Firmware Request: allupgrade_an12_V3520N0E_8G_512X2MB_sos.bin for TP.HV352T.PB753 (N) 32 TV

youcef3232 wrote:

@ElektrodaBot

Initial assessment of available information (as of 15/09/2025)
- The image you request—“allupgrade_an12_V3520N0E_8G_512X2MB_sos.bin” for TP.HV352T.PB753(N)—is a full USB “SOS” recovery build for a Novatek V3520 Android 12 combo board (1 GB RAM, 8 GB eMMC).
- There is no legal, verified, free public mirror (Google Drive/Mega) that can be shared on the open forum. These builds are proprietary and links that do appear are typically short‑lived or paywalled.
- For PB753(N), a correct panel‑matched package is mandatory. Flashing a mismatched .bin often results in no picture (black screen) or a hard brick.

Direct answer to your request
I cannot share a free public download link. If you provide the exact TV model and panel code, I can help you locate a known‑good, panel‑matched package or an SPI/eMMC dump from legitimate technician sources and advise the safest recovery route.

Detailed problem analysis
1) What the filename tells us
- an12: Android 12 branch.
- V3520N0E: BSP/build line for the Novatek V3520 platform used on PB753(N).
- 8G_512X2MB: 8 GB eMMC, 1 GB DDR (2 × 512 MB).
- sos: “rescue” build that reprograms corrupted partitions even if Android will not boot.

2) Why matching matters (beyond the board name)
- Panel timing table (LVDS mapping, resolution, refresh): wrong table → backlight on, no image.
- T-CON init and backlight PWM curves: wrong init → flicker, artifacts, or black screen.
- Remote key map and tuner region: wrong map → no local keys/RC; wrong DVB settings.
- Certificates/AVB flags: newer images enforce verification; mixing components can stall at boot.

3) Memory map you will be dealing with
- SPI NOR (typically 64–128 Mbit): first‑stage loader, boot logo, secure keys.
- eMMC 8 GB: Android system/vendor/product + userdata.
- A dead SPI prevents USB “SOS” from starting; in that case external programming is required.

4) Typical failure patterns and likely root causes
- Stuck on logo / boot loop: damaged system/vendor partitions; often recoverable with SOS.
- LED changes + backlight but no image: panel mismatch in the loaded image.
- No LED change, no USB activity: SPI bootloader corrupted → program SPI externally.

Current information and trends
- Since 2024 many low‑cost Android TV boards moved to stronger verification (dm‑verity/AVB). Unsigned or cross‑brand community images may not boot unless a service jumper disables verification.
- Universal “one‑bin‑fits‑all” releases are disappearing; panel tables are increasingly locked per SKU.

Supporting explanations and details
How to positively identify a compatible build before flashing:
- Read the LCD panel sticker on the metal frame (e.g., HV320WHB‑Nxx, LC320DXY‑SExx, ST3151A05‑x). A photo helps avoid transcription errors.
- If the set still boots to service menu, note the Panel_ID (common codes: Menu 1147 or Source 2580; varies by brand).
- Inspect the candidate .bin (if you obtain one): many packages include a readable config/ini block; search for your exact Panel_ID string. If it’s not present, don’t flash.

USB SOS update checklist (once you have the right file):
- Use a small USB stick (≤8 GB) formatted FAT32, copy the .bin to root, don’t rename.
- Power off/unplug TV, insert USB into the service‑friendly USB2.0 port.
- Press and hold the local power/joystick button, plug AC; release when LED starts fast‑blinking.
- No screen output is common during SOS; allow 5–10 minutes. Interrupting power can brick eMMC.

If SOS won’t start (likely SPI damage):
- Back up and re‑program SPI externally with CH341A/RT809H + SOIC8 clip. Confirm chip voltage: most are 3.3 V (e.g., W25Q64FV), but if you find a 1.8 V variant (e.g., W25Q64JV‑SIQ), use a 1.8 V adapter.
- After restoring a known‑good SPI, repeat the USB SOS to rebuild eMMC.
- Advanced: eMMC ISP reflash (CLK/CMD/DAT0/3V3/GND test pads) is possible but requires steady hands and a capable programmer (e.g., UFI/Medusa/RT809H‑eMMC). Use only if you know exactly which partitions to write.

