[FINALLY SOLVED!] NUC7i3BNK Screen Flashing (screen turns on and off) and steaking green lines when using 4K resolutions on LG uhdtv and onkyo avr

[FMacF]

I've finally figured it out. In essence, it's the LG TV "fighting" against the Windows display config to give the best visual output.

See https://www.lg.com/ca_en/support/product-help/CT20098005-1437131182045-menu-settings

It's a feature of LG TVs called "HDMI ULTRA HD Deep Colour" - not all devices support it.

(it's worth mentioning that it could also be the TruMotion settings - I disabled both and it suddenly started working perfectly. No green lines, no flashing, perfect 👌)

Reposting this because the original thread seems to have disappeared...

Re: NUC7ixBN Screen Flashing (screen turns on and off) when using 4K resolutions

posted 11 28, 18 9:11 PM

Hi Team,

29th November 2018 and this issue still seems to be happening...

I'm having the same issues with my new Intel NUC BOXNUC7I3BNK connecting via HDMI through my new Onkyo tx-nr686 AVR to my LG 4K TV. Constantly stutters with black screen flashes (and occasionally has fine green horizontal lines running through intermittently too) in all areas of Windows 10 (latest updates) - login screen, desktop, VLC, Media Player Classic, Windows Film & TV app, etc etc etc.

The system is as follows:

• Intel NUC BOXNUC7I3BNK
• GSKILL 8GB DDR4 F4-2133C15S-8GRS
• WD 240G Green M.2 SSD (G2 Version) WDS240G2G0B
• Onkyo TX-NR686 AVR (latest firmware)
• LG UF850T 4K TV (latest firmware)
• Running Windows 10 (latest updates)
• Latest updates from Intel Driver & Support Assistant for chipset etc
• Latest BIOS: BIOS Update [BNKBL357.86A] Date: 11/02/2018 Version: 0071 (Latest)
• Latest GFX Driver: Legacy Intel® Graphics Driver for Windows® 10 Version: 25.20.100.6323 (Previously Released) Date: 10/1/2018
• Latest HDMI Firmware 1.72

I've tried a brand new HDMI 2.0b cable, an older HDMI cable and a shielded HDMI 1.4 connector, and all experience the same flickering and green lines (the shielded 1.4 is noticeably better than the rest, but it's still flashing off and on a few times a minute. The 2.0b is unbearable, constantly flicking off and on every few seconds).

Played around with different resolutions and refresh rates on the gfx card. Happens about the same at 4K res or 1080p res, but it's definitely much reduced when running at lower refresh rates (50Hz or less), not ideal really for a media PC i built specifically for High Def 4K media playing  

When connected to the TV directly, the flickering is reduced a little, but not eliminated entirely (and besides that, it's incredibly inconvenient to do this as i bought the nuc so to get around having too many cables everywhere so I could just use hdmi).

Seems to me to indicate it's a driver, firmware or bios issue, or maybe a RAM compatibility issue?

***Update

I have replaced the gskill dimm with a Crucial dimm (details below) which is from the Intel recommended parts list, but the issue still persists. No improvement at all.

Crucial 8GB DDR4 2400 MT/s (PC4-19200) CL17 SR x8 Unbuffered SODIMM 260pin Single Ranked

Model Number:

CT8G4SFS824A

[Leonardo_C_Intel]

Hello FMacF Thank you for posting in the Intel Community. • What other input devices are currently connected to the Intel® NUC? • Have you tested the Intel® NUC with only the Display + keyboard + mouse? • Is it possible to test the Intel® with another display? In case this you have the same behavior after the testing try contacting Intel® support (https://www.intel.com/content/www/us/en/support/contact-support.html) on your region for warranty options. Hope this helps. Regards, Leonardo C. Intel Customer Support Technician Under Contract to Intel Corporation

[FMacF]

Hi Leonardo, No other input devices are connected (just the logitech unifying receiver), so i only use it with the display, keyboard and mouse. Haven't got another 4k TV to test with unfortunately 😭

[Leonardo_C_Intel]

Hello FMacF Thank you for the information. • Have you tested the Intel® NUC whit wired connections? • Do you have the possibility to test it with any other display? As mentioned previously you can try contacting Intel® support (https://www.intel.com/content/www/us/en/support/contact-support.html) on your region for warranty options. Hope this helps. Regards, Leonardo C. Intel Customer Support Technician Under Contract to Intel Corporation

[BSchi2]

Same exact issue here (on/off flash, plus periodic streak horizontal flash of green pixels, at random locations) with a brand new out of box NUC8I7BEH. Clean install of Win10. Graphics drivers v. 24.20.100.6287. Running at 4k/60hz on a Dell U2718Q Monitor.

LeoC_Intel, this can't be the result of the display....it's either a NUC, Cable, or SW (Likely, but unsure whether it's Windows or driver related). I'm not having any luck finding answers on this...going to try a new cable. May consider the return of the NUC.

[BSchi2]

I'm not well read up on this...but looks like it may be a windows issue from the last update. Some services at the root. I saw a suggesting to disable the service "Windows Error Reporting" and "Problem REports and Solutions Control Panel Reports".

right-click windows button, select run

run "msconfig"

tab "services"

Uncheck those above service, apply and restart.

