DLite Posted May 4, 2023 Share Posted May 4, 2023 I have a puzzling problem with two 8" T4 touch screens. A few weeks ago, both of them started intermittently flickering; imagine the screen shifting to the left and back very rapidly to create a flicker. We have 7 other touch screens of different types (5 T4 10" screens and 2 T3's), all of which are fine. While I cannot reproduce the flickering on demand, it seems to be much more likely when the brightness is low, and I have seen this behavior begin immediately after a programmatic change in brightness on numerous occasions. At a minimum, it's highly correlated with changes in brightness and with low brightness settings. I would have assumed this to be a hardware problem, but I'm mystified that the same issue happened at exactly the same time on both of our 8" T4s. It seems pretty unlikely that hardware failures would happen simultaneously on two units. It makes me wonder if this was a bad software update to the touch screens instead. Is this a hardware issue that I should seek replacements for? Or should I just wait for a software fix? I imagine replacements are going to take forever and a day to arrive, so I'm hoping for the latter. Thanks Quote Link to comment Share on other sites More sharing options...
South Africa C4 user Posted May 4, 2023 Share Posted May 4, 2023 I would have concluded the same as you. Hardware being more likely bit both failing at the same time tends to imply software (or power surge damage of some sort). Have you checked that your T4s (working and broken) are all on the same software version? You could have your dealer reflash the 2 problem Touchscreens… Quote Link to comment Share on other sites More sharing options...
Cyknight Posted May 4, 2023 Share Posted May 4, 2023 1 hour ago, DLite said: Is this a hardware issue that I should seek replacements for? Take a video when it happens next and get them replaced. This is a known issue with certain batches of 8" T4 screens Quote Link to comment Share on other sites More sharing options...
DLite Posted May 4, 2023 Author Share Posted May 4, 2023 8 hours ago, Cyknight said: Take a video when it happens next and get them replaced. This is a known issue with certain batches of 8" T4 screens Thanks, that is good to know. I guess it was just an unlucky coincidence that they both went south at the same time. Quote Link to comment Share on other sites More sharing options...
msgreenf Posted May 4, 2023 Share Posted May 4, 2023 If they were purchased at the same time not that much of a coincidence. Same batch... Quote Link to comment Share on other sites More sharing options...
penn65000 Posted May 27, 2023 Share Posted May 27, 2023 On 5/4/2023 at 12:36 AM, DLite said: I have a puzzling problem with two 8" T4 touch screens. A few weeks ago, both of them started intermittently flickering; imagine the screen shifting to the left and back very rapidly to create a flicker. We have 7 other touch screens of different types (5 T4 10" screens and 2 T3's), all of which are fine. While I cannot reproduce the flickering on demand, it seems to be much more likely when the brightness is low, and I have seen this behavior begin immediately after a programmatic change in brightness on numerous occasions. At a minimum, it's highly correlated with changes in brightness and with low brightness settings. I would have assumed this to be a hardware problem, but I'm mystified that the same issue happened at exactly the same time on both of our 8" T4s. It seems pretty unlikely that hardware failures would happen simultaneously on two units. It makes me wonder if this was a bad software update to the touch screens instead. Is this a hardware issue that I should seek replacements for? Or should I just wait for a software fix? I imagine replacements are going to take forever and a day to arrive, so I'm hoping for the latter. Thanks Same issue here. Two T4s. Horrible. C4 regional rep coming to our home. Repeated issues with Core 1, all neeos dying. Two new T4s bad IMG_3388.mov IMG_3387.mov Quote Link to comment Share on other sites More sharing options...
msgreenf Posted May 27, 2023 Share Posted May 27, 2023 10 minutes ago, Haze said: Same issue here. Two T4s. Horrible. C4 regional rep coming to our home. Repeated issues with Core 1, all neeos dying. Two new T4s bad IMG_3388.mov IMG_3387.mov Are you in a mixed mesh w core and ea? Quote Link to comment Share on other sites More sharing options...
