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PC -> HDMI "No Signal" - was working fine earlier

post #1 of 16
Thread Starter 
Hi, I have a problem running dual monitors. Long story short, I have to use a mini-displayport to HDMI adapter, it was working fine earlier with my 2nd monitor, but I then decided id try my hdmi to VGA adapter on the 2nd monitor to see if I can get a little better picture quality. The hdmi to VGA adapter didn't work so I reverted back to the mini-displayport to HDMI.

My problem now is that the mini-displayport to HDMI has for some reason completely stopped working, when it was working fine just 30 minutes ago before I tried the hdmi to VGA. Windows and Catalyst Control Center both detect the 2nd monitor, but it just remains on "No Signal".

Is there any suggestions? I've tried restarting my PC, I've tried every different resolution/refresh rate, I've tried extending the display, I've tried uninstalling the monitors through device manager and reconnecting the cables.

I know the monitor is there, I can drag windows and my cursor to it but it just simply displays as the No Signal blue screen.
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post #2 of 16
Have you tried just simply turning off the monitor and turning it back on?
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post #3 of 16
Thread Starter 
Quote:
Originally Posted by Vagrant Storm View Post

Have you tried just simply turning off the monitor and turning it back on?
Yep.
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post #4 of 16
Have you tried only having the one monitor that isn't displaying attached?
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post #5 of 16
Thread Starter 
Quote:
Originally Posted by Vagrant Storm View Post

Have you tried only having the one monitor that isn't displaying attached?
Not yet, will do that now. I'm just so confused as to why it would be working earlier, then just stop working even with the same setup as when it was previously working.
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post #6 of 16
Quote:
Originally Posted by Chris_483 View Post

Quote:
Originally Posted by Vagrant Storm View Post

Have you tried only having the one monitor that isn't displaying attached?
Not yet, will do that now. I'm just so confused as to why it would be working earlier, then just stop working even with the same setup as when it was previously working.

My guess is that the VGA connection got something set on the monitor that it didn't like and now it doesn't want to change.

You might also want to ensure you set the monitor to factory defaults and such...also manually changed the inputs. It should auto detect this stuff, but some times they don't.


Was it an active VGA to HDMI adapter? Meaning it was powered.
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My System
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CPUMotherboardGraphicsGraphics
2600K @ 4.7GHz Asus P8P67 B3 GTX 580 EVGA Hydro Copper 2 GTX 580 EVGA  
RAMHard DriveOptical DriveOS
4x4GB G.Skill Ripjaws bunch of 'em Blu-Ray For movies Windows 8.1 
MonitorMonitorKeyboardPower
24.4" Hans G HH251 X2 Yamakasi DS270  Blah 1000watt Super Flower 
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post #7 of 16
Thread Starter 
Quote:
Originally Posted by Vagrant Storm View Post

My guess is that the VGA connection got something set on the monitor that it didn't like and now it doesn't want to change.

You might also want to ensure you set the monitor to factory defaults and such...also manually changed the inputs. It should auto detect this stuff, but some times they don't.


Was it an active VGA to HDMI adapter? Meaning it was powered.
Just tried with the 2nd monitor attatched only, no dice.

I tried resetting the TV but unfortunately it's a very obscure TV by an unknown brand, when I reset the settings in the TV menu it just resets like the contrast/brightness etc I don't think it fully factory restores it and I can't find a way to do that online since the TV is so obscure.

Uh not too sure if the HDMI to VGA adapter was active.

If I try replugging the HDMI cable to the 2nd monitor, my main monitor resets/flashes or whatever but I still don't get a signal to the second.
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post #8 of 16
Thread Starter 
At this point I may aswell just invest in a real monitor only, rather than a TV/Monitor combi and use a dual DVI adapter (if such a thing exists? like 2 DVI ports branching from 1 cable since my 7950 only comes with 1 DVI port as standard). Although with my luck with adapters and monitors, if that fails I'm not going to be happy at wasting cash on another monitor which would wind up useless.
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post #9 of 16
Oh...its a TV. I've experienced a lot of craziness with TVs and a mini HDMI adapter too. I even own one that will work via every combination of adapters and inputs...save for the mini-HDMI out put out of my 580s...even other GUPs with a mini HDMI adapter will work fine.

