Magic Trackpad reboot?

Question

Hi everyone,
Yesterday my Magic Trackpad is gone. Suddenly.
No scolling response at all, the device is connected, batteries OK, THE PHYSICAL CLICK WORKS, but the pad itself is gone.
Changed batteries, restarted my Mac several times, no way to wake it up.
Before bringing it back for repair, I'm asking something I wasn't able to find anywhere: is there a way, some procedure, to restart/reboot my Magic Trackpad and fix this issue?
Thank you all
Riccardo
PS: Thank you Steve, looking forward for your comeback. Come on!

Answer 1

My instructions in that post said "Keep the first 4 checkboxes checked".  I never said check the remaining boxes.  And as it turns out, the fifth box is "Force Setup Assistant to runs again on restart".  That's why you are being prompted to reenter all your setup config information! The file named /var/db/.AppleSetupDone was deleted which causes that behavior (it says that too for that checkbox).
Don't you have any backups of your boot system?  If you did you could try copying the .AppleSetupDone file from the backup.   Somehow you need to get /var/db/.AppleSetupDone recreated.  You say your original account is there.  So there is hope and maybe only getting a new .AppleSetupDone is what's required.
There's a number of ways to approach this.  But describing them clearly I suspect is going to loose something in the translation (if my simple BT reset is any example).  So what I suggest before you do anything further, if you don't have any backups, back up that disk.  Even if it means going out and buying an external enclosure with a disk.  At least you'll then be able to do future backups if you ever get yourself out of this mess.
Assuming you have your disk backed up, reboot and go through the setup process but create a different account (i.e., different name from your original account).  I'm assuming (hoping really since I'm playing this by ear making it up as I go along) that your /Users will have two accounts showing; the original and the new one created by the new config/setup process.
I am assuming at this point you are logged into the newly created account.  If you go into the Accounts preference pane I don't know if it will show both the new and old accounts or just the new account. 
Click the lock in the lower left corner and enter your admin password.
Click the Login Options.
Make sure Automatic login is off (leave everything else alone).
Control click (right click) on your newly created account on the left and select Advanced Options...
The field that says Home directory probably says /Users/your-new-account-name, where your account name is whatever you just set up.  Change it to /Users/your-old-account-name.  In other words you are pointing the home directory back to your original account.
Also note the User ID, which I assume is 501.  You are not going to change this but I want to talk more about it a little later.
I think at this point there are two ways to go.  The first way is for you click OK and immediately reboot.  When presented with the login screen (remember Automatic login has been turned off) log into the new account you had configured for the setup.  Basically all that was done was to "move" the home directory for the new account to use the old account's home directory. 
I'm assuming you originally only had the one account to begin with (i.e., the one I referred to as your-old-account-name).  In that case its User ID should also be 501.  This is critical for the permissions stuff so that changing the home directory of the new account should not affect the permissions.
So at this point, if this all works (like I said I'm making this up as I type), you can use your old account but you need to log in with the new account name.  If you are happy with that you can trash the /User/your-new-account-name.  It's useless anyhow since it too is based on User ID 501.
The second way you could go (remember I said there were two ways to go) is to change the account name in the Advanced Options (the same panel you changed the home directory in) to the old account name.  Then click the OK button and reboot.
So this second scheme is you changed both the home directory and account name.  I never did this before so I don't know what the implications of this are.  But if it works, after clicking the OK button, reboot, and with this scheme you would log in with your old account name.  Again trash the /Users/your-new-account-name.  Theoretically, you would now be back where you started before you ever tried the BT factory reset.
I've described only one scenario and as I said there are other approaches.  But this post is getting too long and maybe confusing.
I hope this is clear enough.  No guarantees.  And I'll say it again.  Make sure you backed that disk up before trying any of this.