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• There is no publicly released Ikon service-grade firmware (USB file or full dump) for TP.HV553.PC821 + panel code E43DMS.
• To obtain it you must rely on one of three channels:
• The firmware has to match all of the following: board ID (TP.HV553.PC821 or PC821B), memory size, tuner option, and the exact LVDS/V-by-One timing used by the E43DMS panel.
• First try a USB-service update file; only if the bootloader is corrupt move to a raw dump written with an external programmer.
• Always back up the original content and verify checksums after flashing.
Hardware constellation
• Mainboard: TP.HV553.PC821 – a “universal” Android-based design (SoC: typically Realtek RTD2851 or MT58xx derivative), 1 GB/8 GB or 1 GB/16 GB eMMC, SPI NOR (4–16 MB) for 1st-stage boot.
• Panel: internal sticker “E43DMS-xxxx” (43 in, FHD 1920 × 1080, 60 Hz). The firmware contains the panel’s timing table and power-on sequence – mismatch = white screen, negative image or no backlight.
Firmware granularity
a) Consumer/USB package (≥ 500 MB, ‑.bin/-.img). Flashed via service routine, keeps bootloader intact.
b) Full flash dump (size = exact capacity, e.g. 8 GB eMMC + 16 MB SPI). Written with RT809H, TL866-II, CH341A, etc. Use when TV is totally dead or stuck in an endless boot loop with no key-combo reaction.
Typical failure modes
• Stuck on “IKON / SmartTV / Wisdom-Share” logo (system partition corruption).
• No power LED → mostly power rail or eMMC initial boot failure; often solved only after re-programming raw dump.
• Picture OK but inverted / colour-solarised → wrong LVDS mapping → choose different “Panel-ID” inside service menu or use correct firmware variant.
Compatibility matrix
(You can build your own table; the critical fields are SoC variant, DRAM size, eMMC size, Tuner-IC, Wi-Fi module and IR receiver address set. Each firmware image hard-codes those.)
How to positively identify the right image
• Open the set; take macro photos of the white label on the panel and the silk-screen on the PCB (e.g. “TP.HV553.PC821 2020-09-15 VER 1.02”).
• Check dump filenames posted by technicians: most carry the panel ID (e.g. “HV553_PC821_E43DMS_1920x1080_8G_201128.bin”).
• If you see the same board paired to panels such as V430HJ1-PE1 or LC430DUE, do not use it unless the LVDS table list shows a line for E43DMS.
• “Universal” Android boards (TP.HV553, CV638, CVT910, etc.) dominate low- to mid-cost brands; service firmware is seldom published and is mainly exchanged peer-to-peer.
• Latest dumps are increasingly encrypted or signed; unauthorised flashing may be blocked by secure boot in 2023+ revisions.
• Professional labs (Remont-Aud, DipElectronicsLAB) maintain pay-per-file databases; ensure the SHA-1/MD5 they provide matches after download.
Firmware update by USB (preferred)
1. FAT32-format 8 GB USB-stick → copy only the upgrade file (keep name as supplied).
2. Unplug AC → insert USB → press and hold local power or “VOL-”+“CH+” combo → plug AC.
3. LED will blink fast; screen may remain dark for ~30 s, then a progress bar appears.
4. When complete, the set reboots twice and stops at first-time-setup wizard. Direct flash programming (when USB fails)
• Locate SPI NOR (e.g. Winbond 25Q64) and/or eMMC (BGA153).
• Read original content → save as backup. If the programmer refuses to read, CS/CLK lines may be latched by SoC → lift pin-1 (CE) or fully remove chip.
• For BGA eMMC use socket adapter; erase, blank-check, program, verify.
• Reball or hot-air re-install, clean flux residues, inspect under microscope.
• Firmware is copyrighted by the SoC vendor + TV OEM; redistribution without permission may infringe IP. Many forums therefore provide it only via private message after proof of ownership.
• Ensure any board replacement or programming complies with the country’s consumer-electronics safety rules (IEC 62368-1).
• Maintain ESD protection – latent damage to DDR or Wi-Fi module causes intermittent failures.
Potential challenges & mitigation
• “Still dark after successful flash” → backlight enable missing; check P-Dimm, BL-ON from mainboard to PSU.
• “No remote response” → inside service menu switch RC-Type from 0 × 20DF to 0 × 40BF, or pair with universal RC.
• Because Ikon sources boards from multiple ODM batches, two visually identical TVs may carry different panel firmware. If in doubt, hunt for dump from exactly the same build month.
• Some files circulating on forums are partial (only SPI, not eMMC) – writing those to a blank eMMC will not boot.
• If secure-boot (SB) is enabled, only signed images from Ikon will pass the first-stage loader. In that case, board replacement is often faster than re-signing.
• Investigate converting generic TP.HV553 Android 7 images to your panel by editing project_info.txt and panel_init.bin.
• Monitor forums for eMMC health logging tools (e.g. RTD-diag via UART) – early warning of bad blocks.
• Look into replacement “smart sticks” (Chromecast, Fire TV) as an economical alternative when only the Android side of the board is problematic.
To revive an Ikon 43-inch (E43DMS) TV with mainboard TP.HV553.PC821 you require an exact-match service firmware. Ikon does not publish it; obtain it from the service network, specialised technician repositories, or by cloning an identical working unit. Start with a USB upgrade; escalate to full SPI/eMMC dump only if the bootloader is destroyed. Carefully match board, panel and region, back up everything before programming, and follow ESD-safe, regulator-verified procedures to avoid permanent damage.