Windows 7 detects no connection HDMI PC to TV

I have an Acer Aspire M5100 PC upgraded to Windows 7 not so long ago and a Plasma LG 50PG60. I can't seem to get Windows to recognize the TV or HDMI cable. Acer sent me very explicit instructions, and obviously, everything should be good. The HDMI channel, all I get from the TV is 'no signal '. Have you tried running, then with TV and PC connection on TV is not just marked off the coast, but even unplugged and then restarting PC first then TV or PC. Nothing is running Windows to recognize the HDMI to TV connection.

Help, please.

Microsoft only provides the base operating system. Hardware and drivers are the responsibility of their manufacturers or suppliers.

If there are problems with the hardware and drivers, their manufacturers and/or suppliers - not Microsoft - is responsible for their resolution.

Cables

See http://en.wikipedia.org/wiki/HDMI#Cables.

Are you sure that your cable is good, good condition and with endings correctly connected to the cable?

Radeon HD 2400 Pro

Reported problems with HDMI and this specific map.

What is the solution to help http://www.tomshardware.co.uk/forum/258253-15-radeon-2400-hdmi-problems ?

You have installed the latest driver Catalyst of http://sites.amd.com/us/game/downloads/Pages/downloads.aspx?

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