中文
含义
长虹电视检测到液晶面板内部故障，屏幕出现异常竖线、横线、色块或无法正常显示图像，E02 错误代码表示面板驱动电路或面板本身存在硬件问题。该故障通常无法通过软件操作修复，需要硬件级检修。面板故障可能表现为局部花屏、半屏无显示或全屏异常。
常见原因
- 面板行/列驱动 IC（Source Driver 或 Gate Driver）内部损坏，导致对应像素行或列无法正常驱动。
- 面板与驱动板之间的柔性排线（COF/TAB）出现脱胶或接触不良，导致信号传输中断。
- 面板玻璃基板因外力撞击或挤压出现微裂纹，破坏内部液晶和电极结构。
- COF（Chip on Film）绑定工艺退化，芯片与薄膜之间的金球接触点氧化或脱落。
- 面板逻辑供电（VGH、VGL、VCOM 等）异常，导致液晶偏转控制失效。
- 长期高温高湿环境使面板内部电极发生电化学腐蚀。
自助排查
- 断开电视电源，等待 1 分钟后重新通电开机，观察故障现象是否变化。偶发性驱动芯片复位异常可能会在重启后暂时恢复。
- 用遥控器进入电视设置菜单，执行”恢复出厂设置”，排除软件层面的显示异常。
- 切换不同的信号输入源（HDMI1、HDMI2、AV 等），确认是否为某一输入源信号问题而非面板自身故障。
- 轻按屏幕边框不同位置，观察屏显是否变化——如果按压某处时故障暂时消失或变化，说明排线接触不良。
- 面板故障属于精密部件维修，需要专用设备和洁净环境，不建议自行拆卸。请联系长虹售后服务中心，由专业技师检测确认后更换面板组件。
English
Meaning
The Changhong TV has detected an internal LCD panel fault. The screen shows abnormal vertical lines, horizontal lines, color blocks, or fails to display images properly. The E02 error code indicates a hardware problem with the panel driver circuitry or the panel itself. This fault typically cannot be resolved through software operations and requires hardware-level repair.
Common Causes
- The panel row/column driver IC (Source Driver or Gate Driver) is internally damaged, preventing normal driving of corresponding pixel rows or columns.
- The flexible flat cable (COF/TAB) between the panel and the driver board has delaminated or has poor contact, interrupting signal transmission.
- The panel glass substrate has developed micro-cracks due to external impact or pressure, damaging the internal liquid crystal and electrode structure.
- COF (Chip on Film) bonding has deteriorated — gold ball contacts between the chip and film have oxidized or detached.
- Panel logic power supply voltages (VGH, VGL, VCOM, etc.) are abnormal, causing failure in liquid crystal deflection control.
- Prolonged exposure to high temperature and humidity has caused electrochemical corrosion of internal panel electrodes.
Self-Check Steps
- Disconnect the TV from power, wait 1 minute, then reconnect and power on. Observe whether the fault changes — occasional driver IC reset anomalies may temporarily recover after restart.
- Use the remote to enter the TV settings menu and perform a “Factory Reset” to rule out software-level display anomalies.
- Switch to different input sources (HDMI1, HDMI2, AV, etc.) to confirm whether the issue is with a specific input signal rather than the panel itself.
- Gently press different positions along the screen bezel and observe whether the display changes — if the fault temporarily disappears or shifts when pressing a certain area, it indicates poor flex cable contact.
- Panel faults require precision component repair with specialized equipment and a clean environment. Do not attempt DIY disassembly. Contact Changhong after-sales service for a professional technician to diagnose and replace the panel assembly.