Jetson nano boot failed

Hi,my nano module failed to startup,and i get the log from uart as follows:

[0000.231] [L4T TegraBoot] (version 00.00.2018.01-l4t-c536fca9)
[0000.236] Processing in cold boot mode Bootloader 2
[0000.241] A02 Bootrom Patch rev = 1023
[0000.244] Power-up reason: pmc por
[0000.248] No Battery Present
[0000.250] pmic max77620 reset reason
[0000.254] pmic max77620 NVERC : 0x40
[0000.257] RamCode = 0
[0000.259] Platform has DDR4 type RAM
[0000.263] max77620 disabling SD1 Remote Sense
[0000.267] Setting DDR voltage to 1125mv
[0000.271] Serial Number of Pmic Max77663: 0x2f1ced
[0000.278] Entering ramdump check
[0000.281] Get RamDumpCarveOut = 0x0
[0000.285] RamDumpCarveOut=0x0, RamDumperFlag=0xe59ff3f8
[0000.290] Last reboot was clean, booting normally!
[0000.294] Sdram initialization is successful
[0000.298] SecureOs Carveout Base=0x00000000ff800000 Size=0x00800000
[0000.305] Lp0 Carveout Base=0x00000000ff780000 Size=0x00001000
[0000.310] BpmpFw Carveout Base=0x00000000ff700000 Size=0x00080000
[0000.316] GSC1 Carveout Base=0x00000000ff600000 Size=0x00100000
[0000.322] GSC2 Carveout Base=0x00000000ff500000 Size=0x00100000
[0000.328] GSC4 Carveout Base=0x00000000ff400000 Size=0x00100000
[0000.334] GSC5 Carveout Base=0x00000000ff300000 Size=0x00100000
[0000.340] GSC3 Carveout Base=0x000000017f300000 Size=0x00d00000
[0000.356] RamDump Carveout Base=0x00000000ff280000 Size=0x00080000
[0000.362] Platform-DebugCarveout: 0
[0000.365] Nck Carveout Base=0x00000000ff080000 Size=0x00200000
[0000.371] Non secure mode, and RB not enabled.
[0000.387] Csd NumOfBlocks=0
[0000.579] *** Booting BFS0.
[0000.582] Read PT from (0:3)
[0000.588] Using BFS PT to query partitions
[0000.592] PT: Partition LNX NOT found !
[0001.175] *** Booting KFS0.
[0001.178] Read GPT from (0:3)
[0001.185] Using GPT Primary to query partitions
[0001.191] Loading Tboot-CPU binary
[0001.198] Verifying TBC in OdmNonSecureSBK mode
[0001.208] Bootloader load address is 0xa0000000, entry address is 0xa0000258
[0001.215] Bootloader downloaded successfully.
[0001.219] Downloaded Tboot-CPU binary to 0xa0000258
[0001.224] MAX77620_GPIO5 configured
[0001.227] CPU power rail is up
[0001.230] CPU clock enabled
[0001.234] Performing RAM repair
[0001.237] Updating A64 Warmreset Address to 0xa00002e9
[0001.242] Loading NvTbootBootloaderDTB
[0001.259] Verifying NvTbootBootloaderDTB in OdmNonSecureSBK mode
[0001.333] Bootloader DTB Load Address: 0x83000000
[0001.337] Loading NvTbootKernelDTB
[0001.354] Verifying NvTbootKernelDTB in OdmNonSecureSBK mode
[0001.427] Kernel DTB Load Address: 0x83100000
[0001.433] Loading cboot binary
[0001.444] Verifying EBT in OdmNonSecureSBK mode
[0001.485] Bootloader load address is 0x92c00000, entry address is 0x92c00258
[0001.492] Bootloader downloaded successfully.
[0001.497] PT: Partition NCT NOT found !
[0001.501] Warning: Find Partition via PT Failed
[0001.505] Next binary entry address: 0x92c00258
[0001.510] BoardId: 3448
[0001.514] Overriding pmu board id with proc board id
[0001.519] Display board id is not available
[0001.531] Verifying SC7EntryFw in OdmNonSecureSBK mode
[0001.588] /bpmp deleted
[0001.590] SC7EntryFw header found loaded at 0xff700000
[0001.786] OVR2 PMIC
[0001.788] Bpmp FW successfully loaded
[0001.793] WB0 init successfully at 0xff780000
[0001.797] Set NvDecSticky Bits
[0001.801] GSC2 address ff53fffc value c0edbbcc
[0001.807] GSC MC Settings done
[0001.810] TOS Image length 53680
[0001.813] Monitor size 53680
[0001.816] OS size 0
[0001.822] Secure Os AES-CMAC Verification Success!
[0001.826] TOS image cipher info: plaintext
[0001.830] Loading and Validation of Secure OS Successful
[0001.846] SC7 Entry Firmware - 0xff700000, 0x4000
[0001.851] NvTbootPackSdramParams: start.
[0001.856] NvTbootPackSdramParams: done.
[0001.859] Tegraboot started after 160456 us
[0001.863] Basic modules init took 1400360 us
[0001.868] Sec Bootdevice Read Time = 542 ms, Read Size = 14471 KB
[0001.873] Sec Bootdevice Write Time = 0 ms, Write Size = 0 KB
[0001.879] Next stage binary read took 7373 us
[0001.883] Carveout took -19601 us
[0001.886] CPU initialization took 355838 us
[0001.890] Total time taken by TegraBoot 1743970 us

