I also have a HTC 8X (tmobile) with no screen image. If I press just right on the back lower corner it will come on, but it makes operating it a 3 handed ordeal. Something about a monkey and a football...Did the soft reset, hard reset...seems like some sort of short circuit. I heated for a while with a hair dryer ( like you would to remove the back ), hoping to re- glue some loose part inside. worked a little, but didn't last. Contacted HTC via chat, and I'm about 6 weeks past warranty. I can probably get the same phone second hand for what it costs to repair... Trying to decide on my next windows phone but don't like the idea of spending $600. Loving the new icon but tmobile offers few choices