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Whats causing the constant buzzing in my casio CTK800 keyboard it starts as soon as it powers up

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My Casio ctk 811ex wont power up anyone more.Is there an internal battery that needs replacing ? What could be causing the problem ? 2 weeks ago it was working fine


ALWAYS start with the "easy" things 1st. Is the AC outlet on the wall working properly? Is the "wall-wart" power supply working correctly? If no defect is found, check the DC power jack located on the rear of the keyboard. Does it seem to be loose or does moving the power supply jack up/down cause any change? New wall-wart power supplies can be purchased from Radio Shack and usually at a lower price than the original factory replacements.

Mar 29, 2015 | Casio Music

1 Answer

What could cause my keyboard to shut off while it's being played for about a minute?


If power supply is not original and time of shut off depends on speakers volume I suspect power supply has no enough power. If it is all original then problem may be in power management switching off

Oct 02, 2014 | Casio LK-100 Keyboard

2 Answers

I lost my adapter to my keyboard and I need to find either a substitute or a new way to turn it on without the adapter, HELP!!!.


Some Casio Keyboards use 9V DC (center negative) others 12V DC (center negative).
If check what voltage your Keyboard use. Generic AC adapters are usually center positive. So you have to invert the wire with a new DC plug to make it center negative,
Easiest is to buy a Casio ac adapter made for your keyboard from a Casio retailer.

Sep 12, 2013 | Casio Keyboard Power Adapter

1 Answer

Casio keyboard won't power on


If batteries or power adapter does not power up the keyboard...possibilities are...if it has a fuse inside or fusible link check it.replace if blown.Another possibility is power component has a short. maybe from constant movement of power plug into keyboard.sometimes just by inserting the plug and wiggling it can solve the issue..having this fixed by a technician can cost a lot of money.but,if your keyboard`s value is less than the cost of fixing it,might as well replace your instrument.

Feb 21, 2012 | Casio 76 Key Smartmedia Keyboard

2 Answers

Casio ctk-501 the power input cracked on the curcit board i did a bypass wiring over the crack and it got power works again but only till i start playing a bunch of keys then the sound gets stuck and the...


When wiring around circuit board cracks, one must use adequate sized wires and keep the leads short. Also you MAY have a microscopic crack in yet another conductor that flexes when you play the keyboard and freezes it. Use a high intensity LED light from the topside to "candle" the board and look for cracks. Look for cracking of the board material that may have tiny cracks in the circuit traces.

Nov 17, 2011 | Casio Ctk 496 Electronic Keyboard with 61...

2 Answers

Keyboard not powering up. Want to change the fuse/s. Don't know where fuse is located.


There probably is NOT a fuse and usual cause is problem with the adapter or the power connectors. Broken solder of the connector in the keyboard is common. Broken cords on the adapter is common as well.

Oct 29, 2011 | Casio Ctk 496 Electronic Keyboard with 61...

1 Answer

I bought a usb to midi device for my Casio CTK-491, but none of my VST's or DAW's receive midi information from the keyboard, The programs see that there is a midi input and output but the computer...


what program are you running and did you set up your keyboard with the software so it can recognize it. Depending on what software it is your using as soon as I know I can tell you how to get it working. I use my midi keyboard with everything from reason, Ableton live, pro tools logic logic express vdj traktor basically every software!

May 29, 2011 | Casio Ctk491 Midi Keyboard

2 Answers

Casio CTK-651 keyboard wont switch on


An internal fuse is UNLIKELY.

More likely is either a bad connection/connector at power input or a bad or intermittent power switch.

Jun 24, 2010 | Casio Music

1 Answer

Casio Privia PX-800: When using the sustain


Check if the cble frm the pedal MIGHT be flexing or pulling on the keyboard case when you use it. Such movement COULD vibrate the power connector causing your problem.

Make sure you have the right power supply for the unit as one with too large a hole for the power pin would be intermittent like this.

Jan 26, 2010 | Casio Privia Keyboard Case

1 Answer

I have a casio keyboard that i've had for awhile. but ever since a couple weeks ago wen i would plug it in and hit a key to try to play i would hear like a weird noise. almost like a buzz or a fuzzy sound....


If it runs on a wall wart transformer, the transformer rectifier in it may have failed. Try a new one of the same rating. It is also possible that the input filter cap in the keyboard has failed resulting in un-pure DC voltage to the keyboard.

Aug 26, 2009 | Casio Music

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