# Jetson Nano 2 GB Developer Kit "PT: Partition TBC NOT found"

**URL:** <https://forums.developer.nvidia.com/t/jetson-nano-2-gb-developer-kit-pt-partition-tbc-not-found/175774>\
**Category:** Jetson Nano\
**Tags:** nano2gb, jetpack, boot\
**Created:** [April 20, 2021, 2:48pm UTC](https://forums.developer.nvidia.com/t/jetson-nano-2-gb-developer-kit-pt-partition-tbc-not-found/175774 "2021-04-20T14:48:38Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Eschaton](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@Eschaton](https://forums.developer.nvidia.com/u/Eschaton)\
**Post date:** [April 20, 2021, 2:48pm UTC](https://forums.developer.nvidia.com/t/jetson-nano-2-gb-developer-kit-pt-partition-tbc-not-found/175774/1 "2021-04-20T14:48:38Z")

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So I bought the 2GB Nano DevKit today and it worked fine the first time. I was trying to install the newest JetPack for the 2 GB version but the installer window disappeared at the last step before I could start installation, so I just disconnected the power. It rebooted fine but I ran out of time then so I had to power down the board again. After that it stopped booting at all - constant black screen.

I reflashed the SD card (SanDisk Ultra 32 GB) 5 times already - 3 times using Etcher and 2 times using Win32 Disk Imager. Also tried another SD card twice (random 16 GB Kioxia). Nothing works. I’m using a 3.1A 5V USB-C power supply.

Here’s the serial console output:

> .  
> [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 = 1  
> [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: 0x172aed  
> [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=0x00000000ff800000 Size=0x00000000  
> [0000.242] BpmpFw Carveout Base=0x00000000ff800000 Size=0x00000000  
> [0000.248] GSC1 Carveout Base=0x00000000ff800000 Size=0x00000000  
> [0000.254] Resize the SecureOs Carveout to 0x00100000  
> [0000.259] GSC2 Carveout Base=0x00000000ff900000 Size=0x00100000  
> [0000.265] GSC4 Carveout Base=0x00000000ff800000 Size=0x00000000  
> [0000.271] GSC5 Carveout Base=0x00000000ff800000 Size=0x00000000  
> [0000.276] GSC3 Carveout Base=0x00000000bf800000 Size=0x00200000  
> [0000.282] RamDump Carveout Base=0x0000000000000000 Size=0x00000000  
> [0000.288] Platform-DebugCarveout: 0  
> [0000.291] Nck Carveout Base=0x00000000ff800000 Size=0x00000000  
> [0000.297] Non secure mode, and RB not enabled.  
> [0000.301] BoardID = 3448, SKU = 0x3  
> [0000.305] QSPI-ONLY: SkipQspiOnlyFlag = 0  
> [0000.308] Nano-SD: checking PT table on QSPI …  
> [0000.313] Read PT from (2:0)  
> [0000.328] Using BFS PT to query partitions  
> [0000.332] PT: Partition TBC NOT found !  
> [0000.336] Warning: Find Partition via PT Failed  
> [0000.340] BoardID = 3448, SKU = 0x3  
> [0000.343] QSPI-ONLY: SkipQspiOnlyFlag = 0  
> [0000.347] Nano-SD: checking PT table on QSPI …  
> [0000.352] PT: Partition TBC NOT found !  
> [0000.355] Warning: Find Partition via PT Failed  
> [0000.360] Error is 1

Did I break the board somehow? Is there any fix possible?

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**Author:** ![WayneWWW](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/waynewww/32/14043_2.png) [@WayneWWW](https://forums.developer.nvidia.com/u/WayneWWW)\
**Post date:** [April 21, 2021, 2:32am UTC](https://forums.developer.nvidia.com/t/jetson-nano-2-gb-developer-kit-pt-partition-tbc-not-found/175774/4 "2021-04-21T02:32:33Z")

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No, you are not breaking the board.

Please use sdkmanager to flash the board and it will be fine. This is a known issue.

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**Author:** ![nadeemm](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/nadeemm/32/367020_2.png) [@nadeemm](https://forums.developer.nvidia.com/u/nadeemm)\
**Post date:** [October 15, 2021, 3:59am UTC](https://forums.developer.nvidia.com/t/jetson-nano-2-gb-developer-kit-pt-partition-tbc-not-found/175774/6 "2021-10-15T03:59:26Z")

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Closed on October 15, 2021, 3:59am UTC