Hardware Troubleshooting - Samsung NT-Q70 Series Service Manual

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4. Troubleshooting

5) Hardware Troubleshooting

For the procedures to disassemble each part, refer to the descriptions of Chapter 4, "Disassembly and
Reassembly".
◆ LCD Related Troubles
1. The screen is dark or the colors of the screen are distorted.
→ Check the connection status between the LCD module and the LCD cable, between the LCD
cable and the main board LCD connector and between the LCD cable and the LCD inverter.
→ Replace the LCD cable or LCD inverter.
→ Check if there is a part of the LCD that is bent or broken due to impact.
2. No picture appears on the screen.
→ Check the connection status between the LCD module and the LCD cable, between the LCD
cable and the main board LCD connector and between the LCD cable and the LCD inverter.
→ Replace the LCD cable or LCD inverter.
→ Check if the System LED of the main board is blinking. (Check if it is operating or not)
→ Check if the memory module is out of order.
→ Check if the Power button can be normally pressed.
3. The LCD brightness is not adjusted.
→ Check if the LCD inverter is out of order.
→ Check the BIOS version and check if the standard adapter is used.
→ Replace the LCD cable or LCD inverter and check if it is out of order.
4. The LCD blinks while the system is in operation.
→ Check if there is a magnetic body near the touch pad button or the system or check if there is
an exterior defect to the LCD or system.
→ Replace the LCD cable or LCD inverter and check if it is out of order.
→ Check if a standard adapter is being used (19V/3.16A/60W).
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