Problem installing

1st Official Post

    I followed the Wiki instructions to create a new SD card installation. Putting the card into the Pi (3B+), however, has no effect. The monitor says "No signal detected" and there is no activity indicated by the friendly LEDs.

    What I did:

    Formatted the card with ext4 using gparted.

    Copied the image to the card using

    dd if=LibreELEC-RPi2.arm-9.0.2.img of=/dev/sdb1 bs=4M

    per the instructions.

    Do I have to set the boot flag on the card in gparted?

    When I do parted -l I see

    Model: Generic STORAGE DEVICE (scsi)
    Disk /dev/sdb: 15.6GB
    Sector size (logical/physical): 512B/512B
    Partition Table: msdos
    Disk Flags:

    Number Start End Size Type File system Flags
    1 4194kB 15.6GB 15.5GB primary

    Hmm. No filesystem? Well maybe that's why the Pi doesn't like it, then...

    fdisk -l /dev/sdb1

    says

    Disk /dev/sdb1: 14.5 GiB, 15548284928 bytes, 30367744 sectors
    Units: sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disklabel type: dos
    Disk identifier: 0x60575385

    Device Boot Start End Sectors Size Id Type
    /dev/sdb1p1 * 8192 1056767 1048576 512M c W95 FAT32 (LBA)
    /dev/sdb1p2 1056768 1122303 65536 32M 83 Linux
    So... there is a filesystem after all? Confused as... something...