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Vizio TV E552VL bought in November 2011. No picture since last…

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Vizio TV E552VL bought in...
Vizio TV E552VL bought in November 2011. No picture since last month. Talked to Vizio representative - referred to ITI repair in our area (Penn Run, PA 15765). ITI sent repair person out. Replaced main board but didn't have inverter boards or power board - no picture. Was to get other boards but management for ITI later stated the TV was not repairable. Should I replace the other 3 boards before throwing away a $1200 TV? If so - where do I purchase the boards. Thank you, ***** ***** Campbell(###) ###-####
Submitted: 3 years ago.Category: TV
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Answered in 1 minute by:
6/9/2015
TV Technician: Anthony_Infotech, Technician replied 3 years ago
Anthony_Infotech
Anthony_Infotech, Technician
Category: TV
Satisfied Customers: 16,399
Experience: 20+ years experience TV expert (field and bench) 9 approved qualifications in TV-ELECTRONICS
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Hello my name is Anthony
Welcome
Thanks for the Question
Is there any sound?
Is the power-light lit as though the set is in the ON mode?
Anthony
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Customer reply replied 3 years ago
Anthony,
There is no sound. When looking in the back fins there is no light. The "vizio" emblem on the bottom turns white (yellow when off) when we turn the TV on . There is a click when we turn on the TV, which is normal when we turn it on.
***** *****
TV Technician: Anthony_Infotech, Technician replied 3 years ago
Does the remote control still turn the set on and off?
Connect up an input like a dvd player and keep pressing the INPUT button slowly do you get the sound through then?
Its the sound that's causing doubt about diagnosis
Anthony
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Customer reply replied 3 years ago
There is no sound or picture - black screen - with the cable or dvd player.
TV Technician: Anthony_Infotech, Technician replied 3 years ago
Does the remote control still turn the set on and off?
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Customer reply replied 3 years ago
Yes, you can hear the switch clicking on and off with the remote. Also the Vizio sign at the middle bot***** *****ges from yellow (off) to white (on).
TV Technician: Anthony_Infotech, Technician replied 3 years ago
Can you see any visible light at all on the display please?even a dull glow in a darkened room?
Because of the no sound no pic symptom and maybe a black or low glow display checks with a meter on the power-board is needed to make sure all the supply voltages are up can you use a meter?
Anthony
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Customer reply replied 3 years ago
The screen is black even in the dark. I can use a volt meter but would not know where to check or what the volts/amps should be.
Rob
TV Technician: Anthony_Infotech, Technician replied 3 years ago
OK you need to get the back off the set and let me know if there is a stamping with the voltages for the powerboard outputs on the board itself just trace the powercord to powerboards
You will see this next to the output plug(s) to the main-board (one with AV connectors on
Anthony
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