中文
含义
LED指示灯闪烁2次，表示电源供应系统故障。该代码涉及主电源板（Power Supply Unit）的异常，可能导致电视完全无法开机或开机后自动关机。
常见原因
- 电源板主电容老化鼓包或漏液，导致滤波不足
- 电源板上开关管（MOSFET）或整流二极管击穿短路
- 待机电源（Standby Power）供电异常，5VSB电压偏离标准值
- 电源板输出端短路，触发过流保护
- PFC（功率因数校正）电路故障，导致高压供电不稳定
自助排查
- 断开电视电源5分钟后重新上电，观察能否恢复正常
- 打开后盖检查电源板有无明显电容鼓包、烧焦痕迹或异味
- 使用万用表测量待机5VSB电压，应在4.75V-5.25V范围内
- 如发现电容鼓包或保险管熔断，需更换同规格电源板
English
Meaning
The LED indicator blinks twice, indicating a power supply system failure. This code points to an anomaly in the main power supply unit (PSU), which may prevent the TV from powering on at all or cause it to shut down shortly after start.
Common Causes
- Main electrolytic capacitors bulging or leaking, causing insufficient filtering
- Short-circuited switching MOSFETs or rectifier diodes on the PSU
- Standby power (5VSB) rail out of nominal range
- Short circuit on the PSU output side, triggering overcurrent protection
- PFC (Power Factor Correction) circuit failure causing unstable high-voltage supply
Self-Check Steps
- Unplug the TV for 5 minutes, then reconnect and observe if normal operation resumes
- Open the back cover and inspect the PSU for bulging capacitors, burn marks, or unusual odor
- Use a multimeter to measure the 5VSB standby voltage — should be between 4.75V-5.25V
- If bulging capacitors or a blown fuse are found, replace the PSU with an equivalent model