We have a FANUC robot controller R30iB Mate Plus. We were trying to install the PAC code and there was an accidental power cycle after which teach pendant only displays black screen. We are not able to go past that screen. However, on pressing F1 we see a screen with some text in Japanese language. After power-on, we opened the controller and saw all LEDs on the main board are lit. I wanted some help in diagnosing the issue and what steps should we take to resolve this issue.