So far so good for me, but it's only been a short while. Hope that helps!

[MMark43]

Hi guys,

i am having the same issue... for more than three months i am trying to find a solution or hope that intel would finally do something about it. i feel like i have been ripped of and cheated since in the product specs they say 4k 60hz supported. well... not so much. i am so disappointed. having nuc 7i3bnk, hdmi 2.1 cable, lg oled65c8 and it simply just flickers as hell. randomly, cannot watch anything, basically my nuc sits in the living room turned off.

thanks

[Leonardo_C_Intel]

Hello MMark43 Thank you for posting in the Intel Community. I recommend creating a new thread to isolate your case and system configuration, please make sure you add the information of the system model and specs, detail information of the problem that you are having, plus all the information that you have added to this thread, so we can get more information about the problem. Please share with us the information requested on the following link: https://forums.intel.com/s/feed/0D50P0000490AGdSAM Thank you; hope to hear from you soon. Regards, Leonardo C. Intel Customer Support Technician Under Contract to Intel Corporation

[FMacF]

LeoC, I could try the device with wired connections, but what would be the point? The device isn't a very viable HTPC if you have to use a wired keyboard and mouse. I have 4K 60hz Dell monitors I could test the screen on... but again, what's the point? It needs to work on my TV the way it's advertised to. Unless Intel is aware of a specific conflict with their device and LG's TV panels and just aren't reporting it, it seems like a pointless endeavour. 3 months on from this post, and over 2 years since the last firmware update in Jan 2017... and still nothing to fix this known issue. I've contacted the retailer I purchased from and they've told me that they won't accept a warranty claim because the device functions, regardless of the issue 60Hz/4K res. The only other avenue would be sending it back to Intel directly, but I've read some of the posts from other people about that experience, and I don't have time for that only to be told they can't replicate the fault.

So i've pretty much given up at this point... i just run the thing at 30Hz refresh. Seems to work OK for the most part (just occasional sound glitches), but it's obviously not what I bought the thing for.

Will never buy another Intel product again, that's for sure.

[Leonardo_C_Intel]

Hello FMacF Regarding to the Intel NUC working with your TV, we have not validated your model so we cannot comment either way if it is compatible. From our side, we recommend the following: 1. Install the latest BIOS 2. Update Windows with the latest updates for the installed version 3. Install the latest Intel® HD Graphics Driver. You should be using version 6286. a. Note: If using Windows 10, you have build version 1709-RS3 or later installed with the latest Windows updates. b. https://downloadcenter.intel.com/download/28208/Intel-HD-Graphics-Driver-for-Windows-10-for-Intel-NU... 4. Use a straight-through cable, no adapters (it appears your TV only supports HDMI) 5. Test the unit without any input devices except for mouse and keyboard. 6. If you are still having issues, we recommend contacting Intel Customer Support directly for your region: a. https://www.intel.com/content/www/us/en/support/contact-support.html Hope this helps. Regards, Leonardo C. Intel Customer Support Technician Under Contract to Intel Corporation

[MMark43]

Hey guys, i was frustrated as i had this issue as well. what was suggested to me was to try out one of the cables that are compliant with this: https://www.hdmi.org/manufacturer/premiumcable/faq.aspx i did try it and it solved my issue, to my very huge surprise.... i have this cable: https://www.club-3d.com/en/detail/2335/premium_high_speed_hdmi_2.0_4k60hz_uhd_cable_1m-3.28ft/ hope it helps & best of luck. michal [https://www.club-3d.com/moodproductfoto/large/2335_2.jpg]<https://www.club-3d.com/en/detail/2335/premium_high_speed_hdmi_2.0_4k60hz_uhd_cable_1m-3.28ft/> Club 3D | Premium High Speed HDMI 2.0 4K60Hz UHD Cable 1m/3.28ft<https://www.club-3d.com/en/detail/2335/premium_high_speed_hdmi_2.0_4k60hz_uhd_cable_1m-3.28ft/> CAC-1311 - Premium High Speed HDMI™ 2.0 4K60Hz UHD Cable 1m/3.28ft The Club 3D Premium High Speed HDMI™ 2.0 4K60Hz UHD Cable enables the connection of your HDMI™ 2.0 supported Gaming PC or Laptop to an (Ultra) High Definition Monitor or other HDMI™ 2.0 supported device. It fully supports the ‘Premium High Speed HDMI™ with Ethernet’ specification, ensuring that video up to 4K UHD ... www.club-3d.com HDMI :: Premium HDMI Cable Certification Program :: FAQs<https://www.hdmi.org/manufacturer/premiumcable/faq.aspx> What is the Premium HDMI Cable Certification Program? The Premium HDMI Cable Certification Program is a new program that encompasses additional and enhanced cable testing as well as a comprehensive anti-counterfeiting label program. www.hdmi.org

[HChou8]

I have the same issue. I have a NUC8i3BEH win10 Pro OS with latest Intel and Win10 updates connecting to LG TV. The blinking happens on LG TV but not on computer monitor. The only solution to fix the problem seem to be unplug both TV and NUC for 30 seconds. Some day, I have to repeat it 2 to 3 times to resolve it. Is it possible that Intel graphic driver is having hand shake problem with LG TV??? Would be nice if I can set the graphic driver for LG TV on boot.