Issues with Kawei SX210

I’ have a Kawei SX 210 on the bench and am trying tom figure out some things. To do a PanelCheck it says to hold down "the lowest C major chord (C6-E5-G5) and power on. First it’s difficult to hold all of those and power on. Even when I can accomplish the panels lights never flash. HELP

If you say “ holding down C6 - E5 - G5 is difficult” I am assuming you do something wrong. That chord is 1st - 3rd - 5th white key from the left. KAWAI decided to count keys from right to left.

Try that ….