Yamaha piano, P80 will not power up - Yamaha Music

Yes you may use it as stand alone piano. Usually everytime you will power ON any yamaha psr model piano will appear as default voice.

first - check the power supply if it's really giving power.
Get voltmeter or plug it to something else you know it's working.

If you are sure it does and still nothing, you need to check the fuse inside the P80. I've been there, it's not so hard to open it
(from below of course)

BTW, it's advisable to user surge protector on such delicate devices like computers and keyboards if there are any fuses that have blown. I can't tell you how many times a blown fuse has stopped equipment from working. I had a blown fuse go in a microwave oven a few years back. I called a repair guy while on a job to fix my Leslie (many years ago) and the culprit, a blown fuse. I could have fied it myself if I had given it more thought.

Check the internal fuses first and you might save some money and a trip to a repair center. , sometimes a fuse can look good even when it is blown. If you have a voltage tester do a continuity check on the fuse just to be certain.It's possible that the P80 does not use internal fuses especially since it uses an external 12 volt power pack There might be info on the fuse in the P80 manual. Otherwise try Yamaha support. A lot of low volage gear run of AC adaptors is unfused.

Another possibility is that the power connector or switch on the P80 is broken. DC power jacks are liable to get broken solder joints due to movement, especially if they are circuit board mounted and not chassis mounted. If you know what you are doing test the connector and switch with a multimeter.

If they are good then also check the wires from the switch to the main board. They a probably connected with a plug, which itself can come lose.

You can test for bad connections with the power off. Only test with the power on if you really do know what you are doing! You won't electrocute yourself but you can easily damage the keyboard if you are not careful.

Unless you are experienced in electronics repair that is as far as you should go.

Yamaha Series Keyboard Parts and Accessories

Either a faulty power supply or more likely a damaged socket

Turn off P155
hold top C key down (furthest white key on your right)
while holding this key down, turn on power,
keep holding key down for 3 seconds, then let go.
should default to grand piano 1 setting

Yamaha pianos go through a self test on start up. This could indicate a problem on the main motherboard.

Try a hard reset.

Hold down top C key while turning on.

Wait for it to start up, if it still freezes its time to take it to the repair shop.

Make sure you have the CORRECT adapter for the unit. It should say Yamaha on it and match the voltage and polarity. Thest the output with a meter. Common problems that happen to the piano itself causing the symptoms is a broken power connector or broken solder at the connector. Use a meter and verify the adapter is producing output. Expect the output to be a bot higher than listed when not plugged into the piano as there is no load on the adapter.

I need a new a new board
Yamaha XM199 for a P80

This pertains to the white keys. If you need to take out a black one, you MUST remove the white ones alongside the black one first.

You push the back end of the key forward (takes a little bit of force) and then lift the back a bit to dis-engage it from the back rail. There is a flat spring under the key. Note how it sets in place.

When re-installing make SURE you get the front of the key engaged with the little lever before attempting to push it forward and down to re-engage the back in the rail.