Download EAX66085703 LG 40UB800V eMMC Firmware Dump | Repair Guide (RT809H)
Repair Case Symptoms:
- TV stuck on LG logo (boot loop)
- No power / dead set
- Black screen with backlight ON
- Restarting continuously
- Corrupted system / no OS boot
Verified EMMC firmware for the EAX66085703 motherboard. This resource facilitates recovery from data corruption in the THGBMAG5A1JBAIR chip , a common point of failure for the LG 40UB800V series.
[Main Board: EAX66085703 – Click to Zoom]
RT809H Programming Tutorial
Hardware Specifications
| Main Board | EAX66085703 (1.0) |
|---|---|
| Panel Model | V400DK1-KE1 |
| EMMC IC | THGBMAG5A1JBAIR (IC1301) |
| Programmer | RT809H ISP EMMC Practice |
eMMC ISP Pinout Diagram
[ISP Pinout for LG EAX66085703 – Click to Zoom]
Download Repair Firmware
1st click opens verify link, 2nd click starts download.
Technician Activity Log
Admin_TV_TECH March 2026 SUCCESS
Firmware verified on LG 40UB800V. Resolved boot loop and logo hang. Flashed via ISP using RT809H.
