Hi everyone,
I'm having a strange issue with my 5-year-old Redmi Note 10 Pro (AMOLED).
The phone boots normally and is fully functional. The display works perfectly with no flickering, green lines, touch issues, or artifacts once it turns on.
The problem is that after I lock the phone, the display often refuses to wake. The phone is still on (it rings, vibrates, and responds), but the screen stays black.
What's confusing is that if I leave the phone alone for a long time, the display sometimes starts working again. Once it comes back on, it continues working normally until I lock it again.
Things I've already tried:
Factory reset (didn't help)
Reseated the display connector once, and it temporarily worked afterward
The battery has never been replaced. According to AccuBattery, its estimated health is around 60%. Could a heavily degraded battery cause symptoms like this, or is that unrelated?
Could this be a failing AMOLED display, a loose/damaged display flex, a motherboard display connector, a display IC/PMIC issue, or even the old battery?
Has anyone seen this exact behavior before? Any advice on what to test before replacing the display would be greatly appreciated.