Question about ViewSonic N2230w 22 in. LCD TV
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Posted on Jan 02, 2017
I have same problem (power light is on, and I have sound, but no picture ) and found that a small capacitor on back of power supply is blown. Seems to be common problem. But viewsonic doesnt stock. Part number is b-00005352 and im trying to find one too
Posted on Sep 10, 2008
My guess is that you might have the yellow (video) cable plugged into an audio input on the TV. Make sure that the yellow cable is plugged into both the video out on the DVD player and the video in on the TV. Most of these connections are color coded.
As a diagnosis, try changing the TV input (using the remote) and let me know if you still get the buzzing on the other inputs. If no, then, it's most likely your RCA connections. If yes, it's another problem.
Posted on Apr 21, 2009
If an LCD TV has sound but no picture do the following:
Use the source button to ensure that source is not set to the wrong input.
Try unplugging power cord for ten minutes, to ensure it is not a setting problem.
Check all the video cables at the back of TV.
Check Light /Color settings.
If problem persist and does not depend on external receiver or settings, then it is likely an internal fault.
If it has sound but no picture then one of the following parts is faulty, and must be tested and replaced:
Theinverter is the high voltage board that provides variable power to thebacklight lamp. This is the most common. When inverter is faulty youcan get no picture, or a very dim picture that can only be seen bypointing a torch light with a 45 degree angle on the LCD surface fromvery near distance.
The inverter must be tested by reading voltages with a multimeter.
The LCD ribbon cable/LCD display and connectors.
Thisis quite uncommon, but happens. If the TV had been hit or moved the LCDcable may have slipped out, or the LCD connector may be damaged.
The LCD controller board.
Thisis the board that controls the video signal, it is difficult to test,as there is need to read determined values on IC pins. To test thisboard you need to purchase a service manual and follow thetroubleshooting diagrams on service manual.
Input/Output Signal boards.
This are the boards where youconnect the video and audio cables, if a signal board is defective,then you may get no picture on particular inputs located on faultyboard.
If under warranty contact the manufacturer ringing the number on the user manual.
If you want to repair at your own expenses, just locate any good qualified repairer.
If you want to DIY you find parts here,
All: Appliance parts, electronics parts & more from PartStore.com
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LCD/Plasma Electronic Replacement Parts: Plasma & LCD TVs, Appliances |
Posted on Jul 18, 2009
You need to take the back off the set, with the power off, turn it on, then probe around with a long, wooden chopstick until you find the problem.
Posted on Apr 05, 2010
LCD backlight has gone out , you can verify this by holding a flash light up to the scene to see image , www.partstore.com or www.shopjimy.com where you can buy the part and put it in yourself would save you money
Posted on Oct 04, 2011
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