| here is some...
1.tx line low for bootstrap begin
a.ccont and circuit
b.hagar &circuit
c.crystal osci
d.clock crystal
e.cpu
2. preloader boot error
a.loose connection between cable and phone,mostly terminal
b.hagar
c.crystal osci
d.cpu
3.phone ram is bad
a.ram itself
b.flash i.c
c.cpu
4.unknown flash? of course flash ic
5.not accept algorythm code
a.loose battery terminal connection
b.ccont
c.flash ic
6.battery voltage is too low
a.low supply
b.flash i.c
c.ccont
7.flash erasing error
a.low supply
b.flash i.c
c.ccont
d.cpu
8.power off mobile first and then connect
a.loose connection between phone and flasher, or batterry no charge.
b.open line between positive and ground
c.shorted between + and -
9.power on shortly
a.bad switch, use charger to trigger if does not respond then..
b.ccont
c.shorted components,hang other components to test.
d.cpu
10.successfull flash programming but program undetectable.
a.ram
b.flash ic.
hope it helps...
br.. |