Jetson Nano 4gb Developer Kit power led on but wont start

Hi, I have a Jetson Nano 4gb developer kit rev B01 which is stuck on when powering on. The power led is on but nothing is displayed on my monitor. It seems that there is no power to the keyboard and mouse as well. This is the message I received when I connect it to a serial console when turning on the Jetson Nano:

[0000.163] [L4T TegraBoot] (version 00.00.2018.01-l4t-e82258de)
[0000.168] Processing in cold boot mode Bootloader 2
[0000.173] A02 Bootrom Patch rev = 1023
[0000.177] Power-up reason: pmc por
[0000.180] No Battery Present
[0000.182] pmic max77620 reset reason
[0000.186] pmic max77620 NVERC : 0x40
[0000.189] RamCode = 0
[0000.191] Platform has DDR4 type RAM
[0000.195] max77620 disabling SD1 Remote Sense
[0000.199] Setting DDR voltage to 1125mv
[0000.203] Serial Number of Pmic Max77663: 0x2a1be7
[0000.211] Entering ramdump check
[0000.214] Get RamDumpCarveOut = 0x0
[0000.217] RamDumpCarveOut=0x0, RamDumperFlag=0xe59ff3f8
[0000.222] Last reboot was clean, booting normally!
[0000.227] Sdram initialization is successful
[0000.231] SecureOs Carveout Base=0x00000000ff800000 Size=0x00800000
[0000.237] Lp0 Carveout Base=0x00000000ff780000 Size=0x00001000
[0000.242] BpmpFw Carveout Base=0x00000000ff700000 Size=0x00080000
[0000.248] GSC1 Carveout Base=0x00000000ff600000 Size=0x00100000
[0000.254] GSC2 Carveout Base=0x00000000ff500000 Size=0x00100000
[0000.260] GSC4 Carveout Base=0x00000000ff400000 Size=0x00100000
[0000.266] GSC5 Carveout Base=0x00000000ff300000 Size=0x00100000
[0000.272] GSC3 Carveout Base=0x000000017f300000 Size=0x00d00000
[0000.288] RamDump Carveout Base=0x00000000ff280000 Size=0x00080000
[0000.294] Platform-DebugCarveout: 0
[0000.297] Nck Carveout Base=0x00000000ff080000 Size=0x00200000
[0000.303] Non secure mode, and RB not enabled.
[0000.307] BoardID = 3448, SKU = 0x0
[0000.311] QSPI-ONLY: SkipQspiOnlyFlag = 0
[0000.314] Nano-SD: checking PT table on QSPI …
[0000.319] Read PT from (2:0)
[0000.334] Using BFS PT to query partitions
[0000.338] PT: Partition TBC NOT found !
[0000.342] Warning: Find Partition via PT Failed
[0000.346] BoardID = 3448, SKU = 0x0
[0000.349] QSPI-ONLY: SkipQspiOnlyFlag = 0
[0000.353] Nano-SD: checking PT table on QSPI …
[0000.358] PT: Partition TBC NOT found !
[0000.361] Warning: Find Partition via PT Failed
[0000.366] Error is 1

I tried to flash the device with Jetpack 4.5.1 using the SDK Manager as well. but it remains stuck at 99.0% when flashing the device.

Is there any other method that can help resolve this issue?

Has this device been successfully flashed before?
Adequate power supply? Maybe remove all USB devices before flashing?
Try different USB cable to host?
When you flashed using, did you use jetson-nano-qspi-sd as the board id?

Some users also have such error reported before. The only solution to fix this issue is through the sdkmanager.

As for your sdkmanager stuck issue, please check this page and see if this is really due to flash, or just sdk installation failure.

Yes this device has been successfully flashed before. Initially it was flashed using balenaEtcher. Everything was ok for a while. The device was powered off for around a week before using it again and it was at this time where I encountered this issue.

Alright, I will try to flash the device without any USB device connected to it.

Regarding using, that is correct. I used jetson-nano-qspi-sd as the board id.

Alright. Noted on this. I will check out the link to find out more.

An update on the situation, I managed to flash the device successfully using the method. After going through the general debug link provided by @WayneWWW, I saw that ssh was required and it was disabled on my linux host. After enabling ssh, the flashing procedure went smoothly and after that I am able to access the device again. Thank you for the help! I really appreciate it.

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