Huawei Tag l23 Dead

Hi i have this phone in hands, im tried to read info on this phone but cant work and set gets dead state, i searched in forum and check same issue whit Tag l21 and i tried to make "init preloader" whit infinity tag loader but phone only vobrate one time but cant power on. i find same phone model and tried to make backup flash for get working preloader, but cant read firmware and gets dead state too.

here log from second dead phone:

Code:

1. Power Off Phone , Remove battery , Insert back
2. Insert USB cable. In some cases require hold BootKey

Wait for phone...
Phone found! [ 9 ]
Sync...
Inital Boot Ok!
BB_CPU_PID : 6735
BB_CPU_NME : [MediaTek] MT6735_S00
BB_CPU_EXT : 0xCA00 , 0x8A00 , 0x0000
Processing BROM stage
Settings for BROM configured!
SecCfgVal : 0x00000000
BromVer  : 0x0005
BLVersion : 0x00FE
PreLoader : NOT Active [ Erased ]
BootLdrSS : NORMAL with PRELOADER
Processing DA stage
DA Select done, will use MTK_AllInOne_DA_v5.1624.16.07
Sending and initialize DA ...
Running DA ver.4.2 on BBID : 0x93
NAND Flash : NOT INSTALLED
eMMC Flash : 3000011133473631A35900321FCB2CBB
Initialize Memory ...

[DA_ERROR] : DRAM Configure failed!
ErroCode : 0x2003
EMICFG_NOT_FOUND
TRY NOT HOLD VOLUME(+/-) KEYS ON CONNECT!
Boot Error!

Operation Failed
Elapsed: 00:00:11
Reconnect Power/Cable!