FIOS DVR/STB set to 1080P, occasionally TV will start displaying it in 480P

Have had the same FIOS STB and TV since I moved.. about 8 months ago.

No issues for 7+ months... have had the STB set to 1080p, TV set to 1080p. No changes.

About a week or two ago, I noticed the TV picture was skewed. Saw the TV was displaying in 480p. I checked the FIOS STB... it was still set to 1080p. I changed the STB to 1080i, back to 1080p.. and voila, TV is now broadcasting in 1080p... until it isn't. Upon power up, the issue will return -- but not always.

I've seen some people reference an HDMI handshake issue where one thing (STB/TV) powers on/off before the other. Any idea why this would start recently?

Is the TV on its way out? Is the STB on its way out? Did Verizon change something? Could it be as simple as the remote batteries getting weak, thus causing a slower power on/off for the two devices? I have changed the HDMI cable.. so I suppose changing the remote batteries is next.

Any thoughts?

Accepted answers

jt710

In the end, the issue appears to have been a problematic HDMI port on the TV. After switching ports, I've been free of the problem for several days. Either that, or it is a Verizon problem that they fixed in the same time period.

If this no longer rings true, I'll come back to update. For what it is worth, the TV has exhibited no other issues.

All comments

CRobGauth

What model STB do you have?

Do you turn it off or leave it on all the time?

jt710

STB is VMS1100

Always turn both TV/STB off.

CRobGauth

No reason to turn VMS off.

Try leaving it on.

jt710

I do run analog sound to external speakers.. so it'd be a **bleep** to turn them off seperately as they have no remote support and Verizon removed the secondary power outlet capability from the STB.

Still doesn't explain why this started happening out of the blue.

CRobGauth

What TV manfufacturer do you have?

Have you checked to see if TV has a software update?

Do you only have the VMS or another box as well?

If so, have you swapped them around to see if problem follows?

jt710

@CRobGauth wrote:
What TV manfufacturer do you have?
Have you checked to see if TV has a software update?
Do you only have the VMS or another box as well?
If so, have you swapped them around to see if problem follows?

- Panasonic

- Yes (none)

- Another box, non-VMS though. No issue with it.

- No

CRobGauth

Can you try swapping them around (I assume other box is an IPC)?

Should be the final determination if it is a problem with VMS or interaction with TV.

jt710

I agree, it'd be a very useful troubleshooting tactic.. but one I'd rather prevent, as the issue can sometimes take days to reproduce in addition to the fact that my wife loves the DVR.

The EDID info in the Diagnostics menu shows that the TV is capable of 1080p60 when the issue is currently active.. am unsure whether this eliminates the TV but it makes me feel more strongly it is the box, for better or for worse.

jt710

If this no longer rings true, I'll come back to update. For what it is worth, the TV has exhibited no other issues.