I’m having trouble booting a jetson nano on an sd-card that previously worked, I briefly get a splash screen and the green power LED but then the power LED turns off when I reach the end of the serial log. I get the following from the serial console:
[0000.125] [L4T TegraBoot] (version 00.00.2018.01-l4t-e82258de)
[0000.130] Processing in cold boot mode Bootloader 2
[0000.135] A02 Bootrom Patch rev = 1023
[0000.138] Power-up reason: pmc por
[0000.141] No Battery Present
[0000.144] pmic max77620 reset reason
[0000.147] pmic max77620 NVERC : 0x40
[0000.151] RamCode = 0
[0000.153] Platform has DDR4 type RAM
[0000.156] max77620 disabling SD1 Remote Sense
[0000.161] Setting DDR voltage to 1125mv
[0000.165] Serial Number of Pmic Max77663: 0x1628e3
[0000.172] Entering ramdump check
[0000.175] Get RamDumpCarveOut = 0x0
[0000.179] RamDumpCarveOut=0x0, RamDumperFlag=0xe59ff3f8
[0000.184] Last reboot was clean, booting normally!
[0000.188] Sdram initialization is successful
[0000.192] SecureOs Carveout Base=0x00000000ff800000 Size=0x00800000
[0000.199] Lp0 Carveout Base=0x00000000ff780000 Size=0x00001000
[0000.204] BpmpFw Carveout Base=0x00000000ff700000 Size=0x00080000
[0000.210] GSC1 Carveout Base=0x00000000ff600000 Size=0x00100000
[0000.216] GSC2 Carveout Base=0x00000000ff500000 Size=0x00100000
[0000.222] GSC4 Carveout Base=0x00000000ff400000 Size=0x00100000
[0000.228] GSC5 Carveout Base=0x00000000ff300000 Size=0x00100000
[0000.234] GSC3 Carveout Base=0x000000017f300000 Size=0x00d00000
[0000.250] RamDump Carveout Base=0x00000000ff280000 Size=0x00080000
[0000.256] Platform-DebugCarveout: 0
[0000.259] Nck Carveout Base=0x00000000ff080000 Size=0x00200000
[0000.265] Non secure mode, and RB not enabled.
[0000.269] BoardID = 3448, SKU = 0x0
[0000.272] QSPI-ONLY: SkipQspiOnlyFlag = 0
[0000.276] Nano-SD: checking PT table on QSPI ...
[0000.281] Read PT from (2:0)
[0000.296] Using BFS PT to query partitions
[0000.302] Loading Tboot-CPU binary
[0000.330] Verifying TBC in OdmNonSecureSBK mode
[0000.340] Bootloader load address is 0xa0000000, entry address is 0xa0000258
[0000.347] Bootloader downloaded successfully.
[0000.351] Downloaded Tboot-CPU binary to 0xa0000258
[0000.356] MAX77620_GPIO5 configured
[0000.359] CPU power rail is up
[0000.362] CPU clock enabled
[0000.366] Performing RAM repair
[0000.369] Updating A64 Warmreset Address to 0xa00002e9
[0000.374] BoardID = 3448, SKU = 0x0
[0000.377] QSPI-ONLY: SkipQspiOnlyFlag = 0
[0000.381] Nano-SD: checking PT table on QSPI ...
[0000.385] Loading NvTbootBootloaderDTB
[0000.452] Verifying NvTbootBootloaderDTB in OdmNonSecureSBK mode
[0000.525] Bootloader DTB Load Address: 0x83000000
[0000.530] BoardID = 3448, SKU = 0x0
[0000.533] QSPI-ONLY: SkipQspiOnlyFlag = 0
[0000.537] Nano-SD: checking PT table on QSPI ...
[0000.541] Loading NvTbootKernelDTB
[0000.607] Verifying NvTbootKernelDTB in OdmNonSecureSBK mode
[0000.680] Kernel DTB Load Address: 0x83100000
[0000.684] BoardID = 3448, SKU = 0x0
[0000.688] QSPI-ONLY: SkipQspiOnlyFlag = 0
[0000.692] Nano-SD: checking PT table on QSPI ...
[0000.698] Loading cboot binary
[0000.814] Verifying EBT in OdmNonSecureSBK mode
[0000.855] Bootloader load address is 0x92c00000, entry address is 0x92c00258
[0000.862] Bootloader downloaded successfully.
