Chosen Solution

My keyboard has no power when plugged in to the dc plug. I have taken the unit apart and have found nothing unusual on the circuit boards other then blackened grease where the on off switch runs. Any suggestions?

Hi ideally we need some photos you can add some photos by following this great guide Adding images to an existing question That blackened grease could be where the switch has worn out and is no longer performing like a switch (turning in and off) also I would check both sides of the board and check in power in side if the board, also check the fuse in the plug, but for now with no photos that’s all I can really do so when we get some photos we can look into things a bit better;-) hopefully this helps Thanks:-)

@suzang Do you have a DMM (digtial multimeter) so that you can check if there is 9V DC at the plug of the existing adapter? It may be the adapter/adapter cord that is faulty and not the keyboard