Question about JVC AV-27230 27" TV
It started with 4 to 5 black lines in lower end of the screen and eventually ended up with thin horizontal lines over entire screen
Posted by Anonymous on
SOURCE: Black Lines in picture
You may have a bad cable, bad connection, interference or all of the above. Try wiggling the cable and see if that helps. You could also move any other electronics away from the cable (if possible) and/or change out the cable (cable tv/antenna cable) and see if that clears it up. However, if the line does not appear to have any information in it as though it was just missing then your problem is a hardware issue that will require a trip to tv repair shop.
Posted on Sep 24, 2008
vertical problem need to check for bad solder joints on vertical ic would be helpfull if we had the model number o f yur set. also could be bad capasistors in vertical section.
Posted on Mar 09, 2009
It sounds that the main power supply section to your TV has the fault. The horizontal thik lines that appears crawling down across the screen should be of video 'HUM'. Have you replaced the main filter capacitor at the power supply section? If not, replace it along with the main rectifier. The AC power is rectifed by a bridge and applied ot this main filter capcitor. It will have a capacitance value between 120 to 350MFD 450VDC. Check this section. Measure the rectifed DC voltage acorss this main filter capacitor. It should be around 350VDC, if your home power supply line is 220VAC. If it is 110AC, this DC voltage will be around 165VDC; and it should be. If rectified DC voltage found lower than the input AC voltage, replace the rectifier bridge. In some sets, this bridge section have four diodes. Some other circuits, a bridge rectifier stalk may be used.
Posted on May 21, 2012
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