[Xiaomi Redmi 8 Questions & Answers] Lachlan McKenzie:
Afternoon all,

I recently purchased a Xiaomi Redmi 8 online (global ROM). I bought the phone cheap, the person I bought it off reported that "as been turned on once, However, when trying to set up the phone it crashed and hasn't turned on since. It still vibrates when the power cable is plugged in or the power button is held down." Since then the phone has turned on once randomly (everything working) but it then shut off an hour later.

The phone appears to be able to enter fastboot mode, but can't enter adb. I have been unsuccessful trying to unlock the bootloader (for reflashing purposes). I assume this is due to the USB debugging being disabled.

Below I've posted the fastboot device info and getvar.

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C:\adb>fastboot oem device-info

...

(bootloader) Device tampered: false

(bootloader) Device unlocked: false

(bootloader) Device critical unlocked: false

(bootloader) Charger screen enabled: true

(bootloader) Display panel:

OKAY [ 0.030s]

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C:\adb>fastboot getvar all

(bootloader) version:0.5

(bootloader) token:VQEBHwEQHYlxzP+m+K9wt/dncIBQPwMFb2xpdmUCBBdi7Wc=

(bootloader) crc:1

(bootloader) battery-soc-ok:yes

(bootloader) battery-voltage:4166983

(bootloader) variant:QRD eMMC

(bootloader) unlocked:no

(bootloader) secure:yes

(bootloader) version-baseband:

(bootloader) version-bootloader:

(bootloader) logical-block-size:0x200

(bootloader) erase-block-size:0x200

(bootloader) display-panel:

