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Re: RX-V1500 won't turn on...unplugging and plugging
Have you checked for a blown fuse inside the receiver? Also This unit has a Protection Circuitry - which may have been activated by a fault. Also Make sure all speaker wire connections and on all speakers are secure and that the wire for each connection does not touch anything other than what its ment to.
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Remove the Power Cord, then press and hold the power button for 30 seconds. After 30 seconds, plug the cord back in and press the power button. If it works, you had a Static Charge Buildup that had to be released.
Remove the Power Cord, Open the Case and remove one of thememory chips. Set the chip aside then try rebooting the computer. If it boots, then you know the memory chip you set aside is bad so mark an x onit with an ink pen. If it fails to boot then move the chip to the nextmemory slot and try rebooting. If it fails take the chip out and set itaside, then put the other chip in and try booting it in both slots. If itboots, just to verify that the chip set aside is bad, mark an x on it and putit into the open memory chip slot and try booting.If the above two steps fail, pull the main power plug that comes out of the power supply and plugs into the motherboard. The end that plugs into the motherboard is probably about two inches long, Grab the release latch on it and press it while pulling up to unplug it. Wait 30 seconds then plug it back into the motherboard. Push it back in firmly. Try turning on the system.
Remove the power cord.
Locate the 120V / 240 V ac selector switch. (within 4 inch from the power inlet)
Move it back and forth few time.
Make use it's set to the correct voltage selection.
Reconnect power cord and power up.
This AC selector switch can get shifted and set to different position.
Take out the AC power jack and then remove the laptop battery. Plug AC power back in and see if the laptop will turn on. If it turns on let it boot the operating system and then shut down as normal, remove the power cord and reinsert the battery and again see if it will switch on. If it does then there has been a glitch with the battery. If it doesn't then there is a problem with the battery.
If the laptop won't switch on either with or without the battery then there is a possibility that the motherboard has developed a problem.
Then unplug the power cord from the power outlet. Wait at least 10 seconds before re-plugging the power cord into the power outlet in the wall (bypass any power strip) and the power adapter into the printer. This will give enough time for the printer to reset itself. If printer won't automatically turn on, press the power button. If that doesn't help, please contact Lexmark Technical Support Center for additional assistance.
Check your power supply cables
Your power supply cables may not be fully secured.
Let's unplug and reconnect your power supply
Disconnect the power cord from the back of your console. Unplug the power cord from the wall outlet and the power supply unit. Reconnect the power cord to the console. Then plug the power cord back into the wall outlet and the power supply unit
Make sure that all three connections are firmly secured.
Turn your console back on.
Check the light on the power supply. If this solution worked, your power supply light will be green
Disconnect the power cord from the back of your console. Unplug the power cord from the wall outlet and the power supply unit. Reconnect the power cord to the console. Then plug the power cord back into the wall outlet and the power supply unit.
Make sure that all three connections are firmly secured.
Turn your console back on. Check the light on the power supply. If this solution worked, your power supply light will be green and the power button will look like this:
This was happening to mine also, all of a sudden. This solution came from the owners manual. Sure enough, the impedance selector was stuck in the middle , between 4 and 8 ohms....I also, made sure the speaker wires were not touching each other at the splice. Problem fixed. B
The unit fails to turn on when STANDBY/ON is pressed, or set in the standby mode suddenly soon after the power has been turned on.
The power cord is not plugged in or the
plug is not completely inserted.
The IMPEDANCE SELECTOR switch
on the rear panel is not fully set to the
upper or lower end.
Firmly plug in the power cord.
Set the switch fully to the upper or
lower end when the unit is in the
This set is getting old and is in the Archives section of the Yamaha consumer guide area. But, you can still download the owners manual if you need one.
If it is going into protection mode even when there are no speakers connected OR when the sound level is very, very low or zero it is not good news.
Yes, unplugging the line cord will cause the protection system to reset itself. But, if it shuts itself off again soon after rebooting it is a sign of bad grease in the output stages -- in all probability.
Let me explain: The audio output transistors are mounted to a large heatsink which keeps them cool during operation. They are electrically isolated from touching the heatsink by an electrical insulating washer. But, in order to keep them cool and allow for good thermal conductivity of the heat generated by the output transistors the washers are treated with a heat conducting grease. Over time this grease will dry out and lose its heat conductivity ability allowing the temperature of the transistors to rise; as the heat goes up they conduct more current and cause the protection system to activate and shut the set down (in order to avoid damage to the set).
That is the most common cause of your symptoms. However, there are several other possibilities, but I give this explanation a 90% probability based on my experience.