Thread: Black screen flicker when pc is connected to LCD with HDMI cable

I have a very irritating trouble. I have lately bought a 42 inch Phillips LCD model pfl5604. I wanted to connect it to my pc so I can enjoy the full HD features of the TV. I connected my Lenovo sl400 laptop to the TV using HDMI cable and after a while, the screen went black for a second and the picture got back to normal. It happened over and over again. I though that the problem is with the Intel 4500 graphic card, that maybe it was to weak to control the 1920/1080 resolution so I purchased a graphic card, sapphire ATI Radeon HD 4550 512 MB with HDMI connection. I plugged the card to my laptop as well as attached my TV to the graphic card but the trouble was still there. I went back to the store as well as exchanged the graphic card to a Gigabyte ATI RADEON 4650 1 GB card and still the screen went black for a second over and over again. I took my laptop to my brother to check with his 52 inch full HD Phillips TV and there was no problem, no black screens what so ever.

I have Xbox 360 with HD cable box attached to the TV with no difficulty at all. I tried with exceptional cables, all leading to the same result. The funny thing is that I attached my TV with a DVI to HDMI cable, and the trouble was gone, no black screens. I spoke with the Philips support in England, and they couldn’t have an answer for me. I thought maybe the problem is with HDPC, but when I checked on the 52 inch Phillips TV of my brother, there was nothing wrong.
Anyone knows what's the problem?

Did you attempt several resolutions, or only 1920x1080? possibly the refresh rate is incorrect, try messing with those resolution as well as refresh rate settings and see if it clears up.

when HDCP fails on TVs in my lab, they don't sync up at all - they are black the whole time, not picture-black-picture-black etc.

I know you actually desire to make use of HDMI, but consider VGA, the specs for your TV indicate it has a VGA port, with an connected audio port(red white). Some TVs have superior quality when hooking up a PC this way, even though it’s analog.