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820-02098-A MBP A2442 booting without display connceted

M

macfix_hh_25

New member
Hi,
I've got a MBP A2442 with booting and display issues in the shop.
It came in for display repair, no backlight and not starting / booting.

With disconnected display cable the MacBook starts normally and boots to user login surface. (checked with external montitor)
With connceted display cable the MacBook starts to boot until keyboard and display backlight should come on. Then fails and reboots to the same status again and again.

could you please advice what to check and what could cause the issue?

Thank you very much in advanced!
 
2informaticos

2informaticos

Administrator
Staff member
If the problem appeared after display changed, check for mechanical damage.
Possibly damaged connectors, or knocked off components (near the board edge).
 
M

macfix_hh_25

New member
I've checked for for damaged connectors and knocked off components. It is all good and in place. I also tested with a different good working lid from an other machine but got the same results. (Starts booting and then fails).
I recognized a drop in voltage from 20.71V to 14.96V before booting fails
 
M

macfix_hh_25

New member
with camera and backlight conneceted, it starts normally. (Backlight doesn't turn on).
Only Backlight connected it starts normally (Backlight doesn't turn on)
only camera connected it starts normally

only EDP display connected, it fails to start
 
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