1. Unplug the SR-300's power cord from the wall outlet.
2. Plug the power cord back in.
3. Instantly grab your remote, point it at the unit, and press these three buttons in rapid succession within 3 seconds:
- Press OPTION
- Press the Center White Key (the middle "Enter/Select" button inside the directional arrows)
- Press POWER
If you hit that button order within the 3-second window right after plugging it in, it will bypass the permanent memory lock and clear PANEL LOCK ALL instantly.
It's odd that you can't find this issue in the manual, however, are there any blinking indicators? If it's a microprocessor(computer inside your Yamaha) that's locked up, you may try unplugging the power for an hour, and then plug it back in. If you're interested in having your Yamaha repaired, please visit my website at audioserviceclinic.com. You may contact me there. Thank you.
SOURCE: yamaha rxv-992 receiver wont power up
Disconnect all your speakers from the receiver. Turn the power on, and see if it stays on. If the unit shuts off with all the speakers disconnected, then you most likely have a faulty unit, and it will need to be repaired or replaced.
If the unit stays on with all the speakers disconnected, then you most likely have a bad speaker or a bad connection with the speaker wire.
Starting with one speaker, hook it up, and turn the unit on, and again see if the unit stays on, or if it shuts off. Do this until the unit shuts off when you connect a speaker.
Then disconnect all the other speakers, and leave the suspect speaker attached. Again, try to power up the unit. If it fails with that speaker attached, but works when it is not attached, then that speaker is your problem.
SOURCE: Cannot turn TV off when playing CD's with samsung HT-X810R/LG50PG
Problem traced to Samsung's Anynet+ System interacting with LG's Simplink. They seem to be
compatible. Cured by Menu/Option/Simplink/OFF. Hope this helps with anyone else having this problem. trev6.
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I have the same issue with my yamaha sr300. Can only operate with remote. When I press the keys "input" or volume up and down on the unit I get the message "panel lock all" My young son was randomly pressing the buttons on the unit and this's happened - don't know if it's related or just coincidence :(
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