(1) To bring back an old TV series, see
reboot TV.
(2) To turn off an electronic device and turn it back on. Sometimes it is necessary to unplug from the electrical source and plug back in. A reboot often solves a non-working device because it restarts the operating system.
Rebooting is done for every electronic system that uses a CPU and software, which is nearly every device today. People have had to reboot a ceiling fan by unplugging and plugging it back into its AC source in order for the wireless remote to work again.
Why So Much Rebooting?
Because a program's internal memory (RAM) can be overwritten due to erroneous program logic. The program's instructions or counters the program uses to keep track of things can be altered causing the processor to halt. Reloading the OS and application resets everything to startup settings.
Restart vs. Shut Down/Start
If a Restart option in a device is selected, the current applications are closed, and the operating system is reloaded. This "warm boot" does not clear memory. However, when Shut Down is chosen, the unit is powered off and has to be turned back on, and it is often recommended to wait 10 to 20 seconds between off and on. This "cold boot" guarantees that memory is cleared, which is often more effective for solving problems than restarting.
Cold Booting a Cable Box
Today's cable TV boxes and streaming media hubs typically no longer have an on/off switch. The only way to reboot such a device is to unplug it from the wall and plug it back in.
Reboot Anything
Since its widespread use starting in the 1980s, the term has evolved to mean "start anew" for just about anything such as the economy, a TV series, a car design, etc. See
cold boot,
clean boot and
boot.
A Solution for Rebooting a TV Box
Many cable and streaming boxes no longer have an on/off switch so they can be updated in the middle of the night. Because they sometimes fail and require a reboot, a remote-controlled power bar can reboot them instead of pulling the wall plug. There are many varieties such as these Magicfly units.