E04 - 长虹 电视

中文

含义

长虹电视检测到主芯片（主 SoC）故障，电视可能出现无法开机、开机后自动重启、卡在开机 logo 画面、花屏或无任何响应等严重问题。E04 错误代码表示电视机核心处理器 SoC 无法正常工作，这是电视的”大脑”故障，所有功能均依赖于此芯片。

常见原因

1. SoC 芯片因散热不良长期过热运行，导致内部晶体管退化或烧毁。
2. SoC 内部供电轨短路，通常由芯片内部电源管理单元故障或外部滤波电容短路引发。
3. BGA 封装焊点在长期热循环下出现裂纹，导致芯片与 PCB 之间连接断开。
4. SoC 外接晶振失效或频率偏移，导致芯片无法获得稳定的时钟信号。
5. 为 SoC 核心供电的 PMIC（电源管理 IC）输出电压异常，导致内核供电不足或过压。
6. SoC 遭受静电放电（ESD）或电网浪涌冲击损坏。

自助排查

1. 断开电视所有外接设备（HDMI 线、USB 设备、网线等），拔掉电源插头，等待 10 分钟以上后重新连接电源尝试开机。
2. 如果电视能够进入待机状态（指示灯亮），尝试长按机身电源键或遥控器电源键 10 秒以上执行硬复位。
3. 观察电视机散热孔是否有灰尘堵塞，确保电视周围有足够的通风空间（四周至少留 10 cm 间隙）。
4. 检查插座的电压是否正常，尝试更换其他插座排除供电问题。
5. 主 SoC 故障属于最严重的硬件故障，无法通过用户操作修复。请联系长虹售后服务中心，由专业技师进行主板检测、BGA 焊接维修或主板整体更换。

English

Meaning

The Changhong TV has detected a main chip (main SoC) fault. The TV may fail to power on, reboot automatically after startup, freeze at the boot logo, show a scrambled screen, or exhibit no response at all. The E04 error code indicates the TV’s core processor SoC is not functioning normally. This is the “brain” of the TV — all functions depend on this chip.

Common Causes

1. The SoC chip has been running at high temperature for extended periods due to poor heat dissipation, causing internal transistor degradation or burnout.
2. An internal power rail short within the SoC, typically caused by internal PMU failure or external filter capacitor short circuits.
3. BGA package solder joints have developed cracks under repeated thermal cycling, breaking connections between the chip and the PCB.
4. The external crystal oscillator for the SoC has failed or drifted in frequency, preventing the chip from obtaining a stable clock signal.
5. The PMIC (Power Management IC) supplying the SoC core voltage is outputting abnormal voltage, resulting in under-voltage or over-voltage to the core.
6. The SoC has been damaged by electrostatic discharge (ESD) or grid surge events.

Self-Check Steps

1. Disconnect all external devices (HDMI cables, USB devices, Ethernet, etc.) from the TV, unplug the power cord, wait at least 10 minutes, then reconnect power and attempt to turn on.
2. If the TV can enter standby mode (indicator light is on), try holding the physical power button or remote power button for more than 10 seconds to perform a hard reset.
3. Check whether the TV’s ventilation holes are blocked by dust and ensure sufficient airflow space around the TV (at least 10 cm clearance on all sides).
4. Verify that the wall outlet voltage is normal — try a different outlet to rule out power supply issues.
5. Main SoC faults are among the most severe hardware failures and cannot be repaired through user operations. Contact Changhong after-sales service for a professional technician to perform main board diagnostics, BGA rework, or complete main board replacement.