No signal on Tuner 1

[Dnamertz]

One of my tuners has not been getting a signal all day. I get a message saying "Searching for signal on: Satellite in 1". I did a restart and it it fixed the problem temporarily...both tuners were working fine for about two minutes, then tuner 1 went out again. Any idea what could be causing this?

[litzdog911]

Try swapping the two satellite cables on the back of the DVR. Let us know if the problem moves to Tuner 2 or stays with Tuner 1.

[Dnamertz]

Try swapping the two satellite cables on the back of the DVR. Let us know if the problem moves to Tuner 2 or stays with Tuner 1.

I tried the Restart a 2nd time and its now working fine. If it happens again, I'll try swapping the cables and let you know.

[urkel-Os]

One of my tuners has not been getting a signal all day. I get a message saying "Searching for signal on: Satellite in 1". I did a restart and it it fixed the problem temporarily...both tuners were working fine for about two minutes, then tuner 1 went out again. Any idea what could be causing this?

Really strange -- this also just happened to my Hughes DVR80, except it was on tuner #2. Don't know when it started, but noticed the problem last night. Checked connections and didn't find anything obvious, so I decided to restart, which seems to have fixed everything for now. Anyone know why this happens? I hate doing a restart just to see if that fixes the problem without knowing why. I've had the DVR80 for just over two years with no other problems to this point.

Edit: Just saw that transponders 23, 25 and 29 are showing no signal on the 119 satellite.

[John T Smith]

See if these previous discussions help...
Tuner 2 Problem MAY be due to S-Video Cable
http://www.tivocommunity.com/tivo-vb/showthread.php?t=318681
http://www.tivocommunity.com/tivo-vb/showthread.php?t=333631

[rlsabin]

I had this issue on two of my receivers in the same day. One on tuner one and the
other on tuner 2. I went into the signal strength test and swapped the cables, the
problem remained on the same tuner. Multiple reboots later and both of the tuners
decided to work on both of the receivers. I have a third receiver that showed no
signs of a problem

[chuckg]

I had this issue on two of my receivers in the same day. One on tuner one and the
other on tuner 2. I went into the signal strength test and swapped the cables, the
problem remained on the same tuner. Multiple reboots later and both of the tuners
decided to work on both of the receivers. I have a third receiver that showed no
signs of a problem

Too bad we don't know which model(S) your receivers are.

The Tuner 2/S-video problem is most likely related to a problem on the main circuit board. At least on receivers where the S-video output is adjacent to the Tuner 2 input circuitry.

But if Tuner 1 is involved and reboots temporarily cure the problem as it apparently also did on your Tuner 2 on a different receiver then it most likely is a software problem.

I shan't define software here. Interpret it very broadly to include everything stored in firmware, if there is any, and on the hard drive.

On my receivers a digital control message is sent via an IsquaredC bus to two LNBS21BD ICs which in turn generate the voltages that activate the LNBs and control the polarization via the Tuner 1 and Tuner 2 coaxes.

Because DirecTv can control which channels the receivers are tuned to via software as can the remote control but in each case via the LNBS21BDs to supply LNB voltage source and polarization selection (the actual channel selected from the IF stream from the LNB is via a digitally controlled, probably the same IsquaredC bus, direct conversion receiver chip) it follows that if the software gets confused and tells the LNBS21BD on Tuner 1 to turn off LNB 1 when it shouldn't then rebooting may solve the problem.

DirecTivos have taken on Windows-like behaviour. :down::down::down:
Something I left behind in 1993.

[Dkerr24]

DirecTivos have taken on Windows-like behaviour. :down::down::down:
Something I left behind in 1993.

What behavior is that? Works on 95% of the PC's on the planet and has the majority of the software titles written for it? :)

I can't remember the last time I had any O/S related problems with Windows since XP SP2 came out, 3 years ago.

[Marrelli]

My Tivo is also not getting the signal on sat 1 for the channels on transponder 16. When I do a signal test for that transponder, it shows 0 & 95%. Also 60 & 93 for tran. 15. All others are normal. I will try a reboot to see if it clears it up. Strange that others are having same prob. I have a Samsung S4040R.

I switched the cables to the 2 tuners, and then I had the same problem with tuner 2. So, my problem seems to be with the cable.
After moving some other cables around that come close them, it now works. Hopefully it was just interference from another wire.

[chuckg]

What behavior is that? Works on 95% of the PC's on the planet and has the majority of the software titles written for it? :)

I can't remember the last time I had any O/S related problems with Windows since XP SP2 came out, 3 years ago.

Funny, versions of Windows existed before XP SP2.

[urkel-Os]

Well, didn't do a complete diagnostic on my tuner problem, but everything was fine after making the change from S-Video to composite out. I'm bummed about having to hook it up like this, but I honestly don't notice a difference on the HDTV anyhow.