Question about Vizio L42HDTV 42 in. LCD Television
The tv just popped and then the screen had a black side and the other side had part of a picture but isn't black
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Posted on Jan 02, 2017
If you are using a set top box this might be caused by turnig the box on at the same tie as you turn the tv on or slightly after you turn the tv on. If you are using compnent or HDMI inputs the set needs to see the signal as it is turned on to know what formt the signal is in.
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Posted on Oct 23, 2007
SOURCE: vizio 42 hdtv lcd no power
lol , technicaly it's not possible to plug a USB PORT , into an RJ45 Phone Jack lol
But lets assume he did manage to do just that.
A. Land Lines in the united states phone system use -48 volts of electrical power.
B. USB ports that provide power to USB devices use +5 volts of electrical power.
What you have described to me would suggest to me that your USB port has been overloaded
by the input of a much higher voltage sourse ( the phone line )
Some suggested steps
1. completely unplug the computers power cable for approximately 15 seconds.
2. plug the computer back up and press the power button.
If this fails you may now have a defective motherboard or a blown power supply.
You have some options at this point.
You can change the power supply and see if that solves the issue
If a new power supply does not solve the issue
you will need to change the motherboard.
My advice on changing the motherboard is that you replace ONLY the motherboard first.
If more things like the Memory or CPU are dammaged , you will then replace them as needed.
I feel very dissapointed that your son was unable to accomplish his computer hacking goals lol
perhaps when he is older he will make a fine Engineer.
Thank you for using FixYa!
Posted on Sep 19, 2008
SOURCE: 42" Vizio - no picture no sound
If the TV goes in standby, then it is in protection mode.
Ensure also that the fault is not coming from a faulty receiver box sending
bad signal, check if you get same problem on DVD with no receiver box
Try first leaving the TV power cord unplugged for some times, let say one hour or so.
The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible causes.
1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.
2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , starting the flashing light.
If you are in situation one, then the TV will reset just unplugging power cord for one or two hours,sometimes even minutes.
If you are in situation 2 , then there is an internal fault.
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 |
On LCD Pay particular attention at inverter and power board, power board can be inspected looking for bulged or leaking capacitors, then tested with a multimeter. The inverter is more difficult to test , there is need to read voltages, should be done by a tech. Also the LCD controller board can cause same problem
Posted on May 04, 2009
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