From a previous thread... The problem is that whenever I plug my PC into one of the HDMI sockets the TV signal deteriorates significantly to the point where it renders watching TV impossible. I'm sure that it isn't a coincidence as I've plugged and unplugged the HDMI cable many times and the TV signal always deteriorates and when it is plugged in and recovers as soon as I unplug the cable. It happens no matter what HDMI socket I use on the TV but doesn't happen if I use the PC input. From me... Hi, I am getting exactly the same problem; I only discovered it by chance. With the signal strength meter displayed on the screen I played around with all the cables and each time I pulled out the HDMI cable from my PC then the signal returns to a constant strong level. With the HDMI cable plugged in the signal is fluctuating up and down all the time causing the picture to constantly break up every few seconds. If I swap the HDMI cable from my PC to the TV with a 15 pin D-Sub cable the problem instantly disappears. However, the crispness of the picture quality has now also disappeared (as the D-Sub uses an analogue signal rather than the HDMI's digital signal). Any help on resolving this issue would be gratefully received.