MSP-EXP430FR4133: Still unable to achieve power usage quoted in the documentation

Hi Josh,
Could you please explain more details about the current measurement? Do you measure the current consumption for the whole LaunchPad, including FR4133 and the LCD screen? If so, this power consumption will be probably larger than 1uA since the LCD screen also consumes current.
Another thing that you need to pay attention is that please make sure to set all the unused IOs to a certain state -- don't leave them floating.

You can use below code as a reference. And please make sure you just measure the FR4133's current consumption, without LCD screen.

#include <msp430.h>

#define pos1 4                                                 // Digit A1 - L4
#define pos2 6                                                 // Digit A2 - L6
#define pos3 8                                                 // Digit A3 - L8
#define pos4 10                                                // Digit A4 - L10
#define pos5 2                                                 // Digit A5 - L2
#define pos6 18                                                // Digit A6 - L18

const char digit[10] =
{
    0xFC,                                                      // "0"
    0x60,                                                      // "1"
    0xDB,                                                      // "2"
    0xF3,                                                      // "3"
    0x67,                                                      // "4"
    0xB7,                                                      // "5"
    0xBF,                                                      // "6"
    0xE4,                                                      // "7"
    0xFF,                                                      // "8"
    0xF7                                                       // "9"
};

int main( void )
{
    WDTCTL = WDTPW | WDTHOLD;                                  // Stop watchdog timer
    
    P1OUT = 0x00;P2OUT = 0x00;P3OUT = 0x00;P4OUT = 0x00;
    P5OUT = 0x00;P6OUT = 0x00;P7OUT = 0x00;P8OUT = 0x00;

    P1DIR = 0xFF;P2DIR = 0xFF;P3DIR = 0xFF;P4DIR = 0xFF;
    P5DIR = 0xFF;P6DIR = 0xFF;P7DIR = 0xFF;P8DIR = 0xFF;

    // Configure XT1 oscillator
    P4SEL0 |= BIT1 | BIT2;                                     // P4.2~P4.1: crystal pins
    do
    {
        CSCTL7 &= ~(XT1OFFG | DCOFFG);                         // Clear XT1 and DCO fault flag
        SFRIFG1 &= ~OFIFG;
    }while (SFRIFG1 & OFIFG);                                  // Test oscillator fault flag
    CSCTL6 = (CSCTL6 & ~(XT1DRIVE_3)) | XT1DRIVE_2;            // Higher drive strength and current consumption for XT1 oscillator


    // Disable the GPIO power-on default high-impedance mode
    // to activate previously configured port settings
    PM5CTL0 &= ~LOCKLPM5;

    // Configure LCD pins
    SYSCFG2 |= LCDPCTL;                                        // R13/R23/R33/LCDCAP0/LCDCAP1 pins selected

    LCDPCTL0 = 0xFFFF;
    LCDPCTL1 = 0x07FF;
    LCDPCTL2 = 0x00F0;                                         // L0~L26 & L36~L39 pins selected

    LCDCTL0 = LCDSSEL_0 | LCDDIV_7;                            // flcd ref freq is xtclk

    // LCD Operation - Mode 3, internal 3.08v, charge pump 256Hz
    LCDVCTL = LCDCPEN | LCDREFEN | VLCD_6 | (LCDCPFSEL0 | LCDCPFSEL1 | LCDCPFSEL2 | LCDCPFSEL3);

    LCDMEMCTL |= LCDCLRM;                                      // Clear LCD memory

    LCDCSSEL0 = 0x000F;                                        // Configure COMs and SEGs
    LCDCSSEL1 = 0x0000;                                        // L0, L1, L2, L3: COM pins
    LCDCSSEL2 = 0x0000;

    LCDM0 = 0x21;                                              // L0 = COM0, L1 = COM1
    LCDM1 = 0x84;                                              // L2 = COM2, L3 = COM3

    // Display "123456"
    LCDMEM[pos1] = digit[1];
    LCDMEM[pos2] = digit[2];
    LCDMEM[pos3] = digit[3];
    LCDMEM[pos4] = digit[4];
    LCDMEM[pos5] = digit[5];
    LCDMEM[pos6] = digit[6];

    LCDCTL0 |= LCD4MUX | LCDON;                                // Turn on LCD, 4-mux selected

    PMMCTL0_H = PMMPW_H;                                       // Open PMM Registers for write
    PMMCTL0_L |= PMMREGOFF_L;                                  // and set PMMREGOFF

    __bis_SR_register(LPM3_bits | GIE);                        // Enter LPM3.5
    __no_operation();                                          // For debugger
}