i9300 no power need ur expertise - GSM-Forum

HUM · 04-22-2016, 00:19

history :
recieve in hang /heating / sometimes null problem
not water damage
steps taken :
change baseband ic
reball emmc but same
finally change small rf crystal ic but same
i have doubt on this ic so i replace again but this time when i power on the phone its not on
i chk on external power supply it takes auto amp(even i remove emmc/baseband/small rf ic
but still take auto amp
like in picture

when press power key
needle goes like this and after releasing power key needle returns

pcb picture

toni_85 · 04-22-2016, 04:51

I think you have to check lcd ic

Sent from my iPhone using Tapatalk

biplobzakir · 04-22-2016, 11:42

http://qfs.mobi/f3152244

habibboxes · 04-23-2016, 23:16

Check ic power my friend take it off if no amperage absorbing at all change the ic power with a new one

HUM · 04-24-2016, 23:19

i already did wat u mention above

after remove power ic no auto amp comsume
so i change power ic but same

habibboxes · 04-24-2016, 23:23

Have you check components arround ic power voltage pinout by the schematic and tested jump ways for ic power???

HUM · 04-25-2016, 03:07

cant get this

tested jump ways for ic power

04-22-2016, 00:19	#1 (permalink)
HUM No Life Poster Join Date: Jul 2005 Location: karachi Posts: 8,673 Member: 161728 Status: Offline Sonork: 100.1582708 Thanks Meter: 2,237	i9300 no power need ur expertise history : recieve in hang /heating / sometimes null problem not water damage steps taken : change baseband ic reball emmc but same finally change small rf crystal ic but same i have doubt on this ic so i replace again but this time when i power on the phone its not on i chk on external power supply it takes auto amp(even i remove emmc/baseband/small rf ic but still take auto amp like in picture when press power key needle goes like this and after releasing power key needle returns pcb picture

04-22-2016, 04:51	#2 (permalink)
toni_85 Freak Poster Join Date: Nov 2013 Posts: 288 Member: 2070856 Status: Offline Thanks Meter: 62	I think you have to check lcd ic Sent from my iPhone using Tapatalk

04-22-2016, 11:42	#3 (permalink)
biplobzakir Insane Poster Join Date: Sep 2008 Location: BANGLADESH Posts: 89 Member: 867112 Status: Offline Thanks Meter: 41	http://qfs.mobi/f3152244

04-23-2016, 23:16	#4 (permalink)
habibboxes No Life Poster Join Date: Jan 2013 Location: lebanon Posts: 601 Member: 1869842 Status: Offline Sonork: 100.1625473 Thanks Meter: 186	Check ic power my friend take it off if no amperage absorbing at all change the ic power with a new one

04-24-2016, 23:19	#5 (permalink)
HUM No Life Poster Join Date: Jul 2005 Location: karachi Posts: 8,673 Member: 161728 Status: Offline Sonork: 100.1582708 Thanks Meter: 2,237	i already did wat u mention above after remove power ic no auto amp comsume so i change power ic but same

04-24-2016, 23:23	#6 (permalink)
habibboxes No Life Poster Join Date: Jan 2013 Location: lebanon Posts: 601 Member: 1869842 Status: Offline Sonork: 100.1625473 Thanks Meter: 186	Have you check components arround ic power voltage pinout by the schematic and tested jump ways for ic power???

04-25-2016, 03:07	#7 (permalink)
HUM No Life Poster Join Date: Jul 2005 Location: karachi Posts: 8,673 Member: 161728 Status: Offline Sonork: 100.1582708 Thanks Meter: 2,237	cant get this tested jump ways for ic power