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Sound works not picture, i have taken off back to inspect…

Customer Question
Sound works not picture ...

Sound works not picture

Technician's Assistant: Are there any HDMI cables or A/V jacks (red, yellow, and white cables) plugged into your TV?

I have taken off back to inspect components

Technician's Assistant: Was there a power outage recently?

Seems two fuses in main power board are receiving too much volatage and third appears to have no voltage

Submitted: 1 month ago.Category: TV
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Answered in 1 minute by:
3/6/2018
TV Technician: Jack, Technician replied 1 month ago
Jack
Jack, Technician
Category: TV
Satisfied Customers: 11,036
Experience: 40 years experience as audio,video repair and installation tech
Verified

Hello, My name is ***** ***** I'll be helping you with this.

A few questions coming up and please note that there may be delays between replies if i have to gather various info ;
Also ,Could you please give me the model number written on the tv`s back cover ?

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Customer reply replied 1 month ago
LG 60PZ750
TV Technician: Jack, Technician replied 1 month ago

Sorry then but this is nt what i thought and will opt out

You don`t have to do anything , your question will be reposted for other techs. to see and jump in.
Please just standby and someone should be with you shortly .

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Customer reply replied 1 month ago
Ok thanks
TV Technician: Eldon, Technician replied 1 month ago
Eldon
Eldon, Technician
Category: TV
Satisfied Customers: 237
Experience: Engineer at Tech company
Verified

Hello and sorry to hear you're having trouble with your tv.

Do you see the screen lighting up/glowing at all?

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Customer reply replied 1 month ago
No not at all
Customer reply replied 1 month ago
TV Technician: Eldon, Technician replied 1 month ago

Yes I know it is a plasma, just wanted to confirm if the panel is priming at all,

so this would typically indicate a bad Y sus board, did you check the fuses on it?

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Customer reply replied 1 month ago
Ki don’t see any fuses on y sus
Customer reply replied 1 month ago
Wait yes 250
Customer reply replied 1 month ago
seems to work
Customer reply replied 1 month ago
But main power board has three fuses two seem to be putting out in excess of 250 v and a third 0 v
TV Technician: Eldon, Technician replied 1 month ago

Yes there should be a ceramic fuse there, 250v,

so if that fuse is ok, then it is another component on that ymain board as the most likely fault,

what are the power board outputs looking like? Check the voltages on all the psu output pins against the marked expected voltages there,

if they are ok, then the ysus would need to be replaced, or rather rebuilt as parts for this are no longer available.

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Customer reply replied 1 month ago
Power board outputs seem to be reading correctly but the fuses are off as noted
TV Technician: Eldon, Technician replied 1 month ago

I'm not worried about those at this point, the other board isn't drawing power in the first place,

so I would go ahead with refurbing that Y board, you can send it in for repair here: http://www.coppelltvrepair.com/p/1426/lg-60pz750-ug-auszlhr-ysus-repair-service-for-no-image-failing-to-start-or-shutting-down-tv-problem or http://www.ptselectronicsinc.com/EBR73561201/

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Customer reply replied 1 month ago
sorry im a little confused y sus board seems to have power...right? the fuse was reading 250 v and psu output pins working
TV Technician: Eldon, Technician replied 1 month ago

Yes, this is not a matter of it having power or not, there are many other components on that board that can and do fail.

If it wasn't getting power in the first place I'd tell you to replace the power supply.

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TV Technician: Eldon, Technician replied 1 month ago

Hello, it appears your question is still open.
Do you need more help with this?

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Eldon
Eldon
Eldon, Technician
Category: TV
Satisfied Customers: 237
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Experience: Engineer at Tech company

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