From RGB to HDMI.

kalvindeane

kalvindeane

kalvindeane

Associate
Joined
13 Jan 2010
Posts
2,032
Location
A box in the Astral Plane
My dog broke my headphones a few days ago, and I don't have any speakers. So I've bought a HDMI cable rather than an RBG, so I can use my tv as the monitor and get sound at the same time. Got the lead yesterday, and the screen kept flashing on and off.

Started messing around with my display settings and managed to get it to stay on normally. Apart from when I'm in a full-screen game, in which case it flickers on and off again (and I get funny colours all over my tv). If I put a game to windowed mode, it still does it, if I set the game to windowed mode with no border than everything is fine.

Switched computer on today and I'm not getting any sound off it either lol. I don't have a clue what I'm doing tbh and help would be appreciated. Using 2x Sapphire 5770's in crossfire. Not tried using just one card, though I doubt crossfire is the problem? Even if it is, I need my second card working!
 
Restarted computer and sound is working, restarded a second time and it's not working :s
*edit* Restared once more and sound is working, but each time I try to play games my screen goes on and off and gets lots of weird colours, and when you can see the game properly there are lots of white pixels everywhere.

Using an LG 32LH3000 for the monitor, and I have been for a long time. Still works fine with an RGB cable. Gonna take one card out and try it whilst waiting for a reply.
 
Last edited:
Check that aspect ratio on from pc matches that of the tv. Also, although not identical symptoms, I had a problem with slightly blurred picture (sort of out of focus looking) when I connected my pc to my tv via hdmi lead. It was previously ok using the dvi lead though. Answer was to modify the source selected on the tv. EG, when using a pc to tv through hdmi, I had to go to the input source menu on my Samsung tv and tell it that the hdmi lead was carrying a pc signal. I've not explained myself clearly but if you look at input settings on your tv you may see what I mean.
 
How do I find out my aspect ratio? I've checked on my TV's menu and it's 16:9, but I don't know how to check that it is the same on the pc?

*edit* Changed the input label to pc which seems to have stopped the screen going blank/pixelating. Still no sound though.
 
Last edited:
Make sure the display resolution is to set to 1920x1080 to match your TV.

In the control panel set ATI audio as the default audio device.
 
Last edited:
I sometimes find that I have to wiggle my HDMI at the rear of my PC if the Sound option is greyed out in the Sound control panel applet. When greyed video goes through without issue but sound must be on the edge of the connector or something.
 
Surveyor said:
Make sure the display resolution is to set to 1920x1080 to match your TV.

In the control panel set ATI audio as the default audio device.
Click to expand...

^ this.

Right click on volume control, go to playback devices, you might see some options in there worth trying.
 
Thanks. Neither of my graphics cards are working with hdmi now. They both keep flashing up weird colours, and it makes it impossible to change any settings as I can't see what I'm doing :(

Now one of them doesn't give anything at all. I don't have another HDMI lead so I can't tell whether it's just the cable. TV says "Invalid Format" on one of the cards when using the HDMI cable. Going to re-try the other one. All this fuss over a silly cable! Restarted computer with the same card installed, and put the cable into a different HDMI port on the TV. Worked fine until after I logged in to windows. Says "Invalid Format" again. Really annoying!
 
Last edited:
Afraid not, and no other computer to try with. Using an RGB works fine on either card. Could be the cable. Or the cards. Or the TV. Lol. Not getting anything at all now. I literally don't have a bean left on me so I can't even go to town to buy a new cable to try it.
 
Last edited:
Unlikely to be two gpus at fault. Molded leads are usually very reliable. Socket on the tv? Hmmm. But my guess is it's settings on tv, pc or both which need altered. Other than experimenting, I don't know what to suggest. Maybe Googling will help.
 
Sounds like your main display maybe switching to extended desktop & thinking you may be using dual monitors
If you get a display during bootup try safemode & remove display drivers then re-install them, might be worth a try
 
Been using it with RBG now. Just put HDMI back in, and it's working fine, sound included! I think I might know why, and I know I'll sound like a right tool saying this... I just realised that the HDMI lead can't go all the way in to my graphics card, there's a couple of mm gap, because of there is a strip of metal above the HDMI port on the computer that seperates the PCIE lanes from each other.

I feel like such a dufus.
 
kalvindeane said:
Been using it with RBG now. Just put HDMI back in, and it's working fine, sound included! I think I might know why, and I know I'll sound like a right tool saying this... I just realised that the HDMI lead can't go all the way in to my graphics card, there's a couple of mm gap, because of there is a strip of metal above the HDMI port on the computer that seperates the PCIE lanes from each other.

I feel like such a dufus.
Click to expand...

Glad it's working. I've done worse than that in the past. :D
 
Ah balls. I'm still getting a few white pixels, and sound has gone very crackely. It wasn't because of the PCIE bit, took graphics card out to check that the cable wouldn't go any further in, and it won't. I'm going to try what UFX said. Not sure what display drivers you mean though. Would they be drivers specific to this TV, or do you mean the ATI drivers? I don't know what I'm looking for really. This thread proves that I should never build computers ever again. I can't even plug in a cable properly :D
 
that sounds like a cable issue to me. how long is it and how much was it? sparklies, flashing colours and the picture dropping are all signs of a bad/damaged hdmi cable.


what happens if you drop the resolution to 720p?
 
Last edited:
Booted computer into safe mod atm. Picture is fine (a little bit underscaled but I think that's due to ccc not being on). No sound, I'm assuming that safe mode is the reason behind this. The resolution has also been changed to 1400x1050 automatically. Going to reboot computer and run Windows normally and try lowering the res, tbh the thought never occured to me before lol.

This is the cable I bought, though it's 150cm and not 200 as listed in the description:

http://www.overclockers.co.uk/showproduct.php?prodid=CB-039-OK&groupid=1929&catid=1753&subcat=
 
You must log in or register to reply here.
Back
Top Bottom