pixel 7a screen not working properly

repaired a customers broken pixel 7a screen. phone will boot up and just before it gets to the lock screen< it will go black. occasionally it will come back and display the lock screen but then disappear again. i have tried 3 separate 'oem" screens with the same results. have also done the hard reset

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When it goes black, the phone continues to stay powered on, but nothing is on the display? Or the phone powers off altogether?

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The phone stays on, you can feel it responding to touch, but the screen is black.

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Question, have you tried to reinstall the pixel OS software? More often Pixel devices that have been repaired may need to have the software re-calibrated. Try this to see if it works: https://pixelrepair.withgoogle.com/carri...

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