Question about Casio Lighted Keyboard LK90STADMC

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Well, i have a casio LK-35 lighted keyboard and i cannot seem to find the plug that you use to play it. You can also run this keyboard on 6 double A (AA) batteries. I tried the batteries and it worked. I left my house for about an hour and when I came back the batteries would not make it work. It wouldn't turn on or let me play. I'm new to playing and I don't know many notes. I know for an absolute fact I turned it off before I left. The batteries our fresh, right out of the package. Can anybody help me?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: Casio Privia keyboard PX-100

There are a number of issues that could cause this, the most likely culprit is the power supply, when I say power supply I mean the internal power supply, 
This means that you have already obtained a good "known to work" AC to DC power supply, and tested it on your keyboard to see if that is the problem. 
If you have completed this step, then your next step is to test your unit with batteries only, if the keyboard works, then you know your problem, is internal to the keyboard. 
There are two issues to check, before proceeding please read the following note.
 (a note here for those who have no experience working with internal electronics)
If you have no experience working with internal electronics I would not recommend, opening your keyboard. 
Two reasons, one, will void warranty if it still is under warranty. 
secondly, you could accidently cause more damage to the unit. 
Now if you are still reading, and feeling confident, you know that as a child you have dissembled many many electronic devices, just to see how they work. 
If you do decide to open the box, disconnect the power supply to the unit including any batteries. 
open the box and locate the power on button, clean using a Dielectric cleaning agent, can be obtained at most electronic specialty stores. 
clean the power button, may work but doubtful, usually the switch itself is usually bad, there is a way to test the switch, however, that is beyond the scope of this answer, if you are following this you will most likely have the knowledge to do this. 
The second and more challenging issue will be the internal power supply to the keyboard, or the interface that connects to your ac to dc converter. 
This can be much more trickier, and I wont go into it here. 
If you test your power switch determine that it is good then you should consider getting the unit serviced by a technician. 
If you examine the boards, (electronic circuit boards,) and notice burned, connections, (darker than other circuits) then most likely it will not be worth trying to fix. 
Hope this helps somewhat, if nothing else, take this print out to your local service dealer, and that will help in getting your keyboard repaired, 
Delete this part, before taking this to your dealer, 
Most electronic products can be easily fixed with a power switch, or power supply, however, many dealers will not tell you this and give you an estimate of fixing the unit that far exceeds the actual cost of repair, 
an example, in a local TV repair shop, a friend brought in a wide screen Plasma HD TV, quoted repair, $654.00  problem, 
power supply, actual cost, $75.00 my friend ordered the part online and with the help of a friend installed the new power supply returning his unit to full functionality. 
So beware, 

Posted on Mar 05, 2008

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SOURCE: Casio LK 200 and smf software

If you have the smart card slot you can save your songs to the memory card by using Anvil Studio which is a free program. Save your midi song in Format 0 and be sure to use channel 4 for right hand playing and channel 3 for left hand. Be sure to keep the file size under 80k if you have other channels active for other instruments!

Posted on Dec 22, 2008

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SOURCE: Midi

Anvil Studio is an easy way to prep midi files for keyboard use, save channels 3 & 4 "left & right" in Midi 0 format and it will light the keys properly. Keep your file size under 80k!

Posted on Dec 22, 2008

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SOURCE: My casio keyboards ac adapter does not power up

There is some type of system short. If you read the keyboard instructions it will probably have an "important" note telling you not to unplug the keyboard while in the "on" position. Some how this shorts the connection port. Seems as though Casio could prevent this from happening. I got a refund and went with another brand.

Posted on Jul 24, 2009

  • 1 Answer

SOURCE: Can I hook up my Casio keyboard up to my PC (CTK-551)?

if it has a headphone jack on the back of the keyboard then there is a cable that you can buy and put it in the microphone input. Another ideas is to try krystal media it is a free recording program.

Posted on Jan 31, 2010

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Casio LK-100 keyboard is turning off often when chords are played, esp in lower octaves - seems like a short. Where might the short be - way to fix without taking the whole keyboard apart?


Sounds like a lack of power from the external "wall wart" power supply. Is it the correct one that can supply enough current for a chord to be played? (a chord will play more notes at the same time & pull more power from the supply in order to make the sound(s)) If it's the correct power supply or one of the correct current rating check the cable & the connector both at the end of the cable & where it plugs into the keyboard. Perhaps the lead has been tugged accidentally? / Damaged in some way? Turn the volume down a little & see if that helps - that will confirm the power theory :-) Good Luck!

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What kind/type of your Casio 100?
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http://www.retrevo.com/support/Casio-LK-100-Music-Keyboards-manual/id/467dj395/t/2/

Note the manual is free via the Retrevo site... just have some of those annoying hoopps like email address and entering numbers.

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I need a Casio LK-30 AC Adapter


Check out this link:

http://www.zzounds.com/item--CASAD5


It looks like the right one to me. I am ordering one today for our keyboard.

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