What to do when your TV screen shows No Signal ?

[dbennett_1]

What to do when your TV screen shows no signal.

[mibrnsurg · Accepted solution]

Is it on the right channel/input (video/TV)?  If that's correct, I'd do a hard reboot by unplug/plug in power after 30 seconds.  This will fix many DVR problems, let us know if it worked, good luck.

Chris

[SadathCS]

Hello dbennett, (No Signal) is common when your TV is on the wrong input as mibrnsurg suggested. Also, check the connection between the U-verse receiver and the TV. If a cable was accidentally pulled, it will result in No signal. If you are using a Coax cable between your TV and the U-verse receiver, you may just need to change the channel up or down to restore your picture. I have sent you a private message to provide you further options to resolve this issue in case you are still having trouble.

Use this guide to determine what connection is being used so you can make your input selection on your TV to match the U-verse receiver.

att.com/tvcables

SadathCS

ATTU-verseCare

[John Van]

How do you know what input your TV is supposed to be on?I've been working on this for hours now and getting nowhere!

[my thoughts]

Look at the back of the uverse box for type of wire running to tv input.
Look at back of tv for input number.
Match input with remote to physical connection.

Types of connection
Coax .... input (source) to tv, tv needs to be on channel 3
Red, White, Yellow....input AV (1-?) Old vcr type connection most tvs will have at least two, AV1, AV2
5 way component, red, white for audio, red, green, blue for picture...input shpuld be componet (1-?)
HDMI....thin rectangle set input to HDMI(1-?) Depending on which plugged into.

Hope this helps, older tv probably coax or AV, newer tv likely set up component or hdmi.

[JackieMo]

Happened to me tonight right at very end of a show so of course I missed ending.  Phone and Internet were fine, was just the TV.

Did the check other channels as it says to do, did not reset modem due to other connections as stated above were working fine.

Affected ALL 4 TVs in house and ALL channels.  So was planning to call service when after 6.5 minutes it came back on as if nothing happened.

What causes this?

What causes that stupid Blue screen with the click OK to watch pop up in middle of a show?

I'm afraid there isn't a person at AT&T that will tell us the truth of the blue screen.

[aviewer]

Cofins4Terorists - It is not mysterious. It is exactly what it says - The STB does not detect a signal. It does usually come back in a few minutes, so that should be the first suggestion - wait.

If the broadband light on the RG goes red it is the RG or upstream. Call for remote test to see if it can be repaired or you need a new RG.

If you have COAX to feed the TV, it could be anywhere in the COAX system. Make sure you have compression fittings & the connections are tight. And, no barrel connectors After that you would have to disconnect legs to see if you can find one faulty one

[SRH021]

I'm having this same problem.  It's only with the main DVR receiver though.  Happened right in the middle of viewing.  Checked all connections. Disconnected the DVR, connected a regular receiver - TV/ connections working great. Re-connected DVR - just get the ATT start up (blue) screen cycling, then the "Press OK to Watch On Demand", then it cycles back to the ATT blue screen. All other TV (which are also HDMI connected) with regular receivers working. Could this be a bad DVR receiver? 

[aviewer]

SRH021 - It does sound like the DVR has gone bad - You have service with a different STB on the same connection??

If you try DVR directly connected to a working RG with a short cat5 & it does not work. it must be the DVR. You can try a destructive reboot at that point to see if you can revive it. You will lose your recordings with the reboot - same as with a new DVR. At least you save the wait for a new box.

Do this on the front panel of the DVR itself, not on the remote:

1. Press and hold down the power button.
2. Within 1 second, also press and hold down the OK and down arrow buttons.
3. All 3 front panel lights (red, green, blue will come on). At this point, release the power button, but continue holding down OK and down arrow.
4. When you see a gear appear on the screen, release OK and down arrow.

The system will reload the factory software from the network. This will take 20-30 minutes, and then the system will reboot.

[jrod041990]

I was having this same issue, we had signed up 6 days ago, it took AT&T 5 whole days to even consider the issue after numerous calls and hours spent on the phone with them. It was always "Checked the line, no issue found. Ticket closed." Finally we got a GOOD tech, he checked the coax cables and found out our lines were failing. He replaced all of our coax cable with cat5 cables. No issues for the past 24 hours!

[swaros]

what is the right channel input??  it is on channel 3

[mibrnsurg]

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@swaros wrote:

what is the right channel input??  it is on channel 3

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No it isn't, the coax you're basing the answer on connects different units, not from the TV to the DVR/STB.  In any case the coax was replaced by cat5e cabling, the only thing Uverse techs use nowadays.

Chris
__________________________________________________________

Please NO SD stretch-o-vision or 480 SD HD Channels
Need Help? PM ATT Uverse Care (all service problems)
ATT Customer Care(all other problems)
Your Results May Vary, In My Humble Opinion
I Call It Like I See It, Simply a U-verse user, nothing more

[Anonymous]

I had the same problem.  If you are using HDMI connections some tv's have a handshaking issue with the tv.  That was the problem with my Samsung. It would work for a while and then all of a sudden drop the connection.  I got tired of it and switched to component and have not had a problem since.  You get the same hi def picture with component that you get with HDMI. 

[mibrnsurg]

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@dinglesby wrote:

I had the same problem.  If you are using HDMI connections some tv's have a handshaking issue with the tv.  That was the problem with my Samsung. It would work for a while and then all of a sudden drop the connection.  I got tired of it and switched to component and have not had a problem since.  You get the same hi def picture with component that you get with HDMI. 

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Some users have had to use the 4th of 4 HDMI inputs to get Uverse to work properly.  With this 1225 I have now, I can use HDMI, the 2250 I had b4 had the black crush problem on HDMI.

I could see the difference between HDMI and component here on my Panasonic plasma.  Component gave a slightly 'softer' look to the image, but was fine for full-time use of it w/the 2250.

W/the 1225 I've had for about 2 months or so, I've gotten the 1005 HDMI error 1 time and an off/on of TV and 1225 fixed it.

The 1216 I had originally got HDMI errors only 2 or 3 times in 5 years of use.  2 or 3 times I had the HDMI just fail and give me 'snow' on the TV.  That required a reboot of the DVR to get it back.  During all of these the component connection worked fine.

Chris
__________________________________________________________

Please NO SD stretch-o-vision or 480 SD HD Channels
Need Help? PM ATT Uverse Care (all service problems)
ATT Customer Care(all other problems)
Your Results May Vary, In My Humble Opinion
I Call It Like I See It, Simply a U-verse user, nothing more

[radbear5569]

I have a main box and 3 boxes in my bedrooms, the three boxes went off, they all said no signal so I called and had an ATT rep walk me through the process. He said I needed new dvr's so they sent them to me and I hooked them up the same way and they are doing the same thing. I turn on the box/tv and it comes up saying to push the menu button on the receiver then push the wps button on the main box and wait for them to pair but they dont pair up they keep going back through the same process. I really need a tech to come to my house and help resolve this issue.