Question about Westinghouse LTV-32w1 32 in. HD-Ready LCD Television

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LTV32w1 - powers up, indicator goes from blue to yellow. no sound and no picture. I've seen a lot of data on power supply issues and cold joints. is there any good pics or ideas on best way to get to the area, dont want to take off more than needed to get to the power supply

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You need to remove the base and lay it down flat on a soft surface and remove all the screws on the back and pry open the back. Look for cold joints, the one in my pictures has cold joints on the one of the leg of retangular grey cap. I would usally inspect the board real well with magnifying glass and resolder just about all joints just to sure.
http://s807.photobucket.com/albums/yy352/budm/Westinghouse%20LTV-32W1/

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.

Please post back what you find

Posted on Nov 13, 2010

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Hi,
This model develops bad solder joints on the connector between the power supply and the led driver board and loses backlighting. It's hard to believe, but the whole connection goes bad. All those pins supply only 24v and gnd. Resolder all of them and the tv will work.
It's the connector between that large yellow board (p/s) and the center green board (led driver).

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Hi patmac2,

First of all, thank you for posting your question here at Fixya.
Random subsequent turned off and on like what you've described is mostly caused by the following.
1. Excessive heat - if the unit turned off and on randomly after a few hours of being power on, then high chance that the parts gone to heat build up that trigger the thermal protection circuitry to kick on. If this is the case, I would advice you to give the unit's vent a proper ventilation, keep away all the obstruction to have a sufficient air flow.
2. Bad solder joints - cracked, dried, cold solder is one of the common caused of the symptoms you've mentioned. I would advice you to check the power supply board for bad solder joints, it is hard to spot, I would advice you to work on the brightest area or used portable lamp and magnifying glass, re-solder all suspected joints.
3. Power supply malfunction - Once the power supply board gone to overload, out-of-regulation condition, the feedback circuitry will sensed it and will caused for randomly shuts down. I would advice you to check the power supply board's electrolytic filter capacitor. Partially faulty (leaky,dried) electrolytic capacitor can produce out-of-regulation condition on the power supply. Most of the faulty electrolytic capacitor has a physical indication of fault like bulged/dome at the top and can be easily identify through visual inspection. If your unit is not under warranty period, inspect it from the power supply board. See sample picture of bad capacitor with dome at the top.


1_4_2012_2_39_29_am.jpg


Electrolytic capacitor info.





If you've confirmed that excessive heat, bad solder joints, electrolytic capacitor are isolated and not the issue, I would advice you to replaced the entire power supply board (part number : 75014421). I saw it in stock at this link : http://www.partsimple.com/75014421-tos-n-3.html .

Hope I helped you.
Have a great day!
Rating and feedback are highly appreciated!

Jdvillanueva

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Sir this blinking light commonly indicates an error, most of the error comes from the power supply. Unplug the unit from the main AC outlet then remove the back cover of your unit then observe carefully the parts specially the capacitor. Provably the power supply has a bulging top capacitor this bulge up capacitor produces a low and unfiltered dc supply that causes your unit to malfunction. ekcnoel_31.jpg
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In number 2, the power supply board might have loose or cold solder joints, when gets hot, temporarily opens the cold solder, then connects itself again when the TV cools down, If this is the case then you need a technician to find the loose joint. As for number 1, the inverter board needs replacement, you also need a technician to do the replacement.

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billdozier@gmail.com

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