[0000.866] BoardID = 3448, SKU = 0x0
[0000.870] QSPI-ONLY: SkipQspiOnlyFlag = 0
[0000.873] Nano-SD: checking PT table on QSPI ...
[0000.878] PT: Partition NCT NOT found !
[0000.882] Warning: Find Partition via PT Failed
[0000.886] Next binary entry address: 0x92c00258
[0000.891] BoardId: 3448
[0000.895] Overriding pmu board id with proc board id
[0000.900] Display board id is not available
[0000.904] BoardID = 3448, SKU = 0x0
[0000.907] QSPI-ONLY: SkipQspiOnlyFlag = 0
[0000.911] Nano-SD: checking PT table on QSPI ...
[0001.016] Verifying SC7EntryFw in OdmNonSecureSBK mode
[0001.073] /bpmp deleted
[0001.075] SC7EntryFw header found loaded at 0xff700000
[0001.271] OVR2 PMIC
[0001.272] Bpmp FW successfully loaded
[0001.276] BoardID = 3448, SKU = 0x0
[0001.279] QSPI-ONLY: SkipQspiOnlyFlag = 0
[0001.283] Nano-SD: checking PT table on QSPI ...
[0001.288] WB0 init successfully at 0xff780000
[0001.293] Set NvDecSticky Bits
[0001.296] GSC2 address ff53fffc value c0edbbcc
[0001.302] GSC MC Settings done
[0001.305] BoardID = 3448, SKU = 0x0
[0001.309] QSPI-ONLY: SkipQspiOnlyFlag = 0
[0001.312] Nano-SD: checking PT table on QSPI ...
[0001.318] TOS Image length 53680
[0001.321] Monitor size 53680
[0001.324] OS size 0
[0001.339] Secure Os AES-CMAC Verification Success!
[0001.343] TOS image cipher info: plaintext
[0001.347] Loading and Validation of Secure OS Successful
[0001.363] SC7 Entry Firmware - 0xff700000, 0x4000
[0001.368] NvTbootPackSdramParams: start.
[0001.373] NvTbootPackSdramParams: done.
[0001.377] Tegraboot started after 51845 us
[0001.381] Basic modules init took 886467 us
[0001.385] Sec Bootdevice Read Time = 12 ms, Read Size = 61 KB
[0001.390] Sec Bootdevice Write Time = 0 ms, Write Size = 0 KB
[0001.396] Next stage binary read took 102859 us
[0001.400] Carveout took -126356 us
[0001.403] CPU initialization took 495390 us
[0001.407] Total time taken by TegraBoot 1358360 us
[0001.412] Starting CPU & Halting co-processor
64NOTICE: BL31: v1.3(release):5b49e7f80
NOTICE: BL31: Built : 08:37:40, Feb 19 2021
ERROR: Error initializing runtime service trusty_fast
[0001.534] RamCode = 0
[0001.539] LPDDR4 Training: Read DT: Number of tables = 2
[0001.544] EMC Training (SRC-freq: 204000; DST-freq: 1600000)
[0001.557] EMC Training Successful
[0001.560] 408000 not found in DVFS table
[0001.566] RamCode = 0
[0001.570] DT Write: emc-table@204000 succeeded
[0001.575] DT Write: emc-table@1600000 succeeded
[0001.579] LPDDR4 Training: Write DT: Number of tables = 2
[0001.626]
[0001.627] Debug Init done
[0001.630] Marked DTB cacheable
[0001.633] Bootloader DTB loaded at 0x83000000
[0001.638] Marked DTB cacheable
[0001.640] Kernel DTB loaded at 0x83100000
[0001.644] DeviceTree Init done
[0001.657] Pinmux applied successfully
[0001.662] gicd_base: 0x50041000
[0001.665] gicc_base: 0x50042000
[0001.668] Interrupts Init done
[0001.672] Using base:0x60005090 & irq:208 for tick-timer
[0001.678] Using base:0x60005098 for delay-timer
[0001.682] platform_init_timer: DONE
[0001.685] Timer(tick) Init done
[0001.689] osc freq = 38400 khz
[0001.693]
[0001.694] Welcome to L4T Cboot
[0001.697]
[0001.698] Cboot Version: 00.00.2018.01-t210-39562017
[0001.703] calling constructors
[0001.706] initializing heap
[0001.709] initializing threads
[0001.712] initializing timers
[0001.715] creating bootstrap completion thread
[0001.719] top of bootstrap2()
[0001.722] CPU: ARM Cortex A57
[0001.725] CPU: MIDR: 0x411FD071, MPIDR: 0x80000000
[0001.730] initializing platform
[0001.737] Manufacturer: MF = 0xc2, ID MSB = 0x25
