3
5) If not yet, change the video driver board part.
12. 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.
13. Beeper function failure
1) Check whether the beeper has turn off in the setup option.
2) Change the beeper.
3) If the trouble is not solved yet, change the mainboard part.
14. Key function failure
1) Check whether the key in the front panel is available.
2) Check the connection between the front panel and the mainboard. If necessary,
change the FFC connector.
3) If the key in the front panel is void, change the front panel part.
15. Remote controller function failure
1) Check whether the key in the front panel is valid.
2) If the key in the front panel is valid,that is to say the mainboard works normally.
Check whether the battery of the remote controller is available or change
another one good.
3) If the key in the front panel is viod, you should check the connection between the
front panel and the mainboard. If necessary, change the FFC conector.
4) If the trouble is still not solved yet, change the front panel.
5) If the trouble is still not solved yet, change the mainboard part.
16. No display in the LCD
1) Make sure the TFT unit is colsed.
2) If there is no display in the LCD also, you should change the LCD board.
17. Display in the LCD is abnormal
1) Check the connection between the mainboard and keypad .
2) If the display of LCD is abnormal, you should change the LCD board.
18. No volume display in the TFT
1) Check whether the volume knob is available.
2) Check whether there is volume display in the TFT using the remoter controller to
adjust the volume.
3) If there is volume display in the TFT using the remoter controller to adjust the
volume, that is to say the display part and the mainboard part work normally, you
should change the front panel part.
