Doesn't Switch On - Blu C5 Service Manual

Doesn't switch on

Check if
Start
power key
is ok
No
Yes
26M signal OK
Replace 26M
Yes
Check if CPU
soldering is ok
NO
Re-solder or
Replace CPU
Upgrade to latest
Yes
Software, check if
the issue have
been solved
YES
Replace
power key
Yes
Is the
NO
Replace
32.768K
Check if
Memory IC
soldering is ok
Re-solder or
No
Replace
Memory IC
No
Test if power-on
current is
abnormal
YES
OVER
Is crystal
oscillator's
Signal (32.768KHz)
OK
NO
Replace PMIC
Yes
Replace Main PWB
No
the power
sequence
If the current is
higher than
normal, check
the hotter
components,
then replace it
Yes
Is the PS voltage
OK
NO
Check