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50PF95 the tv is stuck in standby
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jjay
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PostPosted: Mon Feb 02, 2009 3:09 am    Post subject: 50PF95 the tv is stuck in standby Reply with quote

hi there i have a LG 50PF95 the tv is stuck in standby

the standby light comes on and all the volume, programe up and down lights come on.

anyone help what might be the problem? is it a power supply problem with this set?


thanks
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jjay
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PostPosted: Tue Feb 03, 2009 10:38 pm    Post subject: Reply with quote

anyone please help as to why my lag plasma tv might be stuck on standby with just red led Crying or Very sad
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minnie



Joined: 18 Aug 2005
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PostPosted: Thu Feb 05, 2009 12:55 am    Post subject: Reply with quote

So the picture and sound come up then the set shuts down?
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jjay
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PostPosted: Thu Feb 05, 2009 8:31 am    Post subject: Reply with quote

no no picture or sound as it wont power up it just stops on red standby light? if i try and power on or press on on remote it just stops on standby with red led.?

any ideas? power supply problem ?
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fpc3



Joined: 02 Feb 2009
Posts: 31
Location: Shawnee, Kansas

PostPosted: Thu Feb 05, 2009 1:58 pm    Post subject: Reply with quote

my guess is that the smps for that TV has stopped functioning. The SMPS provides power for the remote operation as well as other funtions in the TV. In other words, when the TV is in standby, the SMPS is on and providing power to the remote control receiver within the TV. If that power is not being provided, the TV has no way to react to remote control commands.

My limited experience is that the SMPS also provides voltages for other functions. So, even local buttons on the TV will not function.

Your remote control does nothing? Do any buttons have an effect?

Frank
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jts1957



Joined: 24 Nov 2008
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PostPosted: Thu Feb 05, 2009 2:53 pm    Post subject: Reply with quote

If the SMPS has totally stopped functioning...how do red lights obtain power?
Some sets have a seperate "standby" power supply and some sets use a portion of the main SMPS to supply "standby" voltage(s).
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fpc3



Joined: 02 Feb 2009
Posts: 31
Location: Shawnee, Kansas

PostPosted: Thu Feb 05, 2009 3:18 pm    Post subject: Reply with quote

Thank JTS. Great point!

I was thinking it sounded similar to the receiver I am working on. In my case, the red LEDs flash as the SMPS attempts to function. I believe you are saying that since his are on solid, some portion of the SMPS or the standby supply (a 3rd supply?) is working.
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PostPosted: Thu Feb 05, 2009 3:33 pm    Post subject: Reply with quote

standby red led light comes on and the volume, program up and down leds come on but it refuses to switch on.

was working perfect then just turned it on one day and there was nothing.
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jjay
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PostPosted: Thu Feb 05, 2009 3:41 pm    Post subject: Reply with quote

sorry forgot to login on post above.

so any ideas guys? would this indicate something on the power supply blown?
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jts1957



Joined: 24 Nov 2008
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PostPosted: Thu Feb 05, 2009 5:20 pm    Post subject: Reply with quote

Also remember that these sets are built to shut down the SMPS if set detects a problem on any one of many circuits.
You could try unplugging connectors one at a time (or whole boards) and see if the set will come on the same or differently. If bad Y-sustain board, for example, unplugging may allow set to turn on / run with audio only.
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