Please check whether this development kit has the right code loaded before running. In normal cases, the LCD on this development kit will only come up if there is a correct code loaded into it. To test this kit for a missing software issue rather than a hardware issue, one can use TI IDE (CCS, Code Composer Studio) to load the MSP-EXP430FR6989 Launchpad demo code into the kit.
After importing this demo code to the IDE, build and debug it in the device. Its LCD will display.