no signal from pc to hdtv

[dngrs]

I have gigabyte 460 gfx card and MSI 770-g45 motherboard. The TV ( LG lcd 32") sees no signal from the pc. I tried using 2 different cables ( minihdmi-hdmi / hdmi-hdmi with minihdmi adaptor with the mini head being for the gfx card). It worked before but I stopped using the TV 3-4 months ago (didnt have time for movies) and recently I tried to watch some and I got no signal. I changed nothing, motherboard drivers are the same but gpu drivers are updated ( I got no idea what version I had before). What could be the problem? Should I send it to the service department?

 

[Maguscreed]

I don't think this is a driver issue, I think it's a desktop expansion issue.

am I correct in assuming you have a monitor plugged into the system as well?

If so the solution is located in the nvidia control panel under display.

I would also set resolution to 720p (1280x720) until you get it working properly.

 

[dngrs]

Yes, a horizon lcd. I never keep both plugged in though. I now tried plugging both in and still there's no signal to the TV. What should I do in that control panel? I tried using that res and still no signal.

 

[Maguscreed]

no signal specifically, or just a blank screen?
Are we certain we have the tv set for the right input?
mine has 6 hdmi's on it, and you have to tell it which one.
Which is confused by the fact they aren't numbered and apparently aren't even sequential.

 

[dngrs]

The TV has a moving text saying "No signal" .
Mine has 2 hdmi inputs and I put it in nr 1 and selected it from the tvs menu. I tried using nr 2 input too.. still not working .

 

[Maguscreed]

The input question still stands as well.

With both hooked up, under display does it even show multiple displays? or just the monitor?

 

[dngrs]

Yes the nvidia control panel shows both.

 

[Maguscreed]

I hope one of the other guru's monitoring this chimes in because I am actually starting to run out of ideas.
You wouldn't happen to have a pdf link to the manual for that tv would you?

 

[Maguscreed]

oh and run into the nvidia control panel under 3d and make sure that it's set to multiple display mode instead of single display performance mode.

 

[dngrs]

It's on multiple display performance mode. Is there a way to see what model the tv is from the control panel here or somewhere? I cant search for the paperwork right now and I dunno what model it is. It only says lg electronics tv

LE: its
LG 32LC51-ZA.AEUYLVG

 

[Maguscreed]

Should have a 'metalish' looking sticker on the back with serial and model info on it.

 

[dngrs]

Yeah I looked and its
lg 32LC51

 

[dngrs]

eng.pdf download - 2shared
here is the manual

 

[Maguscreed]

Well it is a 720p tv so that resolution I gave you up above is the highest it will ever be able to display.

Outside of that I see no specific information regarding problems with that model and pc's.

 

[dngrs]

It worked when I had the pc set to 1680x1050 too.

 

[Maguscreed]

well you should be able to run two resolutions so long as you are not set to 'duplicate'
I'm out of ideas on this one though as you tried multiple cabling solutions before you even came here.
I will be honest with you when I hooked up my lcd tv to my gtx580 it was instant, and when I added a monitor that took all of 10 seconds to set up.

I can't for the life of me imagine why you are having so much trouble getting the tv to accept the signal.

 

[dngrs]

I dunno. It worked fine before :|. I'll send it to service as I got no idea what else to do.

 

[MagusMagnus]

Have you checked the TV's HDMI port for dust? It accumulates pretty quick when the ports are left empty for a period of time, so I'd do that first and if you see it in there, blow it out with a can of air or a compressor if you have one (be sure to not let any liquid spit out first, it's happened to me before so just test it). You'd be amazed what just a tiny little fleck can do. Think back to those Nintendo cartridge games, eh?

However, since you say nothing else has changed other than the GPU driver, that's probably it right there. See if you can't roll that driver back to the previous version in Device Manager or else restore your system with Windows Restore to the point BEFORE your GPU driver was changed. Failing that, I don't know.

I use an external monitor on my mobile computer and it recognizes the connection within 5 seconds (albeit I have to press fn+F5 for it to switch over the first time, then mess with the CCC settings).

Also another thing you could explore for possible physical problems with the TV or graphics card, is to try a DVI/VGA connection if your GPU/TV supports either of those.

 

[dngrs]

It's weird that the pc does see the connection to the tv. In the nvidia control panel, it sees hdcp connection with the LG and in the "set up digital audio" it also sees the tv in the hdmi bar there.
I don't remember what driver I had last time it worked.

 

[dngrs]

I notice there are sparks ( a couple of sparks around the hdmi port and I hear nothing) when I connect the cable to the pc. What does this mean? I suppose it's bad news