[Shield Android TV General] yahoo2016:
I believe there are many changes on L4T 24.2 kernel. In order to have everything working for 24.2 rootfs, 24.2 kernel will be needed.

It seems SATV boot loader could not start 24.2 kernel. The following is serial console print when L4T24.2 kernel failed to start:

[0077.411] fastboot: boot
[0077.413] Flushing data to stroage
[0077.417] emc_switch_frequency: Switch 408000=>800000 KHz successful!
[0077.733] display bmp image done
[0077.736] Loading kernel from fasboot boot commandline
[0077.741] kernel load address: 0x80080000, size: 21729464 bytes
[0077.747] ramdisk load address: 0x84100000, size: 1407768 bytes
[0078.487] Successfully loaded kernel and ramdisk images
[0078.492] dts_overrides: Original DTS size 180153
[0078.497] dts_override_props_based: No node name for offset 0
[0078.508] dts_override_props_based: Enabling node udc@7d000000 based on odm data odm-data: mask: val = (0x00294000:0x01000000:0x00000000)
[0078.521] dts_override_props_based: Enabling node otg@7d000000 based on odm data odm-data: mask: val = (0x00294000:0x01000000:0x00000000)
[0078.534] dts_override_props_based: Enabling node watchdog@60005100 based on odm data odm-data: mask: val = (0x00294000:0x00010000:0x00010000)
[0078.550] dts_override_debug_console: SQA Automation port: UARTA
[0078.562] __dts_override_lane_owner: Could not find node /padctrl@7009f000/sata-lane/
[0078.570] __dts_override_lane_owner: Could not find node /padctrl@7009f000/pcie-lane0/
[0078.578] __dts_override_lane_owner: Could not find node /padctrl@7009f000/pcie-lane3/
[0078.586] __dts_override_lane_owner: Could not find node /padctrl@7009f000/pcie-lane4/
[0078.608] get_root_child_node: Adding node /nct in the device tree
[0078.620] shim_cmdline_install: /chosen/bootargs: androidboot.modem=none androidboot.serialno=04233150100000000000 androidboot.security=enabled
[0078.636] Updated ramdisk "initrd-start" & "initrd-end" in FDT
[0078.649] set vdd_core voltage to 1125 mv
[0078.653] setting 'vdd_core' regulator to 1125000 micro volts
[0078.662] add_resetstatus_in_dtb: Adding reset node under /chosen node
[0078.669] PMC reset status = 0x0
[0078.672] PMIC reset event = 0x40
[0078.678] add_boardinfo_in_dtb: Adding proc-board property under /chosen node
[0078.690] add_boardinfo_in_dtb: Adding pmu-board property under /chosen node
[0078.701] add_boardinfo_in_dtb: Adding display-board property under /chosen node
[0078.710] Kernel cmd args: androidboot.modem=none androidboot.serialno=04233150100000000000 androidboot.security=enabled tegraid=21.1.1.0.0 memtype=0 vpr_resize ddr_die=1536M@2048M ddr_die=1536M@3584M section=256M usb_port_owner_info=0 lane_owner_info=0 emc_max_dvfs=1 androidboot.touch_vendor_id=0 androidboot.touch_panel_id=63 androidboot.touch_feature=0 touch_id=0@63 video=tegrafb no_console_suspend=1 console=ttyS0,115200n8 debug_uartport=lsport,2 earlyprintk=uart8250-32bit,0x70006000 maxcpus=4 usbcore.old_scheme_first=1 lp0_vec=4096@0xfdfff000 nvdumper_reserved=0xfcf00000 core_edp_mv=1125 core_edp_ma=4000 tegra_fbmem=8388608@0x92caa000 is_hdmi_initialised=1 power_supply=Adapter gpt android.kerneltype=normal
[0078.776] nvdumper Carveout: Base = 0xfcf00000 and Size = 0x100000
[0078.790] bct_init bctinit
[0078.793] bct_init bctinit
[0078.964] Starting Bpmp FW
[0078.966] BPMP-FW Carveout: Base = 0xfd500000 and Size = 0x100000