Be-four the starting repair process 1st we have clear about that what is the main Couse behind a dead phone . Remove the battery and plug in again, or try using another battery and try turning it on Check the battery connector and try the press to see the level of flexible or not, Normally it’s happen due to :- 1. Software Problem 2. Hardware Problem
Be-four
the starting repair process; you have to check the battery condition,
its current or volt. Normally all mobile battery are output volt 3.7to
4.2 volt or its current about 800ma to 3500ma.its also mention over the
battery.
How to check a battery
You
can easily check a battery with a DC POWER supply, select the power
supply rotary in 4.2 volt condition than connect battery through power
supply output pin. when connect battery to power supply, the power
supply both meter one amp &volt meter reflect parameter, if the
batter dry then amp will be show 1400 ma after some time it will be go
down to 1200-100 when it will came into 800 or 700 ma then its ok &
ready to On a mobile phone. otherwise the battery faulty , if you have
no power supply you can also check through a multi meter select meter
band in DC volt (10v), then connect battery tips through meter probe by
polarity (+ or -) it will be show the volt .
Next
check the hand set current consumption through DC power supply , after
connect handset with power supply you can identify what is the main
causes behind the dead phone if current consumption is normal near
about 30 ma then try to upgrade latest software of flashing ,
Or if current consumption is very hi then check for short component in mother board
Set
the meter probe set in 50ohm value, then connect mobile battery
connector through multimeter by polarity +,- or vies versa if its show
value near about 10ohms that men set ok or dead due to software or
component failure .if its show value 0 ohms that’s means its dead for
component short in motherboard.
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