SOURCE: problem with yamaha rx-c2092
Hi, try to unplug this unit from the wall for a minute or so, It may just need reset. If it still does this I would say that you have a loose wire inside where the power supply is. I would not recommend working on this unless you are computer savvy.
SOURCE: How to do factory reset on a yamaha rx-e810 amp
There are two types of reset. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the device from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done.
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