小米5 不明原因故障 有救嗎?哪裡能修

某次我拿起小米5要看時間時
發現黑屏打不開 以為是沒電了
插充電線呼吸燈有閃藍光一次
之後就沒有任何反應
充電後也沒辦法開機
也無法進入 fastboot recovery模式

插電腦抓的到9008硬體
但感應不到手機(可能是我有設USB僅充電)
長按關機鍵電腦會有抓到硬體的聲音

有嘗試刷機

[3.76 COM3]:max buffer sector is 256
[3.77 COM3]:send command:<?xml version="1.0" ?><data><setbootablestoragedrive verbose="0" value="1"/></data>
[3.78 COM3]:get response from target
[4.28 COM3]:dump:
[4.29 COM3]:<?xml version="1.0" encoding="UTF-8" ?>
<data>
<log value="ERROR: Failed to initialize (open whole lun) UFS Device slot 0 partition 1"/>
</data><?xml version="1.0" encoding="UTF-8" ?>
<data>
<log value="ERROR: Failed to open the device 3 slot 0 partition 1"/>
</data><?xml version="1.0" encoding="UTF-8" ?>
<data>
<log value="INFO: Device type 3, slot 0, partition 1, error 0"/>
</data><?xml version="1.0" encoding="UTF-8" ?>
<data>
<log value="WARN: Set bootable failed to open 3 slot 0, partition 1, error 0"/>
</data><?xml version="1.0" encoding="UTF-8" ?>
<data>
<response value="NAK" />
</data>


[4.37 COM3]:<?xml version="1.0" encoding="UTF-8" ?>
<data>
<log value="ERROR: Failed to initialize (open whole lun) UFS Device slot 0 partition 1"/>
</data><?xml version="1.0" encoding="UTF-8" ?>
<data>
<log value="ERROR: Failed to open the device 3 slot 0 partition 1"/>
</data><?xml version="1.0" encoding="UTF-8" ?>
<data>
<log value="INFO: Device type 3, slot 0, partition 1, error 0"/>
</data><?xml version="1.0" encoding="UTF-8" ?>
<data>
<log value="WARN: Set bootable failed to open 3 slot 0, partition 1, error 0"/>
</data><?xml version="1.0" encoding="UTF-8" ?>
<data>
<response value="NAK" />
</data>

但是不成功
請問是硬體故障還軟體故障
故障前4天有摔到過
用了4個月左右
在台灣有辦法修嗎?
在大陸維修是不是只有預約現場修的模式?

若無法修復有賣掉回收的價值嗎?