My korg le won't turn on.. it worked great then one day went to turn it on and nothing any suggestions?

This is the help that the owner manual offers...completely useless.
However, it is likely that if your piano isn't turning on, either your connection is bust or your AC power adapter is broken. You can purchase a replacement relatively cheaply. https://www.thomann.de/gb/korg_netzteil_ka_320.htm

Hello, You may want to reset your machine, all data and pre loaded programs, for this you must turn on your M50 press the global mode button, click on the top arrow next to (basic) select option 2, load pre-preloaded demo data, you then choose all (PCG and demo songs). press OK. Your Korg will re install all factory samples, data and settings. Once completed It will then instruct you to turn off your machine. give it a minute or so to self upgrade before turning it back on, once you turn it back on you should see updating panel notifications right and left, you should be able to use all of the sounds and combi's available for M50. that's a factory reset. I hope this helps, Have a great day.

Here's a link to to the korg site to download the manual and there is a link on the page to reset: http://i.korg.com/SupportPage.aspx?productid=223

Hello, I own a Korg M50 myself and I had the same issue, its a quality control issue at their factory but, I may have a solution for you I found at a Korg forum. the issue is with these teeny cables inside the synth. you open the rear panel and firmly press each teeny cable into the terminals again and re attach and secure them firmly just finger push them all into their teeny sockets. this should stop the freezing I tried it the synth played all night with out freezing . I hope this helps other wise the solution with the capacitors is simple you order a new mainboard but they run about 400 plus. but try my solution it may work for yours this answer comes from a korg tech, he stated 90% of this freezing issue he has encountered has been these loose teeny cabling adapters, hope this helps, Have a great day..

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Seems processor board not starting. Here is user manual

KORG Pa800 2.0 User's Manual (E12)

Here is service manual

KORG PA800 SM Service Manual download, schematics, eeprom, repair info for electronics experts (elektrotanya.com)

It may help you.

Try this site:

http://www.tritonhaven.com/

Download the owners manual from here and try doing a reset to factory settings
http://www.korguksupport.co.uk/page.cfm?pageid=391#Owners Manuals

I agree, it's probably either the power supply (has it a fuse?) or the power connector or the power switch or an internal fuse. Probably a simple fix.

There probably is a cable or connection inside that is loose... The keys are scanned as a matrix so some connections are in common...

HOWEVER: Since you have had it several days DO NOT delay, call for warranty service. This is not a DIY repair unless you are adept and comfortable with electronics.