求指导，5800-A8R540-2P20不开机（已解决修好）

修电视

32E500E电视绿灯亮不开机，测得U21无1.0V，以为捡到宝，没想到换上3842开机1.0V有，一样故障，测U18-1.8V，U20-3.3V，U24-3.3V，U17-5V都有且稳定，就连主芯片都换故障一样，2芯片连打印都一样，求指导，谢谢。程序在本网站下的。2025-4-14, 15:9:41 COM6, BaudRate:115200 bps, RXD: VGA->11,TXD: VGA-> 4, Printed by RT809F:

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