20
Model No: 21HAP1BE
Version 1.0
6. No OSD (On Screen Display)
This failure is usually cause by the circuit of character generated and located. Most of reasons are that the horizontal and vertical flyback pulse signals do not come to UOC.
We can judge this failure by measuring the wave of the character in an oscilloscope.
The detail checking and repairing steps are as follow:
YES
NO
Check FBT T451
No OSD
Check the wave on the pin 7 of FBT
Check C482, R485, VD483, R487, N301
