Question about Philips Magnavox 42MF521D/37 Television
My Vizio 42 inch made a loud cracking sound and then the picture went out. I still have sound but the picture won't come back on ? I have a chance to receive a free Magnavox 42" Plasma television that after about 16 months went dark on the picture but still has sound. I wanted to see if this would be worth getting fixed or would the money spent be better spent elsewhere?
Regarding the Plasma TV with dark picture, this is often caused by bad sustain board, replacing the Ysus Zsus kit may solfe the problem.
Regarding instead the Vizio with sound but no picture:
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:
The inverter is the high voltage board that provides variable power to the backlight lamp. This is the most common. When inverter is faulty you can get no picture, or a very dim picture that can only be seen by pointing a torch light with a 45 degree angle on the LCD surface from very near distance.
The inverter must be tested by reading voltages with a multimeter.
The LCD ribbon cable/LCD display and connectors.
This is quite uncommon, but happens. If the TV had been hit or moved the LCD cable may have slipped out, or the LCD connector may be damaged.
The LCD controller board.
This is 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 this board you need to purchase a service manual and follow the troubleshooting diagrams on service manual.
Input/Output Signal boards.
This are the boards where you connect the video and audio cables, if a signal board is defective, then you may get no picture on particular inputs located on faulty board.
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
Encompass Parts Distribution
LCD/Plasma Electronic Replacement Parts: Plasma & LCD TVs, Appliances |
Posted on May 05, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Dec 30, 2015 | Vizio VP422HDTV10A 42 inch 720p LCD HDTV
Oct 04, 2009 | Televison & Video
Sep 07, 2009 | Vizio VW42LF 42 in. LCD HDTV
Jun 01, 2009 | Vizio P2 42 in. HD-Ready Plasma Television
Jan 17, 2009 | Vizio P2 42 in. HD-Ready Plasma Television
Jan 14, 2008 | Vizio P2 42 in. HD-Ready Plasma Television
505 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: