Short while restoring in recovery mode

Question

iPhone X

Released November 4, 2017. Model A1865, A1901. Available as GSM or CDMA / 64 or 256 GB / Silver or Space Gray. (Pronounced the same as "iPhone 10.")

crwdns2934591:020crwdne2934591:0 crwdns2934593:0crwdne2934593:0 | crwdns2947278:066crwdne2947278:0 crwdns2947270:0crwdne2947270:0

Jonas Geschke @kegesch

crwdns2934065:0crwdne2934065:0: 25

6

2

crwdns2931729:0crwdne2931729:0: Sun 3, 2021

crwdns2933897:0crwdne2933897:0

Short while restoring in recovery mode

This board always causes an error while restoring (usually error 4015 but last time it was error 9).

Log:

<Restore Device 0x7f8235cd1f70>: operation 80 progress 1

[12:09:55.6073] requested restore behavior: Erase

[12:09:55.6110] <Restore Device 0x7f8235cd1f70>: operation 80 progress 1

[12:09:55.6111] requested restore behavior: Erase

[12:09:58.6406] <Restore Device 0x7f8235cd1f70>: operation 18 progress 0

[12:09:58.8493] RestoreOS mode device disconnected

[12:09:58.8493] RestoreOS device removed before restored completed

[12:09:58.8498] recv(13, 4) failed: connection closed

[12:09:58.8498] unable to read message size: -1

[12:09:58.8499] Failed to receive message from device, might be connection problem with USB host.

I attached a DCPS and it draw 120 mA while in recovery mode. While restoring the current jumped higher than 200mA (my MM is broken so I could not see how much it really was) and stayed this high after this error occurred. I don’t think it’s normal behaviour.

What lines can I check that would produce this?

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2853045:0crwdne2853045:0 crwdns2853046:0crwdne2853046:0

crwdns2889612:0crwdne2889612:0 1

crwdns2944067:03crwdne2944067:0:

just one way: localize a short. Split the board, should be a twice easier :-) (you know what I mean).

crwdns2934271:0Sun 3, 2021crwdnd2934271:0 bert.harmidomski crwdne2934271:0

There is no way we can help diagnose this over the internet unless you can give more information.

• How did it become like this?

• Have you tested it in a known good housing to rule out parts?

crwdns2934271:0Sun 3, 2021crwdnd2934271:0 Chris Stables crwdne2934271:0

Originally this logic board had a short on vdd_main, which I have fixed. After joining the boards together, everything worked like for 2 hours and then it suddenly crashed and was stuck in recovery mode.

I think I didn't join the boards correctly. I was using a normal stove and a hairdryer. It seemed like a pretty good job for me. But probably there was too few solder left.

I now seperated it again and bought proper equipment, such as a heat gun and the correct solder to reball it.

crwdns2934271:0Sun 11, 2021crwdnd2934271:0 Jonas Geschke crwdne2934271:0

crwdns2934285:0crwdne2934285:0

just one way: localize a short. Split the board, should be a twice easier :-) (you know what I mean). — bert.harmidomski
There is no way we can help diagnose this over the internet unless you can give more information.

• How did it become like this?

• Have you tested it in a known good housing to rule out parts? — Chris Stables
Originally this logic board had a short on vdd_main, which I have fixed. After joining the boards together, everything worked like for 2 hours and then it suddenly crashed and was stuck in recovery mode.

I think I didn't join the boards correctly. I was using a normal stove and a hairdryer. It seemed like a pretty good job for me. But probably there was too few solder left.

I now seperated it again and bought proper equipment, such as a heat gun and the correct solder to reball it. — Jonas Geschke

iPhone X

Short while restoring in recovery mode

crwdns2934229:0crwdne2934229:0