Riddled TV Repair Forum

suwalski · Joined: 11 Jul 2011 Posts: 6 Location: Ottawa, ON

Hi guys,

I have an LCD TV that runs perfectly for 5-10 minutes, then clicks off and back on, but stays on for shorter and shorter amounts of time (never more than 30s).

Basically, it behaves like an overheating device, though I'm not feeling any extreme temperatures.

The diagnostic page suggests that it's the inverter or the power supply based on the fail code.

What do the experts think? Gut feeling: power supply or inverter boards?

Many thanks.

Google

kuhurdler · Joined: 28 Dec 2006 Posts: 2582 Location: Overland Park, KS

model number

JTS1957 · Joined: 21 Jan 2009 Posts: 1387 Location: Far, Far Away

http://www.riddledtv.com/forums/read-me-first-before-posting-t5.html

suwalski · Joined: 11 Jul 2011 Posts: 6 Location: Ottawa, ON

Sorry, I was hoping to leave the model out of it, which is why I was asking for a model-nonspecific gut feeling.

It's a Sony KDL-42V4100. Six blinks. The tech manual claims it's one of those two boards. But since the backlight works perfectly for minutes at a time, I thought that a gut feeling could be formed as to whether it's the inverters or power supply.

CelicaSupra · Joined: 30 Nov 2011 Posts: 16 Location: Crewe

So are you saying the whole set switches off or just the backlight goes out? The way I read it you mean the whole thing powers off

OK gut feeling FWIW I'd say power board... but then you shouldn't really rely on gut feelings & the model numbers can be significant in that maybe somebody knows of a common fault with a particular model.

Google

kuhurdler · Joined: 28 Dec 2006 Posts: 2582 Location: Overland Park, KS

I'd guess inverter. You can check the power supply while it's running. I don't know if you're going to get a solid answer on which one it is for certain.

JTS1957 · Joined: 21 Jan 2009 Posts: 1387 Location: Far, Far Away

It's 100%, absolutely, positively the Inverter ... (unless it's something else). Very Happy

suwalski · Joined: 11 Jul 2011 Posts: 6 Location: Ottawa, ON

Thanks, gentlemen. It wasn't unanimous, but I think the inverters are the right place to start, so I ordered a set.

suwalski · Joined: 11 Jul 2011 Posts: 6 Location: Ottawa, ON

Hey guys,

The inverters came yesterday, I put them in, and sure enough, the TV's been up and running for a full day.

Thank you so much to those who answered.

I got my parts really fast from ShopJimmy. I wonder if there are any interested parties in the previous inverters, which worked perfectly for a few minutes at a time? Otherwise, it's recycling for them...