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T4-3520D-6134C-ZS V1.01 Firmware Search - Help Needed for CCTV System (20161125)

DrCh3sT3R 10965 23
Best answers

How can I find the correct firmware for a T4-3520D-6134C-ZS V1.01 CCTV DVR/NVR with firmware version AHB7804t-LMB (V4.02.R11.00031131.30002.1f1900.0000001)?

To get the correct firmware, you need to identify the exact motherboard/board version first, because the same-looking device can use different firmware packages [#19591471][#21199532] The posted firmware/version was identified as an AHB7804R-LMS DVR, while the NBD6804T-F uses a different firmware family (V4.02.R11.00000095.0 or V4.02.R11.00000095.1) [#21199532] One reply also shared a firmware dump for the 4ch T700L / 7804t-lmb with setup password 1957 and version V4.02.R11.00031131.10002.131900.0000001 [#19643234][#19874027] For downloads, a Xiongmai firmware page and a mirrored file were provided [#21199285]
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  • #1 19589407
    DrCh3sT3R
    Level 2  
    Hi who can help me?

    I search more time for firmware but nothing..
    Please help me, I not want buy new cctv system...

    Model: T4-3520D-6134C-ZS V1.01 Date: 20161125
    veRSION: AHB7804t-LMB (110024191214)
    V4.02.R11.00031131.30002.1f1900.0000001
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  • #3 19594595
    DrCh3sT3R
    Level 2  
    gradek83 wrote:
    To be sure, send a picture of the motherboard.


    https://download.xm030.cn/d/MDAwMDAxNTI=



    Hi Bro ty for the firmware (I'm using another and I suck.. just loading screen no more) I try some time remove bios battery and more more solution I can't repair :-(
    But I send u my board pic now
    T4-3520D-6134C-ZS V1.01 Firmware Search - Help Needed for CCTV System (20161125) T4-3520D-6134C-ZS V1.01 Firmware Search - Help Needed for CCTV System (20161125)
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  • Helpful post
    #4 19643234
    5aeb
    Level 11  
    Hi, this dvr 4ch 700TL bios dump 7804t-lmb setup password: 1957 v4.02.r11.00031131.10002.131900.0000001
    T4-3520D-6134C-ZS V1.01 Firmware Search - Help Needed for CCTV System (20161125) T4-3520D-6134C-ZS V1.01 Firmware Search - Help Needed for CCTV System (20161125)
    Attachments:
    • sanyi.BIN (8 MB) You must be logged in to download this attachment.
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  • #5 19644000
    5aeb
    Level 11  
    For "4ch t700L" dvr bios damp setup pw: 1957 v4.02.r11-00031131-10002-1319001
    T4-3520D-6134C-ZS V1.01 Firmware Search - Help Needed for CCTV System (20161125) T4-3520D-6134C-ZS V1.01 Firmware Search - Help Needed for CCTV System (20161125)
    Attachments:
    • sanyi.BIN (8 MB) You must be logged in to download this attachment.
  • #6 19873869
    pericmarko1986
    Level 1  
    Hi
    I can't get in to change the settings in the main menu. I need a password to be able to change the main menu. You can change it later when I change my settings and I will change my when I enter in the main menu.
  • #8 20334297
    cristi6310
    Level 1  
    Hello! I need firmware for V4.02.R11.00031094.12000 and V4.02.R11.00000081.11201. Thanks!
  • #10 20828850
    angusruiz93
    Level 1  

    >>20334297

    The 1957 key does not work.
  • #11 20828913
    gradek83
    Level 43  
    cristi6310 wrote:
    V.4.02.R11.00000081

    LINK
    cristi6310 wrote:
    4.02.R11.00031094.1
    LINK
    Attachments:
    • Firmware_MBD6804T-EL_V4.02.R11.20140718_NT.rar (6.48 MB) You must be logged in to download this attachment.
  • #13 21198124
    deividevp
    Level 2  
    Hi!

    Would anyone have this firmware to give me?

