LG Software_File Version 03.50.14 USB Firmware for LB552V, LB561V, LB620V, LY310C TVs

User question

Software_File_(Version_03.50.14)

Artificial Intelligence Response

Direct answer to the question

• “SoftwareFile(Version_03.50.14)” is an LG TV firmware update package (distributed as a ZIP archive) intended for specific 2014-era LG LB/LY-series models. It’s used to update TV firmware via USB using the LG_DTV method. (lg.com)
• Key points:
  • Applies only to certain models/suffixes (e.g., 42LB552V, 42LB561V, 42LB620V, 42LB626V, 28/32/42/49LY310C, and others). You must match the exact model and suffix on the product label. (lg.com)
  • The ZIP contains an .epk image that the TV reads from a USB drive folder named LG_DTV. (files.elektroda.pl)
  • This is legacy software (posting dates on LG sites show 2015 for related docs; some variants in this series have 03.50.11 posted later in 2022). Use the model’s official support page to determine the right file/version. (lg.com)

Detailed problem analysis

• What it is:
  • An official LG firmware bundle named in the form “Software_File(Version_03.xx.xx).zip.” Inside is an encrypted package (.epk) such as “...V03.50.14_usb_V2_SECURED.epk,” which the TV’s update routine verifies before flashing. (files.elektroda.pl)
• Who it’s for:
  • It targets specific LB/LY chassis and regional suffixes (ZA, ZE, ZC, TB, etc.). LG uses suffixes to encode tuner/region boards; cross‑flashing a mismatched suffix can fail validation or risk bricking. The 42LB552V support page, for example, lists a large, model‑specific applicability set for 03.50.14. (lg.com)
• Version context:
  • On some LB variants you will see “Software File (Version 03.50.14)” entries dated December 11, 2015 (document posting date for the update guide shown alongside the firmware entry). On the same page LG also hosts “Software File (Version 03.50.11)” dated November 14, 2022 for particular suffixes—illustrating that “newer” numerically isn’t always newer for every hardware variant. Always trust the exact model’s page over generic version comparisons. (lg.com)
• Update channel:
  • LG supports both OTA (over‑the‑air) and USB updates. OTA is safest when available; USB is needed when the TV is offline or when a specific package must be applied. The USB process requires a FAT32 drive and a folder named LG_DTV at the drive root. (lg.com)
• Why/when to use it:
  • Typical goals are bug fixes, stability, and feature maintenance for these legacy models. For many units in this family there have been no functional changes for years, so the main reasons to touch firmware are: resolving a specific bug, recovering from file corruption, or matching an approved version for a service procedure. (lg.com)

Current information and trends

• Today (November 8, 2025), these LB/LY-series TVs are legacy devices. LG’s Help Library still documents the USB update method, but active feature development for the 03.50.xx branch has long ceased; newer WebOS models follow different version lines and larger packages. For your LB model, rely on the model’s own support page (region-specific) for whatever LG still hosts. (lg.com)
• Practical observation: for some suffixes (e.g., “-TB” on 42LB552V), LG lists 03.50.11 as the “latest” posting as of 2022, while 03.50.14 appears alongside with an earlier posting date and a broader applicability list. Match exactly what the page shows for your model/suffix. (lg.com)

Supporting explanations and details

• File contents and naming:
  • The ZIP expands to an .epk that typically includes model family identifiers and “V03.50.14” in the filename. This is normal for LG’s secured USB packages. (files.elektroda.pl)
• Installation mechanics (USB):
  • Format USB to FAT32.
  • Create LG_DTV at the drive root.
  • Extract the ZIP; place the .epk inside LG_DTV (not the .zip).
  • Insert USB into the TV; accept the on‑screen “USB UPDATE READY” prompt. (lg.com)
• Post‑update behavior:
  • The TV reboots automatically. If the same or newer version is already installed, it will refuse to downgrade via the standard path. (lg.com)

Ethical and legal aspects

• Only use firmware from LG’s official support site for your exact model and region. Third‑party file hosts exist but pose integrity and licensing risks; flashing a modified or wrong-region image can permanently disable the mainboard. (lg.com)

Practical guidelines

• Identify precisely:
  • Full model and suffix from the rear label (e.g., 42LB552V‑TB vs 42LB552V‑ZA).
  • Current software version (Settings → Support/General → About/TV Information). (lg.com)
• Obtain the file:
  • Navigate to LG’s support page for your exact model and download the software listed there (03.50.14 only if shown as applicable for your suffix). (lg.com)
• Prepare and update:
  • Use a small, known‑good FAT32 USB stick; create LG_DTV; extract the ZIP so the .epk sits inside LG_DTV; insert into the TV and follow prompts; do not remove power during the update. (lg.com)
• If the TV does not detect the file:
  • Recheck the folder name and file extraction.
  • Try a different USB drive/port.
  • Confirm the ZIP is for the exact model/suffix and that you are not attempting a downgrade. (lg.com)

Possible disclaimers or additional notes

• Version numbering can be branch‑specific: 03.50.14 is not universally “newer” than 03.50.11 across all suffixes. Always prefer the version flagged as applicable on your model’s page. (lg.com)
• Some unofficial sites list file sizes/dates; treat these as indicative only and prefer LG as the source of truth. (lg.com)

Suggestions for further research

• Provide your exact model and suffix, current firmware version, and your goal (bug you want to fix, recovery, etc.). I can then confirm the right package and provide model‑specific steps.
• If needed, I can walk you through verifying the integrity of the ZIP (hash) and safe recovery options if an update fails.

Brief summary

• SoftwareFile(Version_03.50.14) is an LG USB firmware package for select LB/LY TVs. Confirm your exact model/suffix on LG’s support site, follow the LG_DTV USB procedure, and do not cross‑flash between regions or attempt unsupported downgrades. If you share your model and current version, I’ll map you to the correct file and a step‑by‑step tailored procedure. (lg.com)

To help you best: what is your exact TV model (including the suffix letters) and the firmware version currently installed?

Disclaimer: The responses provided by artificial intelligence (language model) may be inaccurate and misleading. Elektroda is not responsible for the accuracy, reliability, or completeness of the presented information. All responses should be verified by the user.