Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


View this topic in a long page with up to 500 replies per page Create new topic
1 | 2 
Paul1977

3425 posts

Uber Geek


  #2050965 7-Jul-2018 09:35
Send private message

Update:

 

You would expect the TV to draw more amps while in standby and running a Pixel Refresher than it does while in standby when not running a Pixel Refresher. So I plugged the TV into a power meter and did some testing. Got some interesting results.

 

Results:

 

1. If I turn the TV off after less than 4 hours cumulative viewing, the draw drops to 0.13 after about 4 seconds of turning the TV off, so I used this as my baseline.

 

2. If I turn the TV off after greater than 4 hours cumulative viewing, the draw drops to around 0.31 for about 6 min 20 sec, it then drops to 0.13 (baseline). I'd read that the automatic Pixel Refresher takes approx 7-10 minutes, so I think this is close enough to assume that it is working.

 

3. Here's where it gets interesting. The manual Pixel Refresher is meant to take approx 1 hour. When I trigger one of these, the draw drops to 0.31 for a bit over 5 minutes it then drops to 0.13 (baseline). This is not what I would expect. But here is the kicker. This time the bloody TV did turn on again automatically! Unfortunately I didn't time this as I wasn't expecting it to happen, but I would guess maybe 45 minutes. It did still have a message saying the Pixel Refresher had been interrupted on the screen when it came back on.

 

Interpretations:

 

2 tells me that the automatic Pixel Refresher is most likely running as it should. This is reassuring, as that was my biggest concern.

 

3 tells me that the manual Pixel Refresher tries to do something, but doesn't complete the full process. But at least I can be somewhat reassured that the few times I have tried to run it and left it for hours that it looks like it hasn't been going crazy trying to refresh the pixels over and over for hours.

 

Pure Speculation:

 

I personally see 4 possibilities (and again, complete speculation on my part):

 

A. The manual Pixel Refresher starts, but for some reason the TV goes into full standby mode and powers down before it finishes.

 

B. The manual Pixel Refresher starts, but for some reason fails after 5 minutes.

 

C. It is a two stage process where it runs a mini cycle followed by a full cycle. The mini cycle completes, but the full cycle fails to start.

 

D. It is a two stage process where it runs a mini cycle, which then determines whether it needs to run the full cycle. If it doesn't need it, then it doesn't run. This is actually pretty close to what LG support initially told me, but contradicts anecdotal reports I have read. If this is the case though, they should fix the software so it doesn't give you the error message when you turn the TV back on (and update the description to say it only runs if required).


Paul1977

3425 posts

Uber Geek


  #2051069 7-Jul-2018 12:57
Send private message

Another update:

 

I wanted to reproduce result 3, but time how long it took before the TV came back on automatically. This time the amp draw dropped to 0.31 for the same approx 6 min 20 sec as it does during the automatic cycle, then dropped to 0.13 (baseline). But this time it was about another 2 hrs 45 min before the TV turned itself back on. I periodically checked the amp draw and it was at was at 0.13 every time I checked, so it looks like the TV was doing nothing at all in that time.

 

I think it's a firmware bug, possibly specific to only the Australasian C8PTA models.

 

If I were a betting man, I'd go with theory D from my speculations in my last post. I'd guess all the processes and functions are running correctly, but a firmware bug is causing it to turn back on after a seemingly random time (or not at all), and to  display the message about it the process being interrupted. Possibly something as simple as it not setting a "completed" flag if it determines the full process wasn't needed (another guess on my part). The idea of the TV being smart enough to only run the full 1 hour Pixel Refresher cycle would also explain why LG doesn't give the same warning as Sony does about running it too frequently.

 

Obviously take all of this with a HUGE grain of salt, as it is just a theory that seems to fit what I am seeing.

 

But I have lots of info now, so it will be interesting to see what LG comes back with.

 

P.S. I'm not crazy, I just like to get to the bottom of potential issues or peculiarities I discover - especially when it involves a rather significant dollar investment.

 

 


 
 
 
 


Paul1977

3425 posts

Uber Geek


  #2051408 8-Jul-2018 12:41
Send private message

Well, just as well I'm not a betting man.

 

Went back to reseller today to collect my new receiver and spoke to the sales rep at the same time about the Pixel Refresher.

 

We triggered a Pixel refresher on their floor model and the amp draw dropped to about what I saw on mine during a regular cycle for 6 or 7 minutes, then dropped right down to regular standby level. However; after an hour it displayed a Pixel Refresher In Progress message and ran a horizontal white line down the screen for a few seconds, then switched back on and said the Pixel refresher had completed.

 

Exact same model and firmware as my one, so a firmware bug seems unlikely. The only difference is the number of hours on the panel, mine is approaching 300 where their floor model was over 800.

 

I've also read on a forum that they talk about mA draw of the panel, and not the amp draw of the power supply which is all I am able to measure. So I may have been working on some false assumptions, and now I don't know if my measurements actually give any meaningful indication of whether it is running a process or not.


Paul1977

3425 posts

Uber Geek


  #2055305 12-Jul-2018 19:54
Send private message

Had my LG C8 exchanged, and the replacement successfully completed a manual Pixel Refresher cycle. 


1 | 2 
View this topic in a long page with up to 500 replies per page Create new topic





News »

Nanoleaf enhances lighting line with launch of Triangles and Mini Triangles
Posted 17-Oct-2020 20:18


Synology unveils DS16211+
Posted 17-Oct-2020 20:12


Ingram Micro introduces FootfallCam to New Zealand channel
Posted 17-Oct-2020 20:06


Dropbox adopts Virtual First working policy
Posted 17-Oct-2020 19:47


OPPO announces Reno4 Series 5G line-up in NZ
Posted 16-Oct-2020 08:52


Microsoft Highway to a Hundred expands to Asia Pacific
Posted 14-Oct-2020 09:34


Spark turns on 5G in Auckland
Posted 14-Oct-2020 09:29


AMD Launches AMD Ryzen 5000 Series Desktop Processors
Posted 9-Oct-2020 10:13


Teletrac Navman launches integrated multi-camera solution for transport and logistics industry
Posted 8-Oct-2020 10:57


Farmside hits 10,000 RBI customers
Posted 7-Oct-2020 15:32


NordVPN starts deploying colocated servers
Posted 7-Oct-2020 09:00


Google introduces Nest Wifi routers in New Zealand
Posted 7-Oct-2020 05:00


Orcon to bundle Google Nest Wifi router with new accounts
Posted 7-Oct-2020 05:00


Epay and Centrapay partner to create digital gift cards
Posted 2-Oct-2020 17:34


Inseego launches 5G MiFi M2000 mobile hotspot
Posted 2-Oct-2020 14:53









Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.