Blu Studio J1 - Power, Display, and Input Fault Diagnosis

Doesn’t switch on
Start
YES
OVER
No
No
Check
the power
sequence
Check have
power or
Upgrade to latest
software
Test power-on
currency if
abnormal?
YES
If the currency
is higher than
normal, check
the hotter
components,
then replace it.
Yes
Check
power key
is ok?
No
OVER
Check the supply
power’s voltage
Yes
Replace U0501
Test U1001 ‘s
26M signal
Yes
Replace U1001
Check U0501
soldering
No
Re-solder or
Replace U0501
Replace Main PCBA
Yes
No