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Thanks for your help, but its taking too much time and I give up. God bless y'all

- Used 2 different known good original magsafe 2. - Yes, it appears w/ and w/o known good battery. - No news in SMC bypass or safe mode. Why that problem "go away" temporally when I enable color filter? What really change on screen? This machine is really testing my patience!

Made PRAM reset 5 times, also SMC, no news Tested with known good USB macOS, no news Tryed to reinstall on a new SSD, impossible. Black screen or image flickering after apple logo.

I received today another 820-00165 today for cleaning and will check differences between boards. The U7200 suspect I had is not valid. This one is unstable too, so that's not the problem, it is the normal operation.

The backlight is working good every time, no instability. That was my first guess too. The U7200 is where things are strange to me. CPUVR_FCCM, CPUVR_PWM and CPUVR_PWM1 are stable until flickering starts.

Thanks! SMC_LID is 3.3v stable. Checked on R5171. U7701 replaced, nothing changed. No liquid damage, board is nice and clean.

Hi guys, first post here. This A1466 - 820-00165 display starts flickering and blinking a few moments before the end of system bar startup running. When the login screen appears, I almost can't see. This is not happening with the external monitor. Tried a new display and the same happens. If I...