XOCECO LC17H3S, Service Manual

8 

2.TV set: 

No picture and sound, but only 

hash. 

Check if the antenna cable is correctly connected, or if it has 

received the video signal correctly.     

Symptoms  

Possible cause 

Unable to switch the power on 

Check to see if the power plug has been inserted properly into 

the socket. 

No picture and sound 

Check to see if the power supply of liquid crystal TV has been 

switched on. (as can be indicated by the red LED at the front 

of the TV set) 

See if it’s receiving the signal that is transmitted    from other 

source than the station 

Check if it’s connected to the wrong terminal or if the input 

mode is correct. 

Check if the signal cable connection between video frequency 

source and the liquid crystal TV set is correct. 

Deterioration of color phase or color 

tone 

Check if all the picture setups have been corrected. 

Screen position or size is not proper 

Check is the screen position and size is correctly set up. 

Picture is twisted and deformed 

Check to see if the picture-frame ratio is properly set up. 

Picture color changed or colorless 

Check the “Component” or”RGB”settings of the    liquid crystal 

TV set and make proper adjustment according to the signal 

types.  

Picture too bright and there is 

distortion in the brightest area   

Check if the contrast setting is too high. 

Possibly the output quality of DVD broadcaster is set too high.

It maybe also due to improper terminal connection of the video 

frequency signal in a certain position of the system. 

Picture is whitish or too bright in the 

darkest area of the picture 

Check if the setting for the brightness is too high 

Possibly the brightness grade of DVD player(broadcaster)is 

set too high. 

No picture or signal produced from 

the displayer if “XXX in 

search”appears. 

Check if the cable is disconnected. 

Check if it’s connected to the proper terminal or if the input 

mode is correct. 

There appears an indication - 

“outside the receivable scope) 

Check if the TV set can receive input signal. The signal is not 

correctly identified and VGA format is beyond the specified 

scope. 

Remote control cannot work 

properly 

Check if the batteries are installed in the reverse order. 

Check if the battery is effective. 

Check the distance or angle from the monitor. 

Check if there is any obstruct between the remote control and 

the TV set. 

Check if the remote control signal- receiving window is 

exposed to strong fluorescence.