[0001.742] ID LSB = 0x36, ID-CFI len = 194 bytes
[0001.746] Macronix QSPI chip present
[0001.750] SPI device register
[0001.753] init boot device
[0001.755] allocating memory for boot device(SPI)
[0001.760] registering boot device
[0001.768] QSPI bdev is already initialized
[0001.772] Enable APE clock
[0001.775] Un-powergate APE partition
[0001.778] of_register: registering tegra_udc to of_hal
[0001.783] of_register: registering inv20628-driver to of_hal
[0001.789] of_register: registering ads1015-driver to of_hal
[0001.794] of_register: registering lp8557-bl-driver to of_hal
[0001.800] of_register: registering bq2419x_charger to of_hal
[0001.806] of_register: registering bq27441_fuel_gauge to of_hal
[0001.817] gpio framework initialized
[0001.821] of_register: registering tca9539_gpio to of_hal
[0001.826] of_register: registering tca9539_gpio to of_hal
[0001.832] of_register: registering i2c_bus_driver to of_hal
[0001.837] of_register: registering i2c_bus_driver to of_hal
[0001.843] of_register: registering i2c_bus_driver to of_hal
[0001.848] pmic framework initialized
[0001.852] of_register: registering max77620_pmic to of_hal
[0001.857] regulator framework initialized
[0001.861] of_register: registering tps65132_bl_driver to of_hal
[0001.867] initializing target
[0001.873] gpio_driver_register: register 'tegra_gpio_driver' driver
[0001.881] board ID = D78, board SKU = 0
[0001.885] Skipping Z3!
[0001.889] fixed regulator driver initialized
[0001.907] initializing OF layer
[0001.910] NCK carveout not present
[0001.914] Skipping dts_overrides
[0001.918] of_children_init: Ops found for compatible string nvidia,tegra210-i2c
[0001.935] I2C Bus Init done
[0001.937] of_children_init: Ops found for compatible string nvidia,tegra210-i2c
[0001.948] I2C Bus Init done
[0001.950] of_children_init: Ops found for compatible string nvidia,tegra210-i2c
[0001.961] I2C Bus Init done
[0001.963] of_children_init: Ops found for compatible string nvidia,tegra210-i2c
[0001.974] I2C Bus Init done
[0001.977] of_children_init: Ops found for compatible string nvidia,tegra210-i2c
[0001.987] I2C Bus Init done
[0001.990] of_children_init: Ops found for compatible string maxim,max77620
[0002.000] max77620_init using irq 118
[0002.005] register 'maxim,max77620' pmic
[0002.009] gpio_driver_register: register 'max77620-gpio' driver
[0002.015] of_children_init: Ops found for compatible string nvidia,tegra210-i2c
[0002.026] I2C Bus Init done
[0002.030] NCK carveout not present
[0002.039] Find /i2c@7000c000's alias i2c0
[0002.043] get eeprom at 1-a0, size 256, type 0
[0002.052] Find /i2c@7000c500's alias i2c2
[0002.056] get eeprom at 3-a0, size 256, type 0
[0002.060] get eeprom at 3-ae, size 256, type 0
[0002.065] pm_ids_update: Updating 1,a0, size 256, type 0
[0002.070] I2C slave not started
[0002.073] I2C write failed
[0002.076] Writing offset failed
[0002.079] eeprom_init: EEPROM read failed
[0002.083] pm_ids_update: eeprom init failed
[0002.087] pm_ids_update: Updating 3,a0, size 256, type 0
[0002.117] pm_ids_update: The pm board id is 3448-0000-200
[0002.124] Adding plugin-manager/ids/3448-0000-200=/i2c@7000c500:module@0x50
[0002.132] pm_ids_update: pm id update successful
[0002.137] pm_ids_update: Updating 3,ae, size 256, type 0
[0002.167] pm_ids_update: The pm board id is 3449-0000-200
[0002.173] Adding plugin-manager/ids/3449-0000-200=/i2c@7000c500:module@0x57
[0002.181] pm_ids_update: pm id update successful
[0002.211] eeprom_get_mac: EEPROM invalid MAC address (all 0xff)