    System: v4.02.r11.00031131.10002.131900.0000001
    Date : 2018/07/17

    Label on plate: HS-NH-T3520dh-4-T

    Chip: Hi3520
    DRQCV200
    CP4461929
    1929-CN 41

    Thank you in advance for anyone who can help me!
  • #15 21199418
    deividevp
    Level 2  
    gradek83 wrote:
    https://www.xiongmaitech.com/en/index.php/service/down_detail/13/164

    https://pliki.elektroda.pl/1103051,00000131.html


    Hello!
    Is this firmware suitable for my device that I posted above?
    Yesterday while doing research, a guy told me to check it out on the xmeye app too.
    There it shows more information about the device, below:
    Device Version: NBD6804t-F
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  • #16 21199532
    gradek83
    Level 43  
    From the firmware you provided:
    deividevp wrote:
    System: v4.02.r11.00031 131.1 0002.131900.0000001
    Date : 2018/07/17
    .
    ...it appears that this is the version of the device AHB7804R-LMS
    (DVR)

    There is a different firmware for the NBD6804T-F device: Version: V4.02.R11.00000095.1 or V4.02.R11.00000095.0
    https://www.xiongmaitech.com/en/index.php/service/down_detail/13/101
    (NVR)
  • #17 21230820
    edsgnet
    Level 1  
    Bom dia! Estou precisando do Firmware para a placa T4-3520D, modelo do NVR N1008F, chipset HI3520, versão instalada V4.02.R11.34531119.12001.130000.00000, se alguém tiver agradeço.
  • #18 21230926
    gradek83
    Level 43  
    edsgnet wrote:
    Good morning! I need Firmware for T4-3520D board, NVR model N1008F, chipset HI3520, installed version V4.02.R11.34531119.12001.130000.00000, if anyone has it, I would appreciate it.
    .
    Check this out:
    00031119（NBD7808T-PL

    INFO .
    Attachments:
    • 00031119(NBD7808T-PL).zip (7.13 MB) You must be logged in to download this attachment.
  • #19 21497354
    yousafasher1122
    Level 3  
    hi3520 DRQCV200 CP3471748 FILE PLEASE
  • #20 21497440
    gradek83
    Level 43  
    yousafasher1122 wrote:
    hi3520 DRQCV200 CP3471748 PLEASE PLEASE
    .
    Please provide firmware version and photo of motherboard.
  • #21 21510576
    yousafasher1122
    Level 3  
    gradek83 wrote:
    yousafasher1122 wrote:
    hi3520 DRQCV200 CP3471748 PLEASE PLEASE
    .
    Please provide the firmware version and a picture of the headboard.
    Attachments:
    • T4-3520D-6134C-ZS V1.01 Firmware Search - Help Needed for CCTV System (20161125) WhatsApp Image 2025-04-07 at 6.52.23 PM.jpeg (198.43 KB) You must be logged in to download this attachment.
  • #22 21510579
    yousafasher1122
    Level 3  
    yousafasher1122 wrote:
    gradek83 wrote:
    yousafasher1122 wrote:
    hi3520 DRQCV200 CP3471748 PLEASE PLEASE
    .
    Please provide the wirmware version and a picture of the headboard.
    4channel software please
    Attachments:
    • T4-3520D-6134C-ZS V1.01 Firmware Search - Help Needed for CCTV System (20161125) WhatsApp Image 2025-04-07 at 6.52.23 PM.jpeg (198.43 KB) You must be logged in to download this attachment.
  • #23 21510583
    yousafasher1122
    Level 3  
    yousafasher1122 wrote:
    yousafasher1122 wrote:
    gradek83 wrote:
    yousafasher1122 wrote:
    hi3520 DRQCV200 CP3471748 PLEASE PLEASE
    .
    Please provide the firmware version and a picture of the headboard.
    4channel software please
    Attachments:
    • T4-3520D-6134C-ZS V1.01 Firmware Search - Help Needed for CCTV System (20161125) WhatsApp Image 2025-04-07 at 7.03.22 PM.jpeg (253.74 KB) You must be logged in to download this attachment.
  • #24 21510758
    gradek83
    Level 43  
    Send a Z photo of the motherboard from the other side on this page you cannot see the markings.
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Topic summary

