Greg Chappell , May 13, 2010; 02:39 p.m.
Try pressing the INFO button multiple times. That's typically how you do it with Olympus cameras. The first press may bring up the digital level and a second press completely turns the LCD off.
If that does not work, it may not be possible with an E-P1 since that's the only viewing method other than the optical finder you can buy for the 17mm, which I am assuming is the one you refer to having.