i kept my phone ovcer DOA deadline mainly to report reboots and wait for sw fix. lost my faith bit too early.
no it wasn't dead. just frequent reboots that most probably would have stopped with the patch...
look the first bugzilla link at my signature, there you can find the method to apply the patch which is echoing zero to a file to stop the device from going to deepest sleep.
This same happened to me. I got a DOA device with a broken screen, sent it to the repairs. They promised it'd take 2 weeks. Well, after 2 weeks I went to the verkkokauppa customer service and demanded a refund. Well they then decided to send me a replacement. So here am I typing with my replacement N900.