I have a failing WK3800 which I've had for less than 2 years and it has many problems: first I lost all the songs in the internal memory, then the keys 3, 6, 9, and + stopped functioning. Now my external rythym pedal doesn't work and for a while I was starting and stopping my rythyms manually by the start/stop button...now I can only stop the rythym by turning off the keyboard. I had it cleaned, but the problem remains. Supposedly it's one of the boards/tablets, but getting one in Mexico is next to impossible. HELP!!!!

Have you ever changed the internal Lithium Battery. Try the reset here, although it is for a different model. The Keyboard was actually made by Casio and sold with the Radio Shack name on it.

REPLACING THE MEMORY BATTERY

Your keyboard uses one lithium battery to protect some types of data when it is turned off. This battery is installed at the factory,
and lasts up to 5 years. If the keyboard's memory is erased when you turn the keyboard off, take the keyboard to your local Radio Shack store to replace the lithium battery.

RESETTING THE KEYBOARD

Note: Resetting the keyboard clears all information you stored in the keyboard's memory, including the parameter settings, song
sequencer, pattern sequencer, and registration memory. Resetting the keyboard's parameter settings clears only those settings from
the keyboard's memory. To reset the keyboard, turn the power off.
Then hold down ENTER. Reset? appears. Press YES.

https://www.google.com/search?q=Radio+Shack+Midi+Keyboard+MD-4072+reset

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maybe this will help ...... I have a Korg M1 ..... it has a small button battery for maintaining memory and sounds .... mine lasted about 10 years ...... I looked up in Google how to change the battery .... I looked up in my M1 instructions how to reload the sounds .... I had lost all my synth sounds except the basic piano ...... I changed the battery and reloaded the sounds from a backup card I had bought years ago .... M1 works perfectly now .... you probably lost any saved songs .... contact Yamaha how to change the battery and reload the original songs .... any saved songs are gone .... next time, back them up ... good luck

You may be running out of internal memory. Try deleting, songs & SMF etc that you may have recorded to INF AFTER moving them to an SD CARD first.
IDES4 can also be used to move user tones etc and do a factory init.

There could be several reasons for your Kurzweil PC2x keyboard resetting to factory presets and purging all user data. It is possible that there is an issue with the keyboard's internal memory, or there may be a problem with the battery or power supply. Another possibility is that there is a software issue with the keyboard, such as a bug or a conflict with other devices or software. In order to troubleshoot the problem, you could try resetting the keyboard to factory settings and then reloading your user data to see if that resolves the issue. You could also try using a different power source or battery to see if that makes a difference.

You have to plug in the laptop sorry to say. Think of it as a piano that can be used as a midi controller.

If the blue power light does not light up then there is a problem with the unit or power supply. As it is less than a year from purchase I would advise returning it to the shop.

Transformers RARELY fail. It is likely that either one side of the amplifier has shorted or there is a failure in the rectifier/filter circuit of the power supply. Take it for repair unless you are adept at electronic repair. Do NOT continue to replace the fuse as you MAY cause futher damage. Use a 25 or 40 watt lamp in series with your power cord to limit current while troubleshooting.

I'd say the click track starts from exactly when you hit play even if you've hit play not right on the beat. There might be a setting or preference that can fix this.

Try rewinding back to be right on the beat and see if it syncs with the click

Go to www.Alesis.com, undersupport clickdocuments and downloads.Click drum machines then All. The various drum machine models are then displayed to the right. Under HR-16 for instance you can download the manual in pdf and the presets in sysx. The manual should walk you through the procedure. You will have to replace the internal memory battery. They are easy to replace and cost about five bucks. Good Luck!