My ps3 has its hdmi cord hooked in but it wont show on the hdmi screen

You must have to make setting in your ps3 and Display device. Set the display device at auto option for input source. It may be set at VGA. that why you get output of VGA but it does not display output from ps3

How are you hooking it up to your TV, through the AV color cords or HDMI, or HD AV cords?

Did you hook it with HDMI or analog? My plasma was on the fritz but when i hooked it up analog it worked..ugly though compared to 1080P. Try a different HDMI cord as well

Hook up a/v cord and have it on standy (red light)...push and hold power button for about 7-10 seconds or until you hear it beep......Let off...wait another 5-10 seconds.....is it on now????? if not your audio/video card in it might have went out....

I had the same problem, stuck in a hotel room for 2 days. When I held down the button, next time I turned it on, I got the same prompt with using HDMI output, said yes, and screen went black. However, a screen then came up asking if I could see the image or not, but it has a 30 second time limit before it saves those setting, you have to click "No" on this screen, and it will drop the resolution to 780p instead of 1080 and it should work! Make sure you're paying attention so you don't miss the screen!

unplug the controller and take a pin and press the small button on the back of the controller to reset. i also had this problem with mine.

unhook the hdmi and try again and by the way you still need the original plugs in as well hdmi is a booster not the whole thing

Hi:
Check the video connector on the PS3 for a switch to switch from composit video to HD video.

Make sure everything is pluged in correctly and the Playstation 3 is on stand-by. The using the power button on the console hold it for about 5 seconds till you hear two beeps. And this will reset the display settings.

Don't hold it to long or it will go on stand-by.

Also try reversing the ends of the HDMI

what you have to to is hold the start button till the TV shows 480i then you will have what you need, it will set up for your tv