Now I tried resrtting my PS3 my holding the power button. It displays now. It askes me stuff about optimal settings then it goes blank and flashes for awhile. I go to display settings to the screen where it has checkboxes for 480p, 720p, 1080p. When I check all of them and press X, my screen goes blank and sparkles again.
I plugged my PS3 slimm to my Toshiba HDTV. It switched the audio/video output from composite to HDMI. It displayed that it is using 1080p but when I moved to the next page after the video details. My screen became blank and showed weird sparkles and flashes. Now I can't figure out how to fix my PS3 display. I've tried both composite and HDMI outputs. Composite is blank and HDMI input has sparkles. Is there a way to make the PS3 recognize HDMI again like resetting it?

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