Seagate Barracuda 7200.11 disk will not spin up

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I own a Seagate Barracuda 7200.11 disk, 1,5TB, firmware SD37. I bought it in april 2009, it have been used for backup.
The disk have only been running for 100-200 hours.
I´ve seen some times, that there was a strange clicksound from the disk, during that it was not possible to access the disk. I removed the disk from my computer, stopped and started it again, at it worked ok. The dealer wouldn´t return it, he tested it, and claimed that it was ok. But this error was intermittent.
Now there is a much more serious error: The motor will not start at all. There is a typical startup sound from the disk, it sounds surely like the spindle is locked in some way.
Last time I used the disk it was working ok. I haven´t dropped it on the floor etc.
I´ve bought a new disk, and changed the circuit board. It didn´t help at all. Any sugestions on how to make the spindle start up?

[harddrivespecialist]

There is no other way, but to take it to Data Recovery company.

[pcimage]

PCB's are UNIQUE on these drives.

What happened when you put the other PCB on? Did it spin up and click, or just make the "trying to spin up" noises?