创维55G3-8H52不定时不开机

普通人物怨

[align=left][color=rgb(51, 51, 51)][font=SimSun, Tahoma, Helvetica, Arial, sans-serif]一块55G3-8H52的板子不定时不开机打印信息如下：[/font][/color][/align][align=left][color=rgb(51, 51, 51)][font=SimSun, Tahoma, Helvetica, Arial, sans-serif]Bootrom start[/font][/color][/align][align=left][color=rgb(51, 51, 51)][font=SimSun, Tahoma, Helvetica, Arial, sans-serif]Boot Media: SPI_NAND[/font][/color][/align][align=left][color=rgb(51, 51, 51)][font=SimSun, Tahoma, Helvetica, Arial, sans-serif]Boot head format invalid.[/font][/color][/align][align=left][color=rgb(51, 51, 51)][font=SimSun, Tahoma, Helvetica, Arial, sans-serif]正常应该是：[/font][/color][/align][align=left][color=rgb(51, 51, 51)][font=SimSun, Tahoma, Helvetica, Arial, sans-serif]Bootrom start[/font][/color][/align][align=left][color=rgb(51, 51, 51)][font=SimSun, Tahoma, Helvetica, Arial, sans-serif]Boot Media: eMMC[/font][/color][/align][align=left][color=rgb(51, 51, 51)][font=SimSun, Tahoma, Helvetica, Arial, sans-serif]Decrypt auxiliary code ...OK[/font][/color][/align][align=left][color=rgb(51, 51, 51)][font=SimSun, Tahoma, Helvetica, Arial, sans-serif]    根据打印信息提示发现没有找到正确的引导芯片。询问总部告知是主芯片J28脚BRI_PWM2对地阻值偏小，测量RS02后端发现对地只有270欧左右，正常3.8K,脱开R2S0 打印信息正常，问题应该在后级，测BL-ADJ脚对地的静电吸收管RV0S3两端只有120欧左右拆掉试机OK[/font][/color][/align]