crwdns2933423:0crwdne2933423:0
crwdns2918538:0crwdne2918538:0

crwdns2934243:0crwdne2934243:0 oldturkey03, [deleted], BenZ78, Geir Ove Andersen, and NR26 crwdns2934247:0crwdne2934247:0

crwdns2947189:0crwdne2947189:0:

No Backlight and Bootloop

crwdns2934249:0crwdne2934249:0:

Hello Community,

I’ve got a question and I hope somebody can help me.

I changed the Lightning Connector and Battery on my IPhone 8 and now the Phone doesn't turn on again.

I can see the apple appear in a dark screen with no backlight but it seems to hang in a loop because it disappears and comes on again and so on.

What could be the mistake there? It's not the first repair on an IPhone and I made everything exactly like mentioned in the repair guide. I checked the connectors visually and could not find any damage.

Thank you for your help in advance!

BR

Edit: The phone itself seems to be alive, because today the alarm went of, I can set it to snooze mode and I can charge my Phone via the wallplug.

I measured the voltages and resistance now. If I get the schematics of the J5700 Connector right, the 6 Pins from 37-47 are for the Backlight? These are the Values I got with my Fluke 179 in Beep Mode:

37 - 502 Ohm, 39 - Overload, 41 - 398 Omh, 43 - 612 Ohm, 45 - 523 Ohm, 47 - 612 Ohm.

I also checked the Voltages with the Battery attached and the values where:

37- 0V, 39 - 0V, 41 - 0V, 43 - 0V, 45 ~2.6V, 47 - 0V

So could anybody help me where I would have to look for the Problem further? I guess 39 should normally have a Voltage reading too? Or would it be a better Idea to go to a repair shop with the half disassembled Phone and let them do the further work?

crwdns2866306:0crwdne2866306:0:

iPhone 8

crwdns2915684:0crwdne2915684:0:

open

crwdns2934251:0crwdne2934251:0:

+718265

crwdns2934245:0crwdne2934245:0 LindnerG

crwdns2947189:0crwdne2947189:0:

No Backlight and Bootloop

crwdns2934249:0crwdne2934249:0:

Hello Community,
I’ve got a question and I hope somebody can help me.
I changed the Lightning Connector and Battery on my IPhone 8 and now the Phone doesn't turn on again.
I can see the apple appear in a dark screen with no backlight but it seems to hang in a loop because it disappears and comes on again and so on.
What could be the mistake there? It's not the first repair on an IPhone and I made everything exactly like mentioned in the repair guide. I checked the connectors visually and could not find any damage.
Thank you for your help in advance!
BR
-Edit: The phone itself seems to be alive, because today the alarm went of and I can set it to snooze mode. And i can charge my Phone via the wallplug.
+Edit: The phone itself seems to be alive, because today the alarm went of, I can set it to snooze mode and I can charge my Phone via the wallplug.
+
+I measured the voltages and resistance now. If I get the schematics of the J5700 Connector right, the 6 Pins from 37-47 are for the Backlight? These are the Values I got with my Fluke 179 in Beep Mode:
+
+37 - 502 Ohm, 39 - Overload, 41 - 398 Omh, 43 - 612 Ohm, 45 - 523 Ohm, 47 - 612 Ohm.
+
+I also checked the Voltages with the Battery attached and the values where:
+
+37- 0V, 39 - 0V, 41 - 0V, 43 - 0V, 45 ~2.6V, 47 - 0V
+
+So could anybody help me where I would have to look for the Problem further? I guess 39 should normally have a Voltage reading too? Or would it be a better Idea to go to a repair shop with the half disassembled Phone and let them do the further work?

crwdns2866306:0crwdne2866306:0:

iPhone 8

crwdns2915684:0crwdne2915684:0:

open

crwdns2934245:0crwdne2934245:0 LindnerG

crwdns2947189:0crwdne2947189:0:

No Backlight and Bootloop

crwdns2934249:0crwdne2934249:0:

Hello Community,
I’ve got a question and I hope somebody can help me.
I changed the Lightning Connector and Battery on my IPhone 8 and now the Phone doesn't turn on again.
I can see the apple appear in a dark screen with no backlight but it seems to hang in a loop because it disappears and comes on again and so on.
What could be the mistake there? It's not the first repair on an IPhone and I made everything exactly like mentioned in the repair guide. I checked the connectors visually and could not find any damage.
Thank you for your help in advance!
BR
+
+Edit: The phone itself seems to be alive, because today the alarm went of and I can set it to snooze mode. And i can charge my Phone via the wallplug.

crwdns2866306:0crwdne2866306:0:

iPhone 8

crwdns2915684:0crwdne2915684:0:

open

crwdns2934241:0crwdne2934241:0 LindnerG

crwdns2947189:0crwdne2947189:0:

No Backlight and Bootloop

crwdns2934249:0crwdne2934249:0:

Hello Community,

I’ve got a question and I hope somebody can help me.

I changed the Lightning Connector and Battery on my IPhone 8 and now the Phone doesn't turn on again.

I can see the apple appear in a dark screen with no backlight but it seems to hang in a loop because it disappears and comes on again and so on.

What could be the mistake there? It's not the first repair on an IPhone and I made everything exactly like mentioned in the repair guide. I checked the connectors visually and could not find any damage.

Thank you for your help in advance!

BR

crwdns2866306:0crwdne2866306:0:

iPhone 8

crwdns2915684:0crwdne2915684:0:

open