[0002.217] shim_eeprom_update_mac:267: Failed to update 0 MAC address in DTB
[0002.225] eeprom_get_mac: EEPROM invalid MAC address (all 0xff)
[0002.231] shim_eeprom_update_mac:267: Failed to update 1 MAC address in DTB
[0002.239] updating /chosen/nvidia,ethernet-mac node 00:04:4b:e4:0a:2c
[0002.245] Plugin Manager: Parse ODM data 0x000a4000
[0002.258] shim_cmdline_install: /chosen/bootargs: earlycon=uart8250,mmio32,0x70006000
[0002.273] Find /i2c@7000c000's alias i2c0
[0002.277] get eeprom at 1-a0, size 256, type 0
[0002.286] Find /i2c@7000c500's alias i2c2
[0002.289] get eeprom at 3-a0, size 256, type 0
[0002.294] get eeprom at 3-ae, size 256, type 0
[0002.298] pm_ids_update: Updating 1,a0, size 256, type 0
[0002.303] I2C slave not started
[0002.306] I2C write failed
[0002.309] Writing offset failed
[0002.312] eeprom_init: EEPROM read failed
[0002.316] pm_ids_update: eeprom init failed
[0002.320] pm_ids_update: Updating 3,a0, size 256, type 0
[0002.350] pm_ids_update: The pm board id is 3448-0000-200
[0002.357] Adding plugin-manager/ids/3448-0000-200=/i2c@7000c500:module@0x50
[0002.363] pm_ids_update: pm id update successful
[0002.368] pm_ids_update: Updating 3,ae, size 256, type 0
[0002.398] pm_ids_update: The pm board id is 3449-0000-200
[0002.404] Adding plugin-manager/ids/3449-0000-200=/i2c@7000c500:module@0x57
[0002.411] pm_ids_update: pm id update successful
[0002.442] Add serial number:0421119024246 as DT property
[0002.449] Applying platform configs
[0002.456] platform-init is not present. Skipping
[0002.461] calling apps_init()
[0002.466] Couldn't find GPT header
[0002.471] Proceeding to Cold Boot
[0002.474] starting app android_boot_app
[0002.478] Device state: unlocked
[0002.481] display console init
[0002.489] could not find regulator
[0002.493] hdmi cable connected
[0002.508] edid read success
[0002.523] edid DT entry for leds-pwm not found
r[0002.531] ead success
[0002.533] width = 640, height = 480, frequency = 25174825
[0002.539] width = 640, height = 480, frequency = 25174825
[0002.544] width = 640, height = 480, frequency = 25174825
[0002.549] width = 640, height = 480, frequency = 25174825
[0002.555] width = 1920, height = 1080, frequency = 148500000
[0002.560] width = 720, height = 480, frequency = 27000000
[0002.566] width = 1920, height = 1080, frequency = 148351648
[0002.571] width = 1920, height = 1080, frequency = 148351648
[0002.577] width = 1280, height = 720, frequency = 74175824
[0002.583] width = 1280, height = 720, frequency = 74175824
[0002.588] width = 720, height = 480, frequency = 26973026
[0002.593] width = 720, height = 576, frequency = 26973026
[0002.599] width = 720, height = 480, frequency = 26973026
[0002.604] width = 720, height = 576, frequency = 26973026
[0002.610] width = 640, height = 480, frequency = 25174825
[0002.615] Best mode Width = 1920, Height = 1080, freq = 148351648
[0002.623] tmds-config node not found
[0002.627] pmc_set_io_pad_voltage: Error -2 retrieving platform-io-pad-voltagepropsetting 'avdd-io-hdmi-dp' regulator to 1050000 micro volts
[0002.642] setting 'vdd-1v8' regulator to 1800000 micro volts
[0002.649] could not find regulator
[0002.652] could not find regulator
[0002.656] could not find regulator
[0002.684] using default cmu settings
[0002.688] dc_hdmi_enable, starting HDMI initialisation
[0002.694] dc_hdmi_enable, HDMI initialisation complete
[0002.699] list and configure display window
[0002.708] display console init completed
[0002.719] subnode volume_up is not found !
