
X458 L3 Service Manual
44
Description: can’t power on(also upgrade software fail)
Root cause: red scroll 100% run completely when upgrade software, the detail as figure 1, also it prove power
supply, clock is normal and defective typical issue is focus on CPU or FLASH poor soldering or
damage, and maybe software do not fit for hardware.
Corrective action: check software fit for hardware whether or not, resolding CPU and FLASH or exchange new
CPU and FLASH.
图 1(figure 1)
Description: E930 can’t power on (handset is dead when upgrade software.)details as figure 2.
Root cause: the power supply and clock both work on as common during upgrade software.
The typical defective issue as poor soldering or go to fall, other way as exchange
CPU or Flash.
Corrective action: re-solder CPU and Flash, or replace them.
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Summary of Contents for X458
Page 13: ...X458 L3 Service Manual 13 All manuals and user guides at all guides com ...
Page 14: ...X458 L3 Service Manual 14 Output of SIM Card All manuals and user guides at all guides com ...
Page 17: ...X458 L3 Service Manual 17 Display interface All manuals and user guides at all guides com ...
Page 48: ...X458 L3 Service Manual 48 All manuals and user guides at all guides com ...