Sep 28, 2017 · Quartz. Flip the watch over onto a soft yet firm surface. Locate the notches around the case back. Place the case back opener around the indentations on the case back. Firmly grip the opener, rotating the tool counter-clockwise. Set the case back aside. Locate the battery, typically placed under a small silver-toned retaining clasp. To restart the watch, first charge it for at least one hour. Next, hold down the power button for about 12 seconds until the display goes white. 9001, 9002, 9003 Some problem occurred with the watch. Power will turn off shortly. Take your watch to an authorized CASIO service center or to your original retailer for inspection and repair. 9010 9eEp.