Samsung 22 inch lcd tv model no la22b450c8 problem after some time white display
Follow this step
- In this case first i will check panel voltage are coming are not .if panel voltage is not come then also white display are coming
- If panel voltage ok then next step to check vgh ,vgl ,avdd,v com,etc . this voltage are not present then also white display is come . in this case this all voltage is coming but after some time it goes down
- If all voltage are coming and goes down then check sorting on source PCB .In this case i will check but no any sorting is found on source PCB .
- Then next step to replace dc to dc ic . in this source PCB two five lag is is present which is responsible vgh ,vgl ,avdd,v com
- Then i replace this two ic after replace my set is runing fine
- Image of this ic shown n fig.
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