Integrity checks for any file you obtain:
- Expected size is typically several hundred MB to a few GB. “Tiny” files (8–32 MB) are SPI‑only; don’t try them via USB SOS unless explicitly documented.
- Ask the source for MD5/SHA‑256; verify after download to catch corruption.

Ethical and legal aspects
- The firmware is OEM intellectual property. Public redistribution via cloud drives typically violates licensing. For that reason, links get removed and cannot be posted here.

Practical guidelines (fastest safe options)
- Authorized channel: If time‑critical, contact an authorized service partner for your TV brand; provide board “TP.HV352T.PB753(N)” and the exact panel code.
- Technician communities: Post your board and panel photos to professional forums (including Elektroda’s firmware sections). Members often share panel‑matched dumps (SPI + eMMC) or point to vetted sources.
- Paid repositories: If you choose a pay‑per‑file site, only purchase when the listing explicitly states your panel code and memory config; request checksums beforehand.

Possible disclaimers or additional notes
- Any firmware operation is at your own risk. Always make a SPI backup before writing anything. Use an isolation transformer or, at minimum, ensure proper mains safety during bench work.

Suggestions for further research
- Search by “PB753(N) + your exact panel code” rather than by board alone.
- Consider building your own “rescue” by pairing a known‑good SPI with an SOS package that lists your Panel_ID (many bundles are multi‑panel).
- If you have UART access (3.3 V TTL, commonly 115200 8N1 on a 4‑pin header), capture boot logs to diagnose where the boot fails (preloader vs Android).

Brief summary
- I can’t provide a free Google Drive/Mega link for this proprietary image.
- The only safe path is to obtain a panel‑matched build, verify it, back up your SPI, and then perform SOS or external programming as needed.
- With your TV brand/model and panel code, I can help you narrow to a verified match and the correct recovery procedure.

Questions for you (to proceed quickly)
1) Exact TV brand and model from the rear sticker?
2) LCD panel model (photo of the sticker on the panel metal frame)?
3) Board silkscreen shows “TP.HV352T.PB753(N)”—confirm the “(N)” suffix and any hardware revision.
4) Symptoms: boot loop, black screen with backlight, no LED change, etc.?
5) Do you have access to a CH341A (and 1.8 V adapter, if needed) and a small FAT32 USB stick?

Provide these details and I’ll guide you to a matching, verified image and the safest recovery steps.

youcef3232 wrote:

@ElektrodaBot merci frer

Status update (15/09/2025)
Thanks for the follow‑up. You’re welcome. As of today, there is still no verified, legally free public mirror for allupgrade_an12_V3520N0E_8G_512X2MB_sos.bin for TP.HV352T.PB753(N). For a safe recovery you’ll need a panel‑matched package.

What I need from you to proceed
Please post:
- TV brand and exact model from the rear label.
- LCD panel code from the sticker on the panel metal frame (photo preferred).
- Board silkscreen confirmation: “TP.HV352T.PB753(N)” and any hardware rev.
- Symptoms (boot loop, black screen with backlight, no LED, etc.).
- Tools available (USB stick ≤8 GB, CH341A/RT809H, 1.8 V adapter, UART).

With this, I can point you to a matching image/dump and the safest procedure.

Fast path you can do today
- If the set still reacts: try to read the Panel_ID from service menu (common codes: Menu 1147 or Source 2580; varies by brand). Note it exactly.
- Prepare for recovery:
- Back up the SPI first with a programmer (SOIC8 clip; verify voltage—most are 3.3 V, some 1.8 V).
- Use a small FAT32 USB drive reserved for SOS updates.
- If you obtain any candidate .bin, don’t flash immediately—send me:
- File size and MD5/SHA‑256.
- A hexdump or screenshot around the config/ini block so we can confirm your Panel_ID is listed.

Safety reminders
- A mismatched image on PB753(N) commonly yields backlight with no picture or a hard brick.
- If USB SOS does not start (no LED activity), the SPI bootloader is likely corrupt; restore SPI first, then rebuild eMMC via SOS.

Brief summary
I’m ready to help you finish this quickly, but I need the panel code and basic symptoms to locate a verified, panel‑matched build and guide the exact recovery steps.