[0002.723] subnode back is not found !
[0002.726] subnode volume_down is not found !
[0002.731] subnode menu is not found !
[0002.734] Gpio keyboard init success
[0002.815] found decompressor handler: lz4-legacy
[0002.829] decompressing blob (type 1)...
[0002.899] load_bmp_blob: panelresolution=1080 type=3
[0002.974] decompressor handler not found
[0002.977] load_firmware_blob: Firmware blob loaded, entries=2
[0002.983] XUSB blob version 0 size 124416 @ 0x934ae28c
[0002.989] -------> se_aes_verify_sbk_clear: 747
[0002.994] se_aes_verify_sbk_clear: Error
[0002.998] SE operation failed
[0003.000] bl_battery_charging: connected to external power supply
[0003.013] device_query_partition_size: failed to open partition spiflash0:MSC !
[0003.020] MSC Partition not found
[0003.026] device_query_partition_size: failed to open partition spiflash0:USP !
[0003.033] USP partition read failed!
[0003.037] blob_init: blob-partition USP header read failed
[0003.042] android_boot Unable to update recovery partition
[0003.048] kfs_getpartname: name = LNX
[0003.051] Loading kernel from LNX
[0003.061] Found 19 BFS partitions in "spiflash0"
[0003.380] load kernel from storage
[0003.385] decompressor handler not found
[0003.650] Successfully loaded kernel and ramdisk images
[0003.655] board ID = D78, board SKU = 0
[0003.660] sdmmc node status = okay
[0003.663] sdcard instance = 0
[0003.666] sdcard gpio handle 0x5b
[0003.669] sdcard gpio pin 0xc9
[0003.672] sdcard gpio flags 0x0
[0003.675] vmmc-supply 0x9e
[0003.678] cd_gpio_pin = 201
[0003.680] pin_state = 0
[0003.683] Found sdcard
[0003.685] SD-card IS present ...
[0003.688] load_and_boot_kernel: SD card detected OK
[0003.694] load_bmp_blob: panelresolution=1080 type=3
[0004.188] display bmp image done
[0004.191] NCK carveout not present
[0004.194] Skipping dts_overrides
[0004.197] NCK carveout not present
[0004.207] Find /i2c@7000c000's alias i2c0
[0004.211] get eeprom at 1-a0, size 256, type 0
[0004.220] Find /i2c@7000c500's alias i2c2
[0004.224] get eeprom at 3-a0, size 256, type 0
[0004.228] get eeprom at 3-ae, size 256, type 0
[0004.233] pm_ids_update: Updating 1,a0, size 256, type 0
[0004.238] I2C slave not started
[0004.241] I2C write failed
[0004.244] Writing offset failed
[0004.247] eeprom_init: EEPROM read failed
[0004.251] pm_ids_update: eeprom init failed
[0004.255] pm_ids_update: Updating 3,a0, size 256, type 0
[0004.285] pm_ids_update: The pm board id is 3448-0000-200
[0004.292] Adding plugin-manager/ids/3448-0000-200=/i2c@7000c500:module@0x50
[0004.300] pm_ids_update: pm id update successful
[0004.305] pm_ids_update: Updating 3,ae, size 256, type 0
[0004.335] pm_ids_update: The pm board id is 3449-0000-200
[0004.341] Adding plugin-manager/ids/3449-0000-200=/i2c@7000c500:module@0x57
[0004.349] pm_ids_update: pm id update successful
[0004.379] eeprom_get_mac: EEPROM invalid MAC address (all 0xff)
[0004.385] shim_eeprom_update_mac:267: Failed to update 0 MAC address in DTB
[0004.393] eeprom_get_mac: EEPROM invalid MAC address (all 0xff)
[0004.399] shim_eeprom_update_mac:267: Failed to update 1 MAC address in DTB
[0004.407] updating /chosen/nvidia,ethernet-mac node 00:04:4b:e4:0a:2c
[0004.414] Plugin Manager: Parse ODM data 0x000a4000
[0004.426] shim_cmdline_install: /chosen/bootargs: earlycon=uart8250,mmio32,0x70006000
[0004.434] Add serial number:0421119024246 as DT property
