LG 55LV5500 no picture or sound

[jcorkin]

So my LG tv quit working. I opened her up and didnt see any bulged caps or burnt spots on the power supply, which is what i suspect went bad. The main relay on the power supply clicks but i get no audio and no picture/backlight. The front status/power light cycles between red and white when switching it on and off but nothing. Am i correct to assume the power supply has died or is this model known to have other issues? I must say i was pleased with the build quality of the power supply while I was in there. Thanks for any help.

[budm]

Re: LG 55LV5500 no picture or sound

We need this first:
https://www.badcaps.net/forum/showthread.php?t=39740
Then we can see what we are dealing with, and then we can tell you at what test points you need to test to narrow the cause of the problem.

[jcorkin]

Re: LG 55LV5500 no picture or sound

I already put the tv back together but I pulled the part # off of it prior to putting it back together. This link is to the identical board that is in question.
http://www.ebay.com/itm/331865606784...%3AMEBIDX%3AIT

[budm]

Re: LG 55LV5500 no picture or sound

You need to take DCV readings of the connectors P701, P832, P201 when the TV is OFF and when the power switch is activated to find out what Voltages are missing or not changing state.
You MUST pin down the pin number and pin name for each Voltage reading.
LG EAY62169901 (EAX62876201/8) Power Supply 55LV5400 55LV5500 55LW5300 55LW5700

http://www.shopjimmy.com/lg-eay62169...pply-unit.htm#

Pictures provided by shopjimmy.

[jcorkin]

Re: LG 55LV5500 no picture or sound

So I came home for lunch today and the dang tv turned on just fine.

[budm]

Re: LG 55LV5500 no picture or sound

If I were you I would retouch all the solder joints of the transformer legs, all the legs of the devices mounted on the heatsinks, and give really good visual inspection, reseaet all the cables, tighten all the board mounting screws, etc.