My C314 turns on but none of the bottons work.

If your Yamaha PSR-2000 keyboard is turning on and the blue backlight is displayed on the screen, but none of the function keys are lit up and not responding, there may be a few different causes.

1. Check if the power supply is working properly and is providing enough power to the keyboard. If the power supply is faulty, it may not be providing enough power to the keyboard.
2. Make sure that the keyboard's internal battery is charged. If the battery is low, the keyboard may not function properly.
3. Check if the internal fuse of the keyboard is not blown, which is a common problem on electronic devices.
4. If none of the above steps work, the problem may be with the control board or the display, and the machine may need to be serviced by a professional technician.

I would recommend checking the user manual or contacting the Yamaha technical support for further assistance, as they may have specific troubleshooting steps or solutions for your model.

PREES ONE OF THE FUNTION KEYS TO FIX IT AND THEN IT WILL TURN ON THE BLUE BACKLIGHT

I had the exact problem, mine was a YPG 535 brand new in box I put everything together with stand and FC4 pedal. When i got ready to play just a blue screen and none of the red lights came on and no sound, I notice when i was messing with the on and standby button hopeing it would work the speakers would make a popping noise I personly thought it was a manufacturing defect.....i'm sending it back to have it replace. I never had problems with yamaha products but seems like more and more defects are happing with newer portable grand series!

1. Make sure nothing is plugged in.
2. Turn the GAIN, LEVEL, and FX knobs for each channel, counter-clockwise all the way.
3. Bring the MAIN fader all the way down.

If the signal LED's above the MAIN fader are still lit, then the board most likely has a short in it and will require repair.

If the signal LED's are dark, repeat the following on each channel...

1. Rotate GAIN clockwise until the mark on the knob is at "12 oclock".
2. Rotate LEVEL clockwise until the mark on the knob is at "3 oclock"
3. Raise the MAIN fader to "0".
4. Check LED's - if they light up then the channel you are working on is "noisy" or has a short in it.
5. Return GAIN, LEVEL, and MAIN to "all off".
6. Repeat with next channel.

reverse the pin of mains supply and try ,and open close cd tray switch,clean cd tray with smooth brush

Theres no reset that i know of. Have you checked the power box (plugs into the AC outlet) voltage and that it is working as it should?

Hi, Provided your Korg works as normal, besides the display being blank and lit, I may have the answer. It sounds like the contacts connecting the display have somehow become dirty. This could have happened from something getting spilled on the display. To fix is easy enough if you have a little mechanical aptitude. unplug unit/take batteries out,and disassemble unit to gain access to the main circuit board where screen is located, the screen may be held in place with a tin casing either soldered to board or with prong set though the circuit board and twised on the reverse side to hold in place. After removing this there should be a little rubber strip between the screen and circuit board-this is the contact strip that you need to clean with rubbing alcohol. Clean the screen where the contact strip meets the screen. do the same on the circuit board, reassemble and you should be back in business. I hope this was useful, thanks for asking FixYa, and good luck, Prodzilla.

GO TO SITE CALLED ASK.COM.

I have found a site with SWR schematics: They have one for the SM400 which may be very close to what you have, or at least parts may be the same.

http://www.freeinfosociety.com/electronics/schempage.php?cat=1

Check the poower supply. It sounds like the microprocessor in the unit is not being reset and is not functioning.

There probably is a 5 volt supply that has partially failed.