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Hi Thank you for your forum that I have joined to ask about this synth🎹 i bought cheap some years ago in Tasmania (Australia )for next to nothing (it had a few keys bent upwards). I have many other synths but this is the only Casio and it worked fine but has been stored for 5 years or so up to recently when I dusted it off. I tried to power up with a 9v PSU and nothing and only when I opened the synth and realised the DC plug/socket deal is reversed in the music tech universe...☹️ So hoping there was a diode or some other polarity protection that meant I hadn't wrecked my Casio...When I powered it with a 9V 1A PSU (which are the specs roughly) and bench PS same thing happened: . I get to play a note or just wait for a couple of seconds before the thing powers off. There is then a period of latency when it does not respond to restarting, but after a few seconds of being off I can go through the whole process again.💤 On reading other posts, I am hoping I haven't damaged the power board, 🔥given it does power on , the little LCD starts up and i can play a riff or two, 🎹🎶or i could (the problem seems to have deteriorated with my testing) , but only for a few seconds. The power is of good character, but it has no stamina.🤭 I am wondering if a board needs repairing or replacing, or whether it is a blown capacitor (it sort of feels like that, the time and characteristic of the failure fade out is very capacitoresque) I have a well stocked workshop with DMMs, scopes, all the parts one could ever dream of and I can solder myself out of a tight situation BUT as you may have gathered I am no synth technician and can't justify paying one to fix this. I am hoping I can get some advice from this forum, which has already been an invaluable resource: Is there anything I can try next or any other diagnostic steps? Or does the cost and expertise required to fix this mean I should cut my losses and move on (to a Roland Juno 106 that needs a new voice chip )? sorry long post... Any help is appreciated. Thank you and:

I have been enjoying my Casio WK-1350 for years. I have been plugging it into the wall for its power source. Today I thought I would try unplugging it from the wall and powering it with 6 D cell batteries. When I pushed the Power Button on the keyboard nothing happens. Any suggestions ! ? ! thanks !