problem with Yamaha DX21

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problem with Yamaha DX21

Postby dtmttran » Fri Oct 05, 2018 5:25 am

Recently i've purchased a Yamaha DX21, the owner said that it wasn't outputting any sound, so it was somewhat cheap. Later I figured some controls weren't working and also the characters on the screen seem scrambled. I've figured that probably the rom is corrupted or something of the sort. Any ideas on what's ocurring? I've really been looking forward to playing on this little guy.
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Re: problem with Yamaha DX21

Postby cake100 » Mon Dec 31, 2018 4:59 am

I too had an issue with mine and the members here helped me resolve it quickly: ... &start=480
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Re: problem with Yamaha DX21

Postby Kentronix » Mon Dec 31, 2018 11:15 am

Battery backup failed perhaps ?

I had this on my DX11, swapped the battery and did a system reset and its now fully functional.

I took pics of what I did so although it wont be exactly the same it will give you an idea, first up I would look for details of how to do a reset, IIRC I had to turn the DX11 on while holding certain keys down. After this it functioned but would then fail every time I turned it off, until I swapped the battery. The screen was corrupt although I could cycle through different corrupt instruments. Most were silent although some made odd screeching noises.
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