I have a Sharp color tv that's only a couple of years old. Last night I turned it off by pushing the power button on the front of the tv. The tv appeared to turn off, but there was a small circle of colors in the center that was left there. There was movement in the circle, so looking closer, I thought that I was actually seeing a round, blurry tv show in miniature that looked like I was looking at it through a "fish eye" lens. I pushed the power button again and the tv came back on like normal. I pushed the power button again and the weird colors and circle of light was still there, but not as "clear" as it was the first time... now it mostly looked like moving colors with no appearance of an actual show. I turned off the tv again using the timer and it did not seem to have the colors then.
Tonight, as the tv was turned off, the circle of colors/lights are there in the center of the screen again and seem to be staying there.
Any ideas why this is happening?
SOURCE: Horizontal green line appears on screen
my maxent plasma tv has the same problem but it has green and red lines. I found out that hitting the tv from the back works. It used to last a long time but now i have to get up now and then to slap the tv on back with my hands! anyone with a long term solution?
SOURCE: Sharp LCD TV, Screen goes black sound stays on
Capacitors on the power pack are going bad they need to be replaced that should fix the problem.
SOURCE: i have a sharp-aquos flat screen tv
Power supply board it dead.Replaced the power supply board should solved this problems.Tries Shopjimmy.com,Ebay.com to buy a refurbish power supply board. .
SOURCE: We have a sharp lcd tv. it is 2.5 years old. The
the lcd tv hhave somethig like a bulb and after a period of use that bulb must be changed. take the tv on service. the service man wil see what is the problem most accurate.
SOURCE: Sharp Aquos LC-42DH77E 42" LCD TV TV appears to
The PNL-POW (LCD panel Power) and the PS-ON will be 0V until the main board send out the signal to turn them on, it is working.
Do you get backlights?
Did you check the fuses on the Inverter board? You power supply is working.
This service manual may match your chassis:
http://elektrotanya.com/?q=showresult&megnev=Sharp&megnev2=LC-42DH77E&kategoria=&kat2=all
Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
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