mini dvi to HDMI no longer working to t.v.

Goodness, I hope not! Try it in a new user account: http://docs.info.apple.com/article.html?path=Mac/10.6/en/8235.html

And try to reset your PRAM http://docs.info.apple.com/article.html?path=Mac/10.6/en/26871.html

and SMC http://support.apple.com/kb/HT3964 .

Also, you could bring your mac to a TV store and ask to try it on one of theirs to eliminate an issue with your TV itself.

I don't know if this will even work, but try booting your mac off the Install DVD (put disc in, shutdown, restart holding C ) and then connecting the display- if your mac sleeps under these conditions, I would think it'd be a hardware issue for sure, but hopefully not with your Mac!

Message was edited by: Girl.luvzer.Mac

Before doing any software things, first make sure it's not the cable/connector. HDMI connectors sometimes go bad. Also, your MBP isn't going to sleep, the video to your MBP is being turned off.

I'm guessing either your TV isn't set up right (trust me, kids/wives/friends/dogs have been known to mess up TV settings) or the cable is broken. If not that, then I'd go with the suggestion of trying it at an Apple Store.

Then do the software stuff.

was wondering if you solved your problem, as I have the identical one. I have been using a generic mini-dvi to hdmi dongle plus a HDMI cable to connect my white intel imac to my television. It has worked great and flawlessly until very recently. Now the TV says "no signal". Nothing was changed in my setup. I have tested the mini-dvi port with another dongle, tried a new minidvi-hdmi dongle, tested the HDMI cable, and tested other ports on the TV, as well as resetting the TV to defaults. Still nt working.
At this point, I was assuming it was a software problem, even though starting from a restore disk or in safe mode did not solve this. Your conclusion about a software update is intriguing, because the timing would match for me too. If you come to a solution, could you please post it here? Thanks.

I'm having similar problems. I have a Toshiba Regza 1080p HDTV and frustrated that I cannot get my audio and video to work selecting one INPUT source on the TV. I used to stream Netflix with the minidiv and a separate mini stereo cable and it worked! until I moved and voila it stopped working. Grrrrr. I switched to a mini stereo y cable when a technician told me perhaps my audio cable was bad. Tried every combination of display setting on my Macbook Pro (OSX 10.5.8) and I'm stumped. Little to no sound setting on my MBP as some forums advise that I select an HDMI output. BL: My MBP sends audio out (thru HD Colorstream 1 audio input) and video using minidvi-HDMI to Toshiba's HMDI 1 (tried HDMI 2; etc.) Nothing works. Since only one input may be selected thru the HDTV at any given time I cannot figure out what I need to do the get the audio from Colorstream HD1 and HDMI video to synchronize. I just read about the Mini DisplayPort to HDMI Adapter Pro w/Optical Audio cable and wondering if that will push my audio from MBP and video to the Toshiba HDMI port thus allowing me to select one input source on my Toshiba 1080p HDTV and perhaps being a solution? Before I go out and buy this I need some help from you smart folks. Thank you!