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[Ed in Tx]

Originally Posted by JohnCT

As for the 100K lifetime, we'll see. We were told at the service seminars that LEDs would last well beyond CCFL, but field examples told a different story.

Any filtering scheme is still subject to fade, particularly the blue because it's nearly impossible to to filter out UV light from the source, even LED lighting. Plasma, LCD TVs, LCD projectors (particularly) show evidence of yellowing as they age...
John

My old Sony 40" CCFL, I just checked, 65,535 hours since 2008 when I bought it. Has never been serviced. Only issue is the blue that I may eventually have to replace it for. It is apparently fading and I think you just confirmed what I've been seeing. I have to run the red and green all the way down to get close to a gray scale now.

[JohnCT]

Originally Posted by Ed in Tx

My old Sony 40" CCFL, I just checked, 65,535 hours since 2008 when I bought it. Has never been serviced. Only issue is the blue that I may eventually have to replace it for. It is apparently fading and I think you just confirmed what I've been seeing. I have to run the red and green all the way down to get close to a gray scale now.

I'm not completely sure but I believe at least part of the yellowing in CCFL TVs might be a color temperature shift of the tubes themselves. It certainly isn't all of it because occasionally I'll still change a single open CCFL tube from scrap stock, and there's not a lot of difference of gray scale when viewing a white pattern in the area where the replaced CCFL tube lives. But we certainly see the yellow mange in high-hour LED back lit TVs as well.

John

[mr_rye89]

The 50" Runco plasma monitor I had had fans in it, pretty quiet though, I didn't ever hear them run. As for OLED, I'm waiting for some kind of flexible TV that I can roll back up into the ceiling like a projection screen

[Eric H]

Originally Posted by Ed in Tx

My old Sony 40" CCFL, I just checked, 65,535 hours since 2008 when I bought it..

That's an insane number of hours, you must leave it running all the time?

I had a Sony LCD rear projector for my first HD set in 2004 or 2005, it had 10,000+ hours on it when I replaced it in 2009 with a Plasma during Circuit City's closeout sale, I thought that was pretty heavy use.

The 2009 set got replaced in May of 2014 with another Panny Plasma, the old one worked but I was afraid it would die and no more Plasmas.

I just checked the hours on both Panasonics, they are within a few hundred hours of each other, the newer set has fewer hours but more on/off cycles.

I watch a lot less TV than I used to, though Isolating has kind of upped the time spent in front of the TV again.

[Ed in Tx]

Originally Posted by Eric H

That's an insane number of hours, you must leave it running all the time?

Gets turned on about 6:45 AM and turned off around Midnight so it's on about 18 hours a day, like me!

To offset that I have my 2002 Trailblazer, I am the original owner, with 32,000 miles on it. One might think I watch a lot of TV and never go anywhere.

[Ed in Tx]

Well this is odd.. the Sony's hour counter has stopped counting. Still on 65535 hours like last week when I checked it. I guess it ran to the limit. I'll have to check the power on counter and see if it still counts.

[Eric H]

Originally Posted by Ed in Tx

Well this is odd.. the Sony's hour counter has stopped counting. Still on 65535 hours like last week when I checked it. I guess it ran to the limit. I'll have to check the power on counter and see if it still counts.

Might be like some Toyota's where the Odometer won't go past 299,000 miles.

[Ed in Tx]

Originally Posted by Eric H

Might be like some Toyota's where the Odometer won't go past 299,000 miles.

I think you might be right.
I figure it should be closer to 74,000 hours now, based on 17 hours a day for 12 years.The power-on counter still works though. It hit 4999 this morning.

Have an older pic I originally posted over on AVS forum from June 2018 when it was almost 57,000 hours then.

[jr_tech]

Originally Posted by Ed in Tx

Well this is odd.. the Sony's hour counter has stopped counting. Still on 65535 hours like last week when I checked it. I guess it ran to the limit. I'll have to check the power on counter and see if it still counts.

65535 equals FFFF in hex...looks like you hit the limit of the counter. 65536 rolls the hex count to 10000.

jr

[Eric H]

Originally Posted by jr_tech

65535 equals FFFF in hex...looks like you hit the limit of the counter. 65536 rolls the hex count to 10000.

jr

They probably figured very few people would ever hit the limit.

[Eric H]

Originally Posted by jr_tech

65535 equals FFFF in hex...looks like you hit the limit of the counter. 65536 rolls the hex count to 10000.

jr

They probably figured very few people would ever hit the limit.

[JohnCT]

Originally Posted by jr_tech

65535 equals FFFF in hex...looks like you hit the limit of the counter. 65536 rolls the hex count to 10000.

jr

Excellent observation. I wondered why it would stop at what appeared to be such a random number. Binary makes perfect sense.

John

[Ed in Tx]

Definitely explains it... Thanks!