Originally Posted by
Weezy Rider
Turn the machine on its side. If there is a battery case there, change the batteries. The 1470 and 7500 series used batteries. If a battery change doesn't work, it could be the board, and not worth fixing.
Weezy Rider is correct. I hope it is the battery and not the board as I also was told that if the board goes out, you might not even be able to fix it due to no boards available. I love my 7550. Good luck!