What 'display lottery' looks like
Open lid: sometimes screen is dim. Sometimes flickers. Sometimes coloured tint. Sometimes works perfectly.
Behavior changes depending on lid angle, recently sleep/wake, ambient temperature.
Hours of normal use, then suddenly the next lid-open gives a faulty display state.
Common on 2016-2019 MacBook Pros, especially after 4+ years of use.
Root cause: display cable wear (flexgate stage 1)
Each lid open/close flexes the display cable that runs from logic board through the hinge to the screen.
After 20,000-50,000 flex cycles (typical 4-6 years use), cable insulation cracks. Some traces work, some don't, depending on physical position.
Why 'lottery': the angle of the lid changes which specific traces are conducting. Different positions → different displayed faults.
Diagnostic confirmation
Test: slowly tilt lid through angles. If symptoms change predictably with angle = flexgate cable issue. If random regardless of angle = different problem (panel itself or GPU).
Connect external monitor. If external is clean = display assembly issue (cable or panel). If external is also affected = GPU/board issue.
Fix 1: Display cable replacement
Apple offered free repair until 2023 for affected serial ranges. Now out of programme.
AppleForce cable replacement: PKR 18,000-28,000 fitted depending on model. 1-2 day workshop time.
Lasts 4-6+ more years before potential recurrence · modern replacement cables are typically more robust.
Fix 2: Full display assembly replacement
If cable is integrated to panel (some 2018+ Pro models), needs full display assembly swap.
AppleForce: PKR 55,000-110,000 depending on model. 1-3 day turnaround.
More expensive but guaranteed fix.
Models specifically affected (Apple's repair programme list + AppleForce experience)
MacBook Pro 13" 2016 (A1706, A1708) · high rate.
MacBook Pro 15" 2016 (A1707) · moderate rate.
MacBook Pro 13" 2017-2018 (A1708, A1989) · moderate.
MacBook Pro 15" 2017-2018 (A1707, A1990) · moderate.
MacBook Pro 13"/15" 2019: better cable design, lower rate but still occurs.
MacBook Pro 14"/16" (2021+ Apple Silicon): redesigned, very low rate.
Workaround while waiting for repair
External monitor for desk use. Reduces lid-flex cycles.
Avoid laptop-on-bed slouching · different lid angle each time accelerates wear.
Don't close + reopen frequently. Use sleep/wake without closing the lid when at desk.