First off, I assume you've checked that the TV isn't looking for a different Input now and that you've tried the HDMI in any and all ports the TV has.

Does the TV have a VGA port? if it does, try hooking up a computer via VGA. Let it see it and be happy and then switch back to HDMI.
Unplug the TV and press the power button a few times and plug it back and try it.
Go into the channel setup and tell it to look for "Cable" (I've seen this actually make a difference once...though I don't know if UK TVs have this setting).
My System
(16 items)
 
  
CPUMotherboardGraphicsGraphics
2600K @ 4.7GHz Asus P8P67 B3 GTX 580 EVGA Hydro Copper 2 GTX 580 EVGA  
RAMHard DriveOptical DriveOS
4x4GB G.Skill Ripjaws bunch of 'em Blu-Ray For movies Windows 8.1 
MonitorMonitorKeyboardPower
24.4" Hans G HH251 X2 Yamakasi DS270  Blah 1000watt Super Flower 
CaseMouseMouse PadAudio
Built into Desk Microsoft SideWinder X8 Comfy one... Creative Extreme Gamer 
  hide details  
Reply
My System
(16 items)
 
  
CPUMotherboardGraphicsGraphics
2600K @ 4.7GHz Asus P8P67 B3 GTX 580 EVGA Hydro Copper 2 GTX 580 EVGA  
RAMHard DriveOptical DriveOS
4x4GB G.Skill Ripjaws bunch of 'em Blu-Ray For movies Windows 8.1 
MonitorMonitorKeyboardPower
24.4" Hans G HH251 X2 Yamakasi DS270  Blah 1000watt Super Flower 
CaseMouseMouse PadAudio
Built into Desk Microsoft SideWinder X8 Comfy one... Creative Extreme Gamer 
  hide details  
Reply
post #10 of 16
Thread Starter 
Quote:
Originally Posted by Vagrant Storm View Post

Oh...its a TV. I've experienced a lot of craziness with TVs and a mini HDMI adapter too. I even own one that will work via every combination of adapters and inputs...save for the mini-HDMI out put out of my 580s...even other GUPs with a mini HDMI adapter will work fine.

First off, I assume you've checked that the TV isn't looking for a different Input now and that you've tried the HDMI in any and all ports the TV has.

Does the TV have a VGA port? if it does, try hooking up a computer via VGA. Let it see it and be happy and then switch back to HDMI.
Unplug the TV and press the power button a few times and plug it back and try it.
Go into the channel setup and tell it to look for "Cable" (I've seen this actually make a difference once...though I don't know if UK TVs have this setting).
Yeah it has a VGA port and luckily I have an older laptop laying around with a VGA port, so I'll try that. I don't think it has the "Cable" thing though. Thank you for your help so far by the way, much appreciated.
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CPUMotherboardGraphicsRAM
AMD FX-8320 Asus M5A78L-M LX-Plus Gigabyte AMD Radeon 7950 4GB 1600 DDR3 
Hard DriveOSMonitorPower
128GB Kingston SSDNow Windows 7 22" Viewsonic 120hz LCD Corsair 750W 
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Logitech MX518 Puretrak Talent 
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(13 items)
 
  
CPUMotherboardGraphicsRAM
AMD FX-8320 Asus M5A78L-M LX-Plus Gigabyte AMD Radeon 7950 4GB 1600 DDR3 
Hard DriveOSMonitorPower
128GB Kingston SSDNow Windows 7 22" Viewsonic 120hz LCD Corsair 750W 
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Logitech MX518 Puretrak Talent 
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