One. No power (Power LED not lit)

1. Check the external adapter is properly connected with the laptop, an external adapter is working properly.
2. If the only battery-powered, check the battery model whether wife battery; the battery is fully charged; the batteries are installed correctly.
3. Check the DC board is normal;
4. Inspection, repair motherboard

Two. Power indicator light, but the system does not run, LCD no display
1. Pressing the power switch and four seconds to turn off the power, then restart Check if normal.
2. External CRT monitor is displayed properly.
3. Check the memory and fits securely.
4. Clear CMOS information.
5. Try replacing the memory, CPU, charger board.
6. Servicing the Motherboard

Three. Displayed pictures are not clear
1. Adjust the display brightness after test are normal.
2. Check the display driver installation is correct; resolution is suitable for today's LCD size and type.
3. Check the LCD connection is properly connected to the board; Check the LCD connection with the LCD is connected correctly.
4. Check the backlight control board is working properly.
5. Check the motherboard's Northbridge exists the phenomenon of cold welding and Weld.
6. Try to replace the motherboard.

Four. No display
1. By checking whether the system status indicator is dormant, if it is dormant, press the power key to wake up.
2. Check the connection of the external display is normal.
3. Check whether to join the power supply.
4. Check the LCD connection at both ends to connect properly.
5. Replacement backlight control board or LCD.
6. Replace the motherboard.

V. Battery in Win98 / Win Me does not properly identify
1. Make sure the power management features in the operating system starts and is set correctly.
2. Charge the battery three hours before use.
3. In Windows 98 or Windows Me will be twice the battery charge and discharge.
4. Replace the batteries.

Six. Touchpad does not work
1. Check for external access and use the mouse MOUSE test program detects whether it is normal.
2. Check the touch pad connection is connected properly.
3. Replace touch pad
4. Check the keyboard controller chip exists the phenomenon of cold welding and Weld
5. Replacing the motherboard

VII. Serial device does not work
1. Check the serial port in the BIOS setup is set to "ENABLED"
2. Testing procedures with SIO test is normal.
3. Check the serial device is connected properly.
4. If a serial mouse, check the BIOS setting off internal touchpad; on Windows 98 or Me, check Device Manager to identify the serial mouse; check the serial mouse driver installed correctly.
5. Replacement of serial devices.
6. Check the motherboard Southbridge chip on the existence of the phenomenon of cold welding and Weld.
7. Replace the motherboard.

Eight. Parallel port device does not work
1. Check the parallel port in the BIOS setup is set to "ENABLED".
2. The PIO test program detects whether it is normal.
3. Check all connections are correct.
4. Check whether the external device is turned on.
5. Check the printer mode settings are correct.
6. Check the motherboard Southbridge chip on the existence of the phenomenon of cold welding and Weld.
7. Replace the motherboard.

IX. USB port does not work
1. Check in the BIOS setup USB port is set to "ENABLED".
2. Re-plug the USB device, check the connection is normal.
3. Check the USB port driver and USB device drivers are correctly installed.
4. Replace the USB device or contact the USB device manufacturer for technical support. "ENABLED"
5. Replace the motherboard.

Ten. Sound card not working
1. Test program with the AUDIO test is normal.
2. Check the volume control is correct.
3. Check the sound source (CD, tape, etc.) are normal.
4. Check the sound card driver is installed.
5. Check the speaker and microphone connection is working properly.
6. Sound board replacement
7. Replace the motherboard.

XI. Fan problem
1. FAN detect with normal testing procedures, the fan is normal boot
2. FAN cable plugged in?
3. FAN is good?
4. M / B is part of the CONNECTER solder good?
5. Bad motherboard

XII. KB problem
1. Test to determine the test procedure by KB
2. The keyboard cable plugged in?
3 .. M / B is a part of the CONNECTER crooked needle or other adverse
4. Bad motherboard