Looks to be a bad HDMI cable or incompatible settings with the TV (since the Oreo update)
Try hooking up the box to another TV or change the cable or HDMI input
no
i dont have those, seems like some kind of interference
Reseat your HDMI cable on both ends, if that doesn't fix it, swap out a new cable to test the end result.
If that doesn't fix it, it's the TV itself; a board or port going bad.
Does it happen during video playback or only menu?
what firmware build are you running.
try flashing latest bugfix build which is available in this reddit
build 2179
Do you have another TV or monitor you can test it on?
Not normal - I would try a different hdmi cable like others are saying.
try it on another tv or monitor.. to identify where the issue lies.
Definitely bad HDMI cable dude
Change the resolution manually to 1080p, if that doesn't work, replace the HDMI cable. Even so much as a color depth change can cause artifacting with a finnicky HDMI cable
It's a bad HDMI cable. Like many others have said, go buy a new one.
I made this same mistake for close to a month, thinking my Shield TV or my TV was dying. Swapped it with another device and it's been running strong for close to a year.
My symptoms started off the exact same as yours. Next step will be video totally cutting out.
Mine shows a strange resolutions and the screen is flickering for about 10 second (using a projector) It's not a HDMI cable problem because it's working fine with Apple TV 4. MIBOX3 Android 8 Oreo.
Do you have one of those LCD Plasmas? Did you try using any other media to see if the dots still appear?
I am late late late to this... I had the same thing happening when I got my PS4 Pro, I'd have those white dots. It had to do with the HDR settings on the PS4 clashing w/ my TV.
This is probably a 2 on the Helpfulness scale, but it should give you a direction to venture toward.
It's "pixelation" badumtish. Thank you... I'm here all week.
Is your TV a DLP? If so, could be a DMD chip... They can look like that when going bad.
Could be a bad HDMI cable, typical symptoms. Try another cable.