(bootloader) off-mode-charge:1

(bootloader) charger-screen-enabled:1

(bootloader) max-download-size: 0x1ff00000

(bootloader) partition-type:userdata:ext4

(bootloader) partition-size:userdata: 0x537bfbe00

(bootloader) partition-type:cust:raw

(bootloader) partition-size:cust: 0x34000000

(bootloader) partition-type:vendor:raw

(bootloader) partition-size:vendor: 0x60000000

(bootloader) partition-type:system:ext4

(bootloader) partition-size:system: 0x120000000

(bootloader) partition-type:modem:raw

(bootloader) partition-size:modem: 0x8000000

(bootloader) partition-type:cache:ext4

(bootloader) partition-size:cache: 0x18000000

(bootloader) partition-type:minidump:raw

(bootloader) partition-size:minidump: 0x8000000

(bootloader) partition-type:exaid:raw

(bootloader) partition-size:exaid: 0x18000000

(bootloader) partition-type:logdump:raw

(bootloader) partition-size:logdump: 0x4000000

(bootloader) partition-type:recovery:ext4

(bootloader) partition-size:recovery: 0x4000000

(bootloader) partition-type:boot:raw

(bootloader) partition-size:boot: 0x4000000

(bootloader) partition-type:mdtpbak:raw

(bootloader) partition-size:mdtpbak: 0x2000000

(bootloader) partition-type:mdtp:raw

(bootloader) partition-size:mdtp: 0x2000000

(bootloader) partition-type:persistbak:raw

(bootloader) partition-size:persistbak: 0x2000000

(bootloader) partition-type:persist:raw

(bootloader) partition-size:persist: 0x2000000

(bootloader) partition-type:dspbak:raw

(bootloader) partition-size:dspbak: 0x1000000

(bootloader) partition-type:dsp:raw

(bootloader) partition-size:dsp: 0x1000000

(bootloader) partition-type:splash:raw

(bootloader) partition-size:splash: 0x1000000

(bootloader) partition-type:gsort:raw

(bootloader) partition-size:gsort: 0x800000

(bootloader) partition-type:fsg:raw

(bootloader) partition-size:fsg: 0x800000

(bootloader) partition-type:modemst2:raw

(bootloader) partition-size:modemst2: 0x800000

(bootloader) partition-type:modemst1:raw

(bootloader) partition-size:modemst1: 0x800000

(bootloader) partition-type:dtbobak:raw

(bootloader) partition-size:dtbobak: 0x800000

(bootloader) partition-type:dtbo:raw

(bootloader) partition-size:dtbo: 0x800000

(bootloader) partition-type:devinfo:raw

(bootloader) partition-size:devinfo: 0x800000

(bootloader) partition-type:mcfg:raw

(bootloader) partition-size:mcfg: 0x400000

(bootloader) partition-type:tzbak:raw

(bootloader) partition-size:tzbak: 0x200000

(bootloader) partition-type:tz:raw

(bootloader) partition-size:tz: 0x200000

(bootloader) partition-type:bk4:raw

(bootloader) partition-size:bk4: 0x100000

(bootloader) partition-type:dip:raw

(bootloader) partition-size:dip: 0x100000

(bootloader) partition-type:abootbak:raw

(bootloader) partition-size:abootbak: 0x100000

(bootloader) partition-type:aboot:raw

(bootloader) partition-size:aboot: 0x100000

(bootloader) partition-type:misc:raw

(bootloader) partition-size:misc: 0x100000

(bootloader) partition-type:keymasterbak:raw

(bootloader) partition-size:keymasterbak: 0x100000

(bootloader) partition-type:keymaster:raw

(bootloader) partition-size:keymaster: 0x100000

(bootloader) partition-type:cmnlib64bak:raw

(bootloader) partition-size:cmnlib64bak: 0x100000

(bootloader) partition-type:cmnlib64:raw

(bootloader) partition-size:cmnlib64: 0x100000

(bootloader) partition-type:cmnlibbak:raw

(bootloader) partition-size:cmnlibbak: 0x100000

(bootloader) partition-type:cmnlib:raw

(bootloader) partition-size:cmnlib: 0x100000

(bootloader) partition-type:syscfg:raw

(bootloader) partition-size:syscfg: 0x80000

(bootloader) partition-type:keystore:raw

(bootloader) partition-size:keystore: 0x80000

(bootloader) partition-type:mota:raw

(bootloader) partition-size:mota: 0x80000

(bootloader) partition-type:rpmbak:raw

(bootloader) partition-size:rpmbak: 0x80000

(bootloader) partition-type:rpm:raw

(bootloader) partition-size:rpm: 0x80000

(bootloader) partition-type:sbl1bak:raw

(bootloader) partition-size:sbl1bak: 0x80000

(bootloader) partition-type:sbl1:raw

(bootloader) partition-size:sbl1: 0x80000

(bootloader) partition-type:msadp:raw

(bootloader) partition-size:msadp: 0x40000

(bootloader) partition-type:apdp:raw

(bootloader) partition-size:apdp: 0x40000

(bootloader) partition-type:devcfgbak:raw

(bootloader) partition-size:devcfgbak: 0x40000

(bootloader) partition-type:devcfg:raw

(bootloader) partition-size:devcfg: 0x40000

(bootloader) partition-type:bk3:raw

(bootloader) partition-size:bk3: 0x20000

(bootloader) partition-type:vbmetabak:raw

(bootloader) partition-size:vbmetabak: 0x10000

(bootloader) partition-type:vbmeta:raw

(bootloader) partition-size:vbmeta: 0x10000

(bootloader) partition-type:bk2:raw

(bootloader) partition-size:bk2: 0x10000

(bootloader) partition-type:bk1:raw

(bootloader) partition-size:bk1: 0x9000

(bootloader) partition-type:config:raw

(bootloader) partition-size:config: 0x8000

(bootloader) partition-type:limits:raw

(bootloader) partition-size:limits: 0x8000

(bootloader) partition-type:DDR:raw

(bootloader) partition-size:DDR: 0x8000

(bootloader) partition-type:sec:raw

(bootloader) partition-size:sec: 0x4000

(bootloader) partition-type:dpo:raw

(bootloader) partition-size:dpo: 0x2000

(bootloader) partition-type:ssd:raw

(bootloader) partition-size:ssd: 0x2000

(bootloader) partition-type:fsc:raw

(bootloader) partition-size:fsc: 0x2000

(bootloader) hw-revision:10000

(bootloader) rollback_ver:1

(bootloader) serialno:e6609a5f0706

(bootloader) kernel:lk

(bootloader) product:eek:live

all:

finished. total time: 1.018s

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Has anyone encoutered this issue before? At this stage my next move is to

try enter EDL mode (although, this requires authentification I've read?).

Could it be a hardware issue, or firmware? I have access to multimeters, oscilliscopes, etc,

are there any guides on test-points for Xiaomi phones?

If anyone could shed some light on this, it would be greatly appreciated.

Thanks,

Lachlan