Need Is power on the line or the circle? By DIY Posted on September 14, 2022 The line symbol means “power on” and the circle symbol means “power off”. The presence of both (I/O) on a push button means the switch toggles the power. Related Topics: Most Popular How To How to Record Video on Windows 10 Linux How to Fix: WiFi Connected But No Internet Access Android How To Remove A Virus From An Android Phone How To How to Clean Hacked WordPress site Windows Epson Error Code 0x97 Windows How to run Canon LaserBase MF3110 on Win10 64bit