Very easily fixed, Eric. Put the HDMI cable back in and have the PS3 on standby. Now, hold down the power button until you hear several beeps (should only take a few seconds). This resets the PS3's video output settings to whatever you have connected at the time.
Once you get things back i would suggest going into your PS3's video settings and select everything for video output except 1080p. The fact your tv went black on this has me thinking your tv does not have this as a native resolution- it may upscale but cannot take it as an input.