Question about Vizio L32 32 in. LCD HDTV
I have repaired several lcd tvs now and this is the first one i have seen do this.
when you plug it in the light (yellow maybe? green?) comes on for a second and then off, while this is happening there is a very high pitch squeal coming from the back that seems to increase in pitch, then when the light goes dark the sound goes away.
and then it starts all over again and continues until you unplug it.
i have cracked the case on it and looked through the power and control board . i only see one issue on the power supply, the large 450v 150pf cap is just barely extended, have not discharged the cap yet to see if it holds charge or not.
need help on this one, it is for a friend who is way down on their luck and really needs some good fortune
thanks in advance
Great thanks for the info, i was wondering whether or not the transformer could be damaged. like i said the cap in question is ever so slightly bulged, no leaks or cracks / blast marks, so i am not toally convinced that it is the cap, but i guess it is worth the 4-5$ to find out. since i have to remove it to test it anyway.
i just wish it would stay powered up long enough to do some testing, and with the noise it is making i am very hesitant to stick my hands anywhere near it knowing that kind of voltage is being discharged.
even if the transformer is bad i have all the right size and type wire to re-wind it myself.
i do appreciate your words of caution, i have learned through the years how not to get shocked and i follow all those rules very carefully (got shocked by a flyback on a 36" crt a few years ago, never again) i will keep you guys posted on the situation. thanks again.
Posted on May 07, 2008
Transformers on power supplys can make that high pitch noise... Did you say that Cap looks extended like Bulging at the top?
Well if your going to attempt this yourself which I feel you are please be careful I could sit here and type paragraphs on what to do but I feel you have enough knowledge to just read up on it.
Capacitors aren't hard to replace.. but... but... that cap could have damaged the transformer so its not converting enough AC to DC.
Good thing is you have ALOT to read before starting please
Bad thing is you might need a new power supply also.
Ok go here it has TONS of info on CAPS tips/tricks
I have replaced so many electronic parts... sometimes I worry about sending people off to do it on their own. Please read all the relivent information on the site.
If you need more help like finding the correct CAP or using 2 Caps in parallel to get the correct pf amount let me know.
Posted on May 07, 2008
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Posted on Jan 02, 2017
Tips for a great answer:
Jul 25, 2015 | Vizio L32 32 in. LCD HDTV
you'll need to do a master reset of the device
check link -->www.retrevo.com/support/Vizio-L32-TVs-manual/id/512dj084/t/2
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