I'm happy to help with this! The "d0" on the display is a "stuck button" error code. This means that the panel detects a button is being continuously touched. This can happen if the panel is wet or if something actually is continuously touching the panel. Make sure the panel is clear of any debris or water droplets, and then restart the cooktop using the Power button. If that does not resolve the issue, please reference ticket number 1143187484, and contact us directly through Facebook Messenger: http://m.me/samsungsupport; or Twitter: https://twitter.com/messages/compose?recipient_id=18768513. ^Jecca