penn65000 Posted May 27, 2023 Share Posted May 27, 2023 9 minutes ago, msgreenf said: Are you in a mixed mesh w core and ea? Have two core1. Rest of house is ea other than ca10 running everything. Quote Link to comment Share on other sites More sharing options...
msgreenf Posted May 27, 2023 Share Posted May 27, 2023 7 hours ago, penn65000 said: Have two core1. Rest of house is ea other than ca10 running everything. Running ZigBee on both? Quote Link to comment Share on other sites More sharing options...
penn65000 Posted May 27, 2023 Share Posted May 27, 2023 4 hours ago, msgreenf said: Running ZigBee on both? No idea but Diamond dealer or equivalent Quote Link to comment Share on other sites More sharing options...
msgreenf Posted May 27, 2023 Share Posted May 27, 2023 1 minute ago, penn65000 said: No idea but Diamond dealer or equivalent I don't care your dealers status. Are you running 3.3.3 you should Quote Link to comment Share on other sites More sharing options...
eggzlot Posted May 27, 2023 Share Posted May 27, 2023 I am starting to notice flickering on my T4 also, but it appears to only happen at night after like 9/930. And I have it auto shut off at 10pm every night. Quote Link to comment Share on other sites More sharing options...
penn65000 Posted May 27, 2023 Share Posted May 27, 2023 9 minutes ago, msgreenf said: I don't care your dealers status. Are you running 3.3.3 you should Yea running 3.3.3 msgreenf 1 Quote Link to comment Share on other sites More sharing options...
penn65000 Posted May 27, 2023 Share Posted May 27, 2023 1 hour ago, eggzlot said: I am starting to notice flickering on my T4 also, but it appears to only happen at night after like 9/930. And I have it auto shut off at 10pm every night. Quote Link to comment Share on other sites More sharing options...
DLite Posted May 27, 2023 Author Share Posted May 27, 2023 3 hours ago, eggzlot said: I am starting to notice flickering on my T4 also, but it appears to only happen at night after like 9/930. And I have it auto shut off at 10pm every night. Interestingly, that is exactly how mine started too. By any chance, do you have auto-brightness turned on, so that it dims at night? I notice it seems more likely when brightness changes, and especially when it gets dimmer. (However, this is not a hard and fast rule, only something that appears to predict relative risk.) Quote Link to comment Share on other sites More sharing options...
penn65000 Posted May 27, 2023 Share Posted May 27, 2023 3 hours ago, eggzlot said: I am starting to notice flickering on my T4 also, but it appears to only happen at night after like 9/930. And I have it auto shut off at 10pm every night. Don’t know re autobrightness but don’t car. Told C4 to replace them all and all our neeos. Regional rep coming to our house. Quote Link to comment Share on other sites More sharing options...
Andrew luecke Posted May 27, 2023 Share Posted May 27, 2023 4 hours ago, penn65000 said: Don’t know re autobrightness but don’t car. Told C4 to replace them all and all our neeos. Regional rep coming to our house. What poe switch are you using? Quote Link to comment Share on other sites More sharing options...
msgreenf Posted May 27, 2023 Share Posted May 27, 2023 @eggzlot got Texas Poe mid spans Quote Link to comment Share on other sites More sharing options...
penn65000 Posted May 28, 2023 Share Posted May 28, 2023 5 hours ago, Andrew luecke said: What poe switch are you using? Plugged directly into wall. Table top via Wi-Fi. Quote Link to comment Share on other sites More sharing options...
eggzlot Posted May 28, 2023 Share Posted May 28, 2023 14 hours ago, msgreenf said: @eggzlot got Texas Poe mid spans Well that but this is off a Cisco sg300 switch. Only 4 devices in there for PoE rest on Texas poe mid spans Quote Link to comment Share on other sites More sharing options...
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