Windows 7 PC to TV with HDMI setup.

Hi Windows 7 forum, here's another tricky issue which may not be able to be resolved (like my no sound on another PC?).

I connected an HDMI cable into my PC's HDMI port and connected the other end of the HDMI cable into 3 different TVs (2 with HDMI input, one with an old RCA input connector).

I go to PC\Control Panel\All Control Panel Items\Display\Screen Resolution and the extra display (the TV) is not found. The 3 monitors 1, 2, and 3 are showing however. A 4th should show for the HDMI connected TV I think.

I do have a PC graphics card ATI Radeon HD 5700 Series which allows 3 monitors to work via VGA and DVI connection into the graphics card.

Any hints please let me know.

Thanks in advance.

Ok, I have the 3 monitors back to the correct setup.
I uninstalled adm_catalyst_11.8_preview_driver_july_12.exe and installed what I think is the original graphics card driver 12-1_vista_win7_64_dd_ccc.exe.
The graphics card has all 3 DVI port connected with the 3 monitors and also has the HDMI port connected with the TV HDMI cable.
Windows 7 Control Panel\Display\Change display settings only shows 3 Displays which are the 3 monitors and doesn't find the 4th Display, the TV.

It seems perhaps another AMD driver may be needed. Any ideas please let me know.

As far as i know AMD 5700 series does support multiple monitors as long as they are connected trough a Display port (DP).
Passive DP dont work for more than 2 monitors.

By the way your quite lucky i wish i had 3 monitors :)

Thanks chris1neji. It is nice having 3 monitors. I'd be happy to walk you through how to set it up. It's always a bit of effort doing it the 1st time, but now I know the little tweaks to get it working it's quite smooth sailing. (I bought to monitors at a good price which helped).
The display adaptor was one of the tricks.

I'm sorry, but I don't understand smarteyball's anacronyms?
Are you saying my PC to HDMI won't work?

OK, I have just built a new PC on Windows 7:
1 ATI Radeon HD 5700 Series (1024MB)
2 ATI Radeon HD 5450 (1024MB)

The 1 ATI Radeon HD 5700 Series (1024MB) outputs to 3 monitors on the PC.
I can't get the 2 ATI Radeon HD 5450 (1024MB) to output to a TV each via the HDMI connection?

Not sure if Windows 7 Device Manager recognises the graphics cards as it shows:
IDE ATA/ATAPI controllers
ATA Channel 0
ATA Channel 0
ATA Channel 1
ATA Channel 1
Intel(R) 6 Series/C200 Series Chipset Family 2 port Serial ATA Storage Controller-1C08
Intel(R) 6 Series/C200 Series Chipset Family 4 port Serial ATA Storage Controller-1C00

The Sound, video and game controllers nothing for video, only audio.

Any help please?

Thanks for the reply.
Sorry, I was told by another forum that I should look under Display adapters. The attachment shows the 3 graphics cards are recognised.
I have the latest drivers from the AMD website.