Tearing my hair out now - Dolby Vision on HDMI3 on AF8

[Mchaggis69]

Ok so I had a bit of a nightmare trying to get Dolby Vision up and running on my AF8 TV.

I have a NVidia Shield attached via a Marantz receiver to the TV.

The Shield can output Dolby Vision but I could only get it to work on HDMI 2 input on the TV.

HDMI3 (which is the preferred input due to ARC) was giving me sparkles on screen and picture drop outs.

I even bought a new AV receiver thinking that was the problem.

Anyway - a software upgrade of the TV seemed to fix this and I closed and open ticket I had with Sony.

Tonight - the issue has re-appeared.

Screen is unwatchable using Dolbyvision on HDMI3 - thousands of ‘sparkles’ on screen.

Switch to HDMI 2 and its fine.

I am gutted this has re-appeared as I thought it was resolved. Any clues out there?

Video of whats happening - choose 1080p quality to see it properly https://youtu.be/iM-btPADgHU

[Mchaggis69]

To avoid any references to the AV system potentially being an issue, I’ve now taken that out the loop.

Connected my Shield directly to TV on HDMI3 input = No dolbyvision/flickering etc

Connect my TV directly to HDMI2 input = DolbyVision works fine

Why would this have been working for weeks but now has reverted to how it was before the last software upgrade.

Very frustrating.

[Mchaggis69]

Apologies for another post.

A hard TV reset has brought Dolbyvision back on HDMI3...

Is that a solution? I need to do a hard reset every few weeks to get this TV to work properly?

So its not the HDMI cables, not the AV receiver, not the NVidia Shield, Not HDM2 - but something goes wrong with HDMI3 on this TV if you only put the TV into standby every night when finished using it. Come on Sony, sort it out. A hard reset takes about 3 or 4 minutes before the TV is up and running.

[Joe_Dohn]

Have you checked the HDMI signal format settings (path differs depending on software version, I believe it's under Watching TV - External Inputs - HDMI Signal Format)?

[Mchaggis69]

Yes - all the settings are correct. Its been working for about 10 days since I closed my sony support ticket. I thought the software upgrade had fixed it, but what had actually happened was the hard reset during the software upgrade had sorted things temporarily.

Trust me - this is a sony software/hardware fault.

HDMI2 - no problems at all (but cant use that as need ARC which is only on HDMI3)

HDMI3 - works for a week or two then the interference comes back

Hard reset TV and issue resolves.

Will see if it re-appears in the next week or two of putting the TV into standby every night.

For me theres something the TV is *not* doing properly when you simply bring it out of standby.

[Joe_Dohn]

If it does happen again, try clearing the cached data (under Device Preferences - Storage - Internal Shared Storage - Cached data) then restart by holding Power instead of a full on factory reset.

[Mchaggis69]

Hi Joe,

apologies I wasnt entirely clear.

When I say 'A Hard Reset', what I mean is = Holding the Power Off

I havent been doing factory resets, just hard resets as above. I will look at the cache - but thats a workaround not a fix is it not? I dont want to have to clear the cache on the TV all the time - you shouldn't have to. I will let you know if this works though because the flickering started again last night.

[Joe_Dohn]

@Mchaggis69

Did that solve it for you or are you yet to try it?

- JD

[Mchaggis69]

I’ve done it, but the fact is the actual reset always fixes it temporarily anyway so its hard to say if emptying the cache has had any effect.

My ticket with Sony has been apparently escalated.

The fact the ‘sparkles’ keep coming back in time simply shouldn’t be happening.

[JtR1888]

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