Secondary display (TV) not recognized

[captaingorope]

For quite some time, I have been trying to fix an issue: Can't connect my Tv as a secondary display....
5 months ago everything worked just fine! I want to use the TV as a duplicated screen.
Whenever i try to connect the HDMI cable, my PC doesn't even mention that anything was connected or moved! (can't try any other cable than HDMI)
Things i have tried so far:
1- Using different HDMI cable. (all 3 worked)
2- Checking if the HDMI port on my GPU is broken (it isn't. used one of the HDMI to connect my primary monitor to the PC)

3- Downloading drivers ( tried all sorts of drivers- new and old)

4- Going through system settings (Didn't find anything)

System spec:

CPU           I5-4690k (40%OC)
GPU           AMD R9 290 (windforce edition)

MOBO        GA-Z97-HD3

Monitor      Benq GL2750
TV              Can't get the exact model, but it's something like this: Philips Cineos 52PFL9632D

Nothing works... In the name of Gaben, please help!!!

[parallax7]

Have you tried changing the resolution of your attached TV? Try going to 720p and see if you can get a stable image from your PC to display on the TV.

[captaingorope]

I tried it and it didn't help.. My pc doesn't recognize the HDMI display, but ONLY for the TV

[techguru]

I tried it and it didn't help.. My pc doesn't recognize the HDMI display, but ONLY for the TV

does the tv see that something is plugged into the hdmi?

[parallax7]

Here's another idea, do you have or can you burn a Linux Live CD/DVD/USB? If so, boot into Linux and see if you can get your TV to show up as secondary display. This is quite a big step, but it may help to diagnose whether this is a Windows problem, or something else.

[captaingorope]

does the tv see that something is plugged into the hdmi?

Yes, it does.

[captaingorope]

Here's another idea, do you have or can you burn a Linux Live CD/DVD/USB? If so, boot into Linux and see if you can get your TV to show up as secondary display. This is quite a big step, but it may help to diagnose whether this is a Windows problem, or something else.

Going to try it out today, downloading the files right now

[captaingorope]

Hey, finally I tried out Linux Live. And it didn't work. It didn't show the secondary display.

[parallax7]

Okay, if it didn't work with Linux then it's likely a more general problem. Could you attach another monitor/TV to the same HDMI port to see if you get any output, whilst your original monitor is connected as normal? I would do this to see whether there is perhaps a problem with the TV, or if the problem really lies with your PC.