Not an answer, but the same question. My Sony RDR-HX715 is doing the same thing. Waiting for it to complete the recovery process didn't work, it never completes. Unplugging it for a minute also didn't work. Leaving it unplugged for 24 hours as someone suggested (like it was a static discharge issue) also had no effect. Still says Welcome for awhile, then the fan comes on for a second or two, then back to Welcome. It quit flashing recovery for some reason. No buttons respond.
sreed
December 2010