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Crumbtrail TV Forums: TV Equipment: LCD TV Forum:
42inch touch screen not powering up

 
 


epicfatigue
New User

Dec 1, 2011, 10:21 AM

Post #1 of 4 (2134 views)
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42inch touch screen not powering up Can't Post
hello
have an unknown brand LCD touchscreen tv 42inch.
Run perfectly then one day just didnt turn on.
Pulled the back off to have a quick inspection of the CAPs.
They all appear to be fine, waiting on a multimeter.
Going to test the poer suply and see if its okay, if it checks out fine would the main board or the T-con board be the first point of trouble shooting.

Thanks.
Also any ideas on how to check what brand the unit is? no makring on the outside of the TV.



jts1957
Veteran


Dec 1, 2011, 1:48 PM

Post #2 of 4 (2128 views)
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Re: [epicfatigue] 42inch touch screen not powering up [In reply to] Can't Post
The unknown brand didn't seem to bother you when you selected and paid for this set. (My bet is that the price of this TV was the deciding factor). You didn't say if unit was new or new to you, so I went with new.
The unknown brand didn't stand out on the receipt paperwork for this set, on the box the TV arrived in, the User manual that came with it or on the remote hand unit.Shocked


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Location: Far, Far Away


epicfatigue
New User

Dec 1, 2011, 10:32 PM

Post #3 of 4 (2123 views)
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Re: [jts1957] 42inch touch screen not powering up [In reply to] Can't Post
The unit is 7000 and is just out of warrenty.It is a industrial unit it was used in a show case.
It is unknown because it is a tv inside a tv.
My guess is its either a samgsung or an LG.
As the power suply is only used in those models.
The tcon card is an LG the power invertor is an lg.

The main board has fujitsu sumgsung ics on it.
The tvsceen has been pulled out of its case anD esembled inside a IR touchscreen unit.
Hence why its so expensive I don't have the recipt because the company I work with gave it to me and upgraded to 80 inch ones. There was 8 of these in the case they all stopped working at the same time.
My guess is a surge of some kind.

The power invertor looks like all the solder joints have gotten hot at one stage. Is this a common problem or could it be cased by a faulty component.
LG invertor = LC420WU
Power Supply = PVP-3140


(This post was edited by epicfatigue on Dec 1, 2011, 11:20 PM)


epicfatigue
New User

Dec 1, 2011, 11:50 PM

Post #4 of 4 (2118 views)
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Re: [epicfatigue] 42inch touch screen not powering up [In reply to] Can't Post
cant seem to upload pictures.

Pictures are here
http://www.badcaps.net/forum/showthread.php?p=200467&posted=1#post200467

 
 
 


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