My playstation 3 will not play in 1080p. It used to work, but when we switched cables, it wont work in HD.

You must make sure your playstation and your TV set are both set for the same video format (1080p, 1080i, 720p, etc.).

You can either go through all your HDTV formats until it synchs up (give each a good 20 seconds or so before moving on), or you can open the display menu for your PS/3 using a different video connection to your set (i.e. composite), setting both to match, then switching them to HDMI.

Hello there. There's a few possibilities. First, the obvious, do you have it set to 1080P in the Display Settings options? Secondly, are you using an HDMI cable? You need to be using HDMI to play games in full 1080P. I use the component cables (The red, green and blue ones) for my PS3 and when I'm on the XMB (that's the PS's desktop so to speak) it's displayed in 1080P but games will not play in 1080P, only 720P. Any old HDMI cable will do the trick, so don't get suckered by the price if you are going to pick up a cable!

whats the p rating on your tv

1080p mode is HD mode and the ps3 must have a HDMI cable connected to the ps3 and tv for those graphics to take affect

I believe a PS3 needs a special cord for connection to an HD tv.

Hd tv only has 720p picture ability
bluray xbox playstation 3 needs a hdmi cable connected to enable 1080p

Try video settings on the playstation 3. Adjust it to reflect hdmi.

if you have a full hdtv then providing you set the playstation up in the settings menu to 1080p and use a hdmi cable then everything you play will be in hd (except ps1 and 2 games) but you can select to upscale these. all blu rays and ps3 games will be in full hd.

im not sure,but i think you have to use hdmi cables to view in 1080p

You most likely have the updated drivers. You may have to go and change a setting. I found an answer on the PS3 website that may be of some use to you. I hope this helps you: http://boardsus.playstation.com/playstation/board/message?board.id=ps3&message.id=1662191 From the site: "go to bd/dvd setting and set the "108024hz" option off"