
5
Black or White dot on the screen.
Considering the LCD panel’s characteristics, it is hard to find a panel without any bad dots. If the number of dots and the distance between them meet the specifications, it should be allowable.
6
Touch Screen or Program Buttons do not react.
The operation is wrong.
Screen is not properly aligned with the stylus calibration.
7
Front Light is dim, cannot turn ON, or shuts OFF automatically.
Check the Front Light settings in Power Management settings
8
Cannot playback music, No sound, or volume is low.
When battery remaining comes to an end, it is hard to play the music and the volume could become lower.
9
Cannot execute installed application programs
Incompatible software is used.
10
Slow response to operation.
The memory is insufficient. Check the amount of system memory.
11
Hang up
Software being used may be incompatible with the system.
Executing too many application programs simultaneously
The software that requires big amount of memory spaces has been installed or the system memory for operation is insufficient. The files being used may be fragmented.
12
System Memory is enough, but Insufficient memory is shown.
Note: Warm boot or cold boot...
vanthi