Mine was bricked doing an upgrade to 1.5. It would start and then make a steady tone. If you load the SD card and look in the misc folder there is a more detailed log file. If it says that some wade ices were not found you need to send it in. They got mine back in less than 3 weeks
I had this problem, but I didn't see that file. I was eventually able to get it to update, as you can see from my above posts.