Apple Macintosh PowerBook 150 - Manual (Page 15)

Problems turning on your computer?
m The computer made a sound, but you can’t see anything on the screen.
Adjust the brightness control (marked with the icon ¤) and the contrast
control (O) until an image appears and the screen is easy to read.
m
Nothing happened when you pressed the Power On button.
Make sure the power adapter is connected to both the computer and a
power source. If the power adapter is plugged into a power strip, make sure
the power strip is plugged in and turned on. Try pressing the Power On
button again.
If these suggestions don’t solve the problem, see Chapter 9,
“Troubleshooting,” for further help.
O
Contrast control
¤
Brightness control
5 Setting Up Your PowerBook