Be sure you've got an antenna connected. Find the right one at:
Like AntennaWeb org
If that's not the issue you may not have a digital tuner in that TV and need a converter box to let it see HDTV signals that are broadcast in your area.
SOURCE: LG CRT TV Problem
It sounds like your picture tube is either shorted at the blue gun or there is a blue drive problem. The blue driver transistor can short and cause the same problem. If it has little fine white lines as well, most likely it is the tube. Thanks for using fixya.
SOURCE: sharp 14" crt tv model598WJ
What is the problem with your Sharp TV? Provide more details please.
In Sound-Menu Low-tone-regel to MAX and
High-tone-regel to MIN. Press 'F' button on TV.
Then press VOL- on TV and REVEAL on RC in
some time. Select: red and green buttons.
Adjust: yellow and blue buttons. Store:
'STR'. Exit: 'N' on RC.
In Sound-Menu Low-tone-regel to MAX and
High-tone-regel to MIN. Press VOL- on TV
and RESET on RC in some time. Select: red
and green buttons. Adjust: yellow and blue
buttons. Store: 'STORE'. Exit: switch off.
ON: Press simultaneously 'OFF TIMER' on RC
and 'CH.UP' local.
OFF: Press simultaneously 'OFF TIMER' on RC
and 'VOL-' local.
Simultaneously press 'RECALL' on RC and
'VOL-' local. Exit: 'NORMAL' on RC.
After entering into this mode, be careful not to spoil the set. Mark all the initial values on a paper for refernce, and begin to chage the values. You may only have to chage the value of "SC".
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