1) Check whether the power supply is turned on.
2) Check whether the power socket of the fan is connected firmly.
3) Chang a good fan.
4) If the fan can not turn yet after the above operation, chang the mainboard.
7. The color of TFT is abnormal
1) Check whether the video output of rear zone is normal.
2) If the video output of rear zone is normal, that is to say the decode works normally,
and you should check the connection between the mainboard and the TFT unit.
3) If the video output of rear zone is abnormal, change the mainboard part.
4) If the color of TFT is abnormal yet after the above operation, change the video driver
board part.
8. White screen
1) Check the connection between the loader and the mainboard, the mainboard and the
power supply board of TFT, the power supply board of TFT and the TFT.
2) If the trouble is still not solved, change the power supply board of TFT.
3) If the trouble is still not solved after the above operation, change the Display part.
9. Black screen(No display in the TFT)
1) Check the connection between the loader and the mainboard, the mainboard and the
power supply board of TFT, the power supply board of TFT and the TFT.
2) Check whether the background lights are illumed. If not, change the CCFL board.
3) If there is no display in the TFT, change the display part.
4) If there is still no display in the TFT after the above operation, change the mainboard
part.
10. Blue screen
1) Check whether the video output of rear zone is normal.
2) Check whether the source can normally change. And have sound output.
3) If yes,check the reverse detect line.
4) If not, change the mainboard part.
5) If not yet, change the video driver board part.
11. The icon of MUTE displays in the TFT at all times
1) Check whether there is any audio output.
2) If the audio output is normal, change the mainboard part. If the trouble is still not
solved, change the display part.
3) If the audio output is abnormal, change the mainboard part. If the trouble is still not
solved, change the loader part.
