Most people intuitively understand the importance of rebooting computers or smartphones, but rebooting stereo systems is a less understood approach to troubleshooting audio problems.
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Before you decide to send your stereo in for repairs, or sell it, or buy a new one, a simple reboot may be all you need. Rebooting a stereo system is very simple and can be done by anyone, even if you have no experience with electronics or stereos in particular.
If a product is intended for entertainment and requires power to function, chances are it contains electronics that can become so jammed that they no longer respond, regardless of user input.
The component may be turned on with the front panel illuminated, but buttons, knobs, or switches may not function as intended. Or a disc player tray may not open or a loaded disc may not play. Products may not even listen to a wireless/IR remote control in addition to the front panel user interface.