Question about LG Televison & Video
Checck if there is a capaccitor that has leaked in the SMPS power supply section. If the filter capacitor is weak this ripple of noise can come over.
Similarily the same noise can come from the secondary section , so check or replace suspected capaccitors.
finally check for any grounding issues of the chassis or the shield of the HT sections, thee input sections.
Tighten all grounding screws or PCB ground.
Any dead insects inside can also cause a bridge in circuit and bring in these noise bars.
Posted on Sep 03, 2010
If the bar is there whatever the source of the image (tv, cable dvd player, all) then the fault is in the image processor located on the mainboard - it's buffer memory is defective and the data stored in one block is corrupted so it's displayed as static.
The mainboard to which the processor is soldered must be replaced. This is a job for someone that has at least basic experience of electronics. And you need to find a replacement board cheap enough to worth its replacement get a quote from the local LG repair shop, it might just not worth it.
Posted on Sep 02, 2010
Remove the back panel of the tv. You will see an IC (integrated chip) Check the solder joints on the chip. Make sure none are loose or are seperated from the contacts. If they are, put some new solder on them for a good connection.
If the solder joints are good, and there are no burn marks on the circuit board and no swollen parts, then try gently tapping on the on the chip. This sometimes gets it to react properly.
Posted on Sep 01, 2010
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Posted on Jan 02, 2017
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