[0001.895] Starting CPU & Halting co-processor

64NOTICE: BL31: v1.3(release):de895fd9e
NOTICE: BL31: Built : 12:23:48, Oct 16 2020
Unhandled Exception in EL3.
x30 = 0x00000000ff803a54
x0 = 0x0000000000000000
x1 = 0x0000000000000002
x2 = 0x0000000000000080
x3 = 0x0000000000000080
x4 = 0x0040000000000000
x5 = 0x00000000ff703fff
x6 = 0x0000000000000020
x7 = 0x00000000ff80d000
x8 = 0x00000000ff703fff
x9 = 0x00000000ff81ffff
x10 = 0x0000000000000000
x11 = 0x0000000000000000
x12 = 0x13528443bc270030
x13 = 0xbefe7ff5dfd6775a
x14 = 0xf5936c738144bea5
x15 = 0xfffbffffa08e2424
x16 = 0xe295024a247e5606
x17 = 0x00000000ff807fdc
x18 = 0x0000000000000011
x19 = 0x00000000ff80c7f8
x20 = 0x0000000000000005
x21 = 0x0000000000000000
x22 = 0x00000000ff814e28
x23 = 0x00000000ff80f000
x24 = 0x00000000ff80b496
x25 = 0x0000000000000000
x26 = 0x00000000ff80c7f8
x27 = 0x0000000000000001
x28 = 0x0000000000000000
x29 = 0x00000000ff80d550
scr_el3 = 0x0000000000000238
sctlr_el3 = 0x0000000000cd183f
cptr_el3 = 0x0000000000000000
tcr_el3 = 0x000000008081351d
daif = 0x00000000000003c0
mair_el3 = 0x00000000004404ff
spsr_el3 = 0x00000000600002cc
elr_el3 = 0x0000000000000000
ttbr0_el3 = 0x00000000ff814b00
esr_el3 = 0x0000000086000005
far_el3 = 0x0000000000000000
spsr_el1 = 0x0000000000000010
elr_el1 = 0xfff17dfdeff376ff
spsr_abt = 0x0000000000000010
spsr_und = 0x0000000000000010
spsr_irq = 0x0000000000000010
spsr_fiq = 0x0000000000000010
sctlr_el1 = 0x0000000000c50838
actlr_el1 = 0x0000000000000000
cpacr_el1 = 0x0000000000300000
csselr_el1 = 0x0000000000000000
sp_el1 = 0x849212e8bbae1b04
esr_el1 = 0x0000000000000000
ttbr0_el1 = 0x0000000000000000
ttbr1_el1 = 0x0000000000000000
mair_el1 = 0x44e048e000098aa4
amair_el1 = 0x0000000000000000
tcr_el1 = 0x0000000000000000
tpidr_el1 = 0x0000000000000000
tpidr_el0 = 0x0000000000000000
tpidrro_el0 = 0x0000000000000000
dacr32_el2 = 0x0000000055555555
ifsr32_el2 = 0x0000000000000000
par_el1 = 0x0000000000000000
mpidr_el1 = 0x0000000080000000
afsr0_el1 = 0x0000000000000000
afsr1_el1 = 0x0000000000000000
contextidr_el1 = 0x0000000000000000
vbar_el1 = 0x0000000000000000
cntp_ctl_el0 = 0x0000000000000000
cntp_cval_el0 = 0x0000000000000000
cntv_ctl_el0 = 0x0000000000000000
cntv_cval_el0 = 0x0000000000000000
cntkctl_el1 = 0x0000000000000002
fpexc32_el2 = 0x0000000000000700
sp_el0 = 0x00000000ff80d550
isr_el1 = 0x0000000000000000
cpuectlr_el1 = 0x0000001b00000047
cpumerrsr_el1 = 0x0000000000000000
l2merrsr_el1 = 0x0000000000000000
gicc_hppir = 0x00000000000003ff
gicc_ahppir = 0x00000000000003ff
gicc_ctlr = 0x00000000000001eb
gicd_ispendr regs (Offsets 0x200 - 0x278)
Offset: value
0000000000000200: 0x0000000000000000
0000000000000204: 0x0000000000000000
0000000000000208: 0x0000000000000000
000000000000020c: 0x0000000000000000
0000000000000210: 0x0000000000000000
0000000000000214: 0x0000000000000000
0000000000000218: 0x0000000000000000
000000000000021c: 0x0000000000000000
0000000000000220: 0x0000000000000000
0000000000000224: 0x0000000000000000
0000000000000228: 0x0000000000000000
000000000000022c: 0x0000000000000000
0000000000000230: 0x0000000000000000
0000000000000234: 0x0000000000000000
0000000000000238: 0x0000000000000000
000000000000023c: 0x0000000000000000
0000000000000240: 0x0000000000000000
0000000000000244: 0x0000000000000000
0000000000000248: 0x0000000000000000
000000000000024c: 0x0000000000000000
0000000000000250: 0x0000000000000000
0000000000000254: 0x0000000000000000
0000000000000258: 0x0000000000000000
000000000000025c: 0x0000000000000000
0000000000000260: 0x0000000000000000
0000000000000264: 0x0000000000000000
0000000000000268: 0x0000000000000000
000000000000026c: 0x0000000000000000
0000000000000270: 0x0000000000000000
0000000000000274: 0x0000000000000000
0000000000000278: 0x0000000000000000
000000000000027c: 0x0000000000000000

It can startup before,i don’t know what happened.
Help me please!
thanks

@tasawen please provide further background information. Is this a custom carrier board?

hi mike_nv, it is custom carrier board. it is good before.

hi @mike_nv I put the nano module on the nvidia carrier board, get the same result.

Hi @tasawen please flash the lastest L4T onto the module on the NVidia carrier board and let me know if you are able to boot up with a default setting. From there we can start refining our search for potential causes.

Hi @mike_nv i flash the lastest L4T onto the module on the NVidia carrier board, it can boot up now.
But i still don’t know the root cause of the problem.