Galaxy s2 PLUS i9105 doesn't power on - GSM-Forum

legionXV · 07-25-2016, 22:28

Hello everybody, I've got a beautiful S2 PLUS i9105 in my hands... but it doesn't turn on. Actually the touch buttons light turns on after a while, but I don't know what does it mean. Before changing the motherboard or the display I need to troubleshot the exact problem first.

I downloaded the schematics already, but I don't know where to start test things actually...Could you please help me?

legionXV · 07-25-2016, 23:19

The suggested troubleshot diagram says I should measure the U400 output
I don't get how to measure it... the chip it's so freaking small! Am I missing something?
[sorry, I would like to post an image but I can't...too few posts still!]

clebo · 07-26-2016, 07:49

Why don't you check if it is not the lcd first before doing hardware troubleshooting

Sent from my GT-I9505 using Tapatalk

clebo · 07-26-2016, 07:49

There might be a hairline crack on the lcd told the screen and check with the magnify glass

Sent from my GT-I9505 using Tapatalk

legionXV · 07-26-2016, 21:27

It hasn't any hairline crack on the surface.. Is there a way to test it by using any tool?

legionXV · 07-26-2016, 21:54

Got another "hint". The phone has been recognized by my PC. I actually have access to all the data inside... So could it be the LCD display the issue?

clebo · 07-27-2016, 05:10

Yes it's the lcd

Sent from my GT-I9505 using Tapatalk

legionXV · 07-27-2016, 18:47

Okay, I'll try to swap it then.
One more thing: is the display the same as Galaxy s2 i9100? Or do I need to find the i9105 one?

clebo · 07-27-2016, 18:48

You can try im not sure

Sent from my GT-I9505 using Tapatalk

legionXV · 07-27-2016, 22:11

Yay! I've tried to swap the display with a i9100 one and it works wonderfully!
There's only one problem: the touchscreen seems completely uncalibrated... It doesn't work proprely, expecialy on the low side of the screen. Can it be adjusted?

legionXV · 07-27-2016, 23:32

I've checked on the net and I found that the displays are not fully compatible. I've buyed a proper screen on ebay... case closed!
Thank you for your help clebo

clebo · 07-28-2016, 04:36

You will have to test with another screen i have never calabrated a touch

Sent from my GT-I9505 using Tapatalk

clebo · 07-28-2016, 13:26

Glad to have helped you

Sent from my GT-I9505 using Tapatalk

07-25-2016, 22:28	#1 (permalink)
legionXV Junior Member Join Date: Jul 2016 Posts: 8 Member: 2603123 Status: Offline Thanks Meter: 0	Galaxy s2 PLUS i9105 doesn't power on Hello everybody, I've got a beautiful S2 PLUS i9105 in my hands... but it doesn't turn on. Actually the touch buttons light turns on after a while, but I don't know what does it mean. Before changing the motherboard or the display I need to troubleshot the exact problem first. I downloaded the schematics already, but I don't know where to start test things actually...Could you please help me?

07-25-2016, 23:19	#2 (permalink)
legionXV Junior Member Join Date: Jul 2016 Posts: 8 Member: 2603123 Status: Offline Thanks Meter: 0	The suggested troubleshot diagram says I should measure the U400 output I don't get how to measure it... the chip it's so freaking small! Am I missing something? [sorry, I would like to post an image but I can't...too few posts still!]

07-26-2016, 07:49	#3 (permalink)
clebo Freak Poster Join Date: Aug 2005 Age: 39 Posts: 223 Member: 176003 Status: Offline Sonork: bb pin 27883543 Thanks Meter: 74	Why don't you check if it is not the lcd first before doing hardware troubleshooting Sent from my GT-I9505 using Tapatalk

07-26-2016, 07:49	#4 (permalink)
clebo Freak Poster Join Date: Aug 2005 Age: 39 Posts: 223 Member: 176003 Status: Offline Sonork: bb pin 27883543 Thanks Meter: 74	There might be a hairline crack on the lcd told the screen and check with the magnify glass Sent from my GT-I9505 using Tapatalk

07-26-2016, 21:27	#5 (permalink)
legionXV Junior Member Join Date: Jul 2016 Posts: 8 Member: 2603123 Status: Offline Thanks Meter: 0	It hasn't any hairline crack on the surface.. Is there a way to test it by using any tool?

07-26-2016, 21:54	#6 (permalink)
legionXV Junior Member Join Date: Jul 2016 Posts: 8 Member: 2603123 Status: Offline Thanks Meter: 0	Got another "hint". The phone has been recognized by my PC. I actually have access to all the data inside... So could it be the LCD display the issue?

07-27-2016, 05:10	#7 (permalink)
clebo Freak Poster Join Date: Aug 2005 Age: 39 Posts: 223 Member: 176003 Status: Offline Sonork: bb pin 27883543 Thanks Meter: 74	Yes it's the lcd Sent from my GT-I9505 using Tapatalk

07-27-2016, 18:47	#8 (permalink)
legionXV Junior Member Join Date: Jul 2016 Posts: 8 Member: 2603123 Status: Offline Thanks Meter: 0	Okay, I'll try to swap it then. One more thing: is the display the same as Galaxy s2 i9100? Or do I need to find the i9105 one?

07-27-2016, 18:48	#9 (permalink)
clebo Freak Poster Join Date: Aug 2005 Age: 39 Posts: 223 Member: 176003 Status: Offline Sonork: bb pin 27883543 Thanks Meter: 74	You can try im not sure Sent from my GT-I9505 using Tapatalk

07-27-2016, 22:11	#10 (permalink)
legionXV Junior Member Join Date: Jul 2016 Posts: 8 Member: 2603123 Status: Offline Thanks Meter: 0	Yay! I've tried to swap the display with a i9100 one and it works wonderfully! There's only one problem: the touchscreen seems completely uncalibrated... It doesn't work proprely, expecialy on the low side of the screen. Can it be adjusted?

07-27-2016, 23:32	#11 (permalink)
legionXV Junior Member Join Date: Jul 2016 Posts: 8 Member: 2603123 Status: Offline Thanks Meter: 0	I've checked on the net and I found that the displays are not fully compatible. I've buyed a proper screen on ebay... case closed! Thank you for your help clebo

07-28-2016, 04:36	#12 (permalink)
clebo Freak Poster Join Date: Aug 2005 Age: 39 Posts: 223 Member: 176003 Status: Offline Sonork: bb pin 27883543 Thanks Meter: 74	You will have to test with another screen i have never calabrated a touch Sent from my GT-I9505 using Tapatalk

07-28-2016, 13:26	#13 (permalink)
clebo Freak Poster Join Date: Aug 2005 Age: 39 Posts: 223 Member: 176003 Status: Offline Sonork: bb pin 27883543 Thanks Meter: 74	Glad to have helped you Sent from my GT-I9505 using Tapatalk