Mortentoft
Member
Hi good people.
I do not need help for this this time - but would like to share an experience with 820-01949 (A2251).
I've got a mbp 2020 with clean/pure logicboard. Client said that it suddenly died - Took 5v and 0.250 amp in. One of the thunderbolt ports bootlooped every 2-3 seconds.
I thought it was U3060 and other Thundebolt ROM because I have experienced that the issue could be found here (several times) They were all good - so no issue here.
I thought there might be some signs when looking at it in my thermal camera but it did not help very much. I looked at the hot spots shown on the camera and after I measured around the U2800_T (under shield) I did found a short. The short was under the U2800_T.
Repair of the area and donor U2800_T it came back to life!
How could there be a short under U2800_T with a clean board? I really do not not know! The client used a modified charger but could that be the main reason. I don't think so?
I hope it is okay to post this kind here.
Greetings Morten
I do not need help for this this time - but would like to share an experience with 820-01949 (A2251).
I've got a mbp 2020 with clean/pure logicboard. Client said that it suddenly died - Took 5v and 0.250 amp in. One of the thunderbolt ports bootlooped every 2-3 seconds.
I thought it was U3060 and other Thundebolt ROM because I have experienced that the issue could be found here (several times) They were all good - so no issue here.
I thought there might be some signs when looking at it in my thermal camera but it did not help very much. I looked at the hot spots shown on the camera and after I measured around the U2800_T (under shield) I did found a short. The short was under the U2800_T.
Repair of the area and donor U2800_T it came back to life!
How could there be a short under U2800_T with a clean board? I really do not not know! The client used a modified charger but could that be the main reason. I don't think so?
I hope it is okay to post this kind here.
Greetings Morten