[0004.443] "bpmp" doesn't exist, creating
[0004.449] Updated bpmp info to DTB
[0004.454] Updated initrd info to DTB
[0004.457] "proc-board" doesn't exist, creating
[0004.463] Updated board info to DTB
[0004.467] "pmu-board" doesn't exist, creating
[0004.473] Updated board info to DTB
[0004.476] "display-board" doesn't exist, creating +-----------------------------+
[0004.482] Updated board info to DTB | |
[0004.485] "reset" doesn't exist, creating | Cannot open /dev/ttyUSB0! |
[0004.490] Updated reset info to DTB | |
[0004.493] Cmdline: tegraid=21.1.2.0.0 ddr_die=4096M@20+-----------------------------+resize usb_port_owner_info=0 lane_owner_info=0 emc_ma
[0004.533] DTB cmdline: earlycon=uart8250,mmio32,0x70006000
[0004.538] boot image cmdline: root=/dev/mmcblk0p1 rw rootwait rootfstype=ext4 console=ttyS0,115200n8 console=tty0 fbcon=map:0 net.ifnames=
[0004.551] Updated bootarg info to DTB
[0004.555] Adding uuid 000000016441d5c8080000000d068240 to DT
[0004.561] Adding eks info 0 to DT
[0004.566] WARNING: Failed to pass NS DRAM ranges to TOS, err: -7
[0004.572] Updated memory info to DTB
[0004.578] Updated system-lp0-disable info to DTB
[0004.586] set vdd_core voltage to 1075 mv
[0004.590] setting 'vdd-core' regulator to 1075000 micro volts
[0004.596] Found secure-pmc; disable BPMP
U-Boot 2020.04-g6b630d64fd (Feb 19 2021 - 08:37:46 -0800)
SoC: tegra210
Model: NVIDIA Jetson Nano Developer Kit
Board: NVIDIA P3450-0000
DRAM: 4 GiB
MMC: sdhci@700b0000: 1, sdhci@700b0600: 0
Loading Environment from SPI Flash... SF: Detected mx25u3235f with page size 256 Bytes, erase size 4 KiB, total 4 MiB
*** Warning - bad CRC, using default environment
In: serial
Out: serial
Err: serial
Net: No ethernet found.
Hit any key to stop autoboot: 0
switch to partitions #0, OK
mmc1 is current device
Scanning mmc 1:1...
Found /boot/extlinux/extlinux.conf
Retrieving file: /boot/extlinux/extlinux.conf
845 bytes read in 27 ms (30.3 KiB/s)
1: primary kernel
Retrieving file: /boot/initrd
7159841 bytes read in 331 ms (20.6 MiB/s)
Retrieving file: /boot/Image
34338824 bytes read in 1509 ms (21.7 MiB/s)
append: tegraid=21.1.2.0.0 ddr_die=4096M@2048M section=512M memtype=0 vpr_resize usb_port_owner_info=0 lane_owner_info=0 emc_max_dvfs=0 tou
## Flattened Device Tree blob at 83100000
Booting using the fdt blob at 0x83100000
ERROR: reserving fdt memory region failed (addr=0 size=0)
ERROR: reserving fdt memory region failed (addr=0 size=0)
Using Device Tree in place at 0000000083100000, end 000000008317e68d
copying carveout for /host1x@50000000/dc@54200000...
copying carveout for /host1x@50000000/dc@54240000...
Starting kernel ...
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 4.9.201-tegra (buildbrain@mobile-u64-5294-d8000) (gcc version 7.3.1 20180425 [linaro-7.3-2018.05 revision d2911
[ 0.000000] Boot CPU: AArch64 Processor [411fd071]
[ 0.000000] OF: fdt:memory scan node memory@80000000, reg size 32,
[ 0.000000] OF: fdt: - 80000000 , 7ee00000
[ 0.000000] OF: fdt: - 100000000 , 7f200000
[ 0.000000] Found tegra_fbmem: 00800000@92ca9000
[ 0.000000] earlycon: uart8250 at MMIO32 0x0000000070006000 (options '')
[ 0.000000] bootconsole [uart8250] enabled
[ 1.165010] tegradc tegradc.1: dpd enable lookup fail:-19
I do not know what is wrong, I was recently working with a CSI camera, but I’ve removed it so that now I just have serial, power and HDMI connected.