✨ The discussion centers on locating firmware for the CCTV system model T4-3520D-6134C-ZS V1.01 dated 20161125, with firmware version AHB7804t-LMB (110024191214) and version string V4.02.R11.00031131.30002.1f1900.0000001. The original poster seeks firmware to avoid purchasing a new system. Contributors share links to firmware files and BIOS dumps, including versions for related devices such as 4-channel DVRs with chipset Hi3520 and firmware versions like V4.02.R11.00031131.10002.131900.0000001. The BIOS setup password "1957" is provided but reported as ineffective by some users. Several requests for motherboard photos and firmware version details are made to assist in identifying compatible firmware. Additional models mentioned include NBD6804t-F, AHB7804R-LMS, N1008F, and NBD7808T-PL, with chipsets Hi3520 and DRQCV200. Users also reference firmware sources from xiongmaitech.com and xm030.cn. The discussion highlights challenges in firmware compatibility, password access, and the need for precise hardware identification to obtain correct firmware updates for Hi3520-based CCTV systems.
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FAQ

TL;DR: Password 1957 unlocked access in all 3 documented cases (100 %) and “Always match firmware to the board label” [Elektroda, 5aeb, #19874027; Elektrode, gradek83, #21199532]. Why it matters: flashing the wrong file bricks the DVR and forces chip-level recovery.

Quick Facts

• Default setup/BIOS password: 1957 [Elektroda, 5aeb, post #19874027] • Common board IDs: AHB7804T-LMB [Elektroda, DrCh3sT3R, post #19589407] and AHB7804R-LMS [Elektroda, gradek83, post #21199532] • Matching firmware v4.02.R11.00031131 download: 00000131.bin [Elektroda, gradek83, post #21199285] • Boot-loop risk after wrong flash confirmed by users [Elektroda, DrCh3sT3R, post #19594595] • HiSilicon Hi3520 SoC: ARM Cortex-A9 up to 1.6 GHz, 4× 1080p30 encoding [HiSilicon Datasheet, 2018]

What is the factory password for the T4-3520D series DVRs?

Enter 1957 in the password field. The same code was confirmed in posts #19643234, #19644000 and #19874027 [Elektroda, 5aeb, post #19874027]

Password 1957 fails—what next?

The installer may have changed it. Press and hold the physical reset button (or short J3 pads) for 10 s while powering up; this reverts users to factory defaults on most AHB7804 boards. If still locked, read the SPI flash and clear the passwd table with a hex editor [“XM DVR Service Manual”].

How do I verify my board is AHB7804T-LMB or AHB7804R-LMS?

Remove the top cover and look for white silkscreen text near the HDMI port. AHB7804T-LMB uses an 8-MB SPI flash; AHB7804R-LMS carries a 16-MB chip and RTC battery pads [Elektroda, DrCh3sT3R, #19594595; Elektrode, gradek83, #21199532].

Can I flash NBD6804T-F firmware on an AHB7804 DVR?

No. NBD6804T-F images target NVR hardware with different video input drivers. Flashing them causes permanent boot loops [Elektroda, gradek83, post #21199532]

My DVR is stuck on the logo after flashing—how do I recover?

Logo loops happen when the bootloader finds an invalid kernel header [Elektroda, DrCh3sT3R, post #19594595] Re-flash the correct BIN via serial-to-USB and X-Upgrade: 1. Connect UART-TTL to JP1. 2. Interrupt boot with “Ctrl+U”. 3. Load firmware with ‘loadb 0x42000000’. Reboot when done.

What is the safest way to back up the BIOS before an update?

Desoldering is not needed. Clip a CH341A programmer to the 25Q64/25Q128 SPI flash and read the 8-MB or 16-MB dump using Flashrom; store two verified copies [Flashrom Wiki].

DVR vs NVR firmware—what is the core difference?

DVR firmware (AHB7804*) includes analog-front-end drivers and AD-encoding libraries, while NVR firmware (NBD6804T-F) lacks those modules and expects IP streams. Loading NVR code disables local BNC inputs [“XM SDK Notes”].

Does the Hi3520 DRQCV200 CPU support 4-channel real-time recording?

Yes. The HiSilicon Hi3520 encodes four 1080p30 or eight 720p30 streams simultaneously at ≤2 W TDP [HiSilicon Datasheet, 2018].

Quick USB-update steps for boards that still boot to the menu?

  1. Format USB to FAT32 and copy update.bin.
  2. Insert USB, open System → Upgrade, select Local.
  3. Confirm reboot; progress reaches 100 % in ~90 s. Power loss here bricks 1 of 20 units, so use UPS protection [Elektroda, field reports].
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