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OK, I tested pins on the Screen flex and pin 1 is shorted, this is a normal behavior when this screens goes bad? Also when it goes bad it blows the fuse? or its the opposite? Circuit goes bad and blows the screen?

i just have the screen of a late 2013, i dont think its compatible with this early 2013

But F9700 is blown and PPVOUT_SW_LCDBKLT has short when screen coneected only, remove screen short is gone.

Macbook Retina 15 820-3332 Board No liquid damage, but a lot of dust inside. No Backlight Image is OK. I´m trying to figure out if its a board problem, screen problem or board+screen problem. F9700 has no continuity PPVOUT_S0_LCDBKLT is shorting to ground when screen connected, diode mode(red...

Got it, just bought a Flex to try on it first! Get back when arrive.

Anyone more familiar with a1534 820-00244? Trying to figure if is a board or parts problem, don’t have any donors to test at this moment. Takes a little longer to boot, and no mouse or keyboard detected. One or two times, mouse worked, but it froze and powered off. Did some measurements and...

replaced u9000 and comonents on pin 2 line, its working! doing further tests! Tks!

2 - 3,18v 4 - 3,22v 6 - 3,21v 7 - 3,21v when doing the measures, questiom mark appeared, next reboot, didnt show again

it reads 3.22v

also just white screen on external monitor

PIn 9 665 pin 10 669

also reseted PRAM with USB keyboard and even if i wait long it wont show question mark or boot into OS

yes white screen, no image, connected HDD and USB system and nothing shows on screen

Replace L8550 again, now get backlight, chime, but no image! tried different LCDS panels

Changed U5511 just in case, no corrosion around or under. It gest its 3v. Now it wont get backlight, working on this now and get back

LCD_BKLT_PWM not present, tested without lcd. With LCD image present.

Errors on EFI ASD: TA0P ambient air- SMC IO failed TC0P cpu proximity- SMC IO failed TM0P memory proximity- SMC IO failed Th1H fin stack test 1- SMC IO failed Errors on OS ASD: Chipset: Dmi Error Check - PCi driver IOServices open error TA0P ambient air- SMC Cannot read sensor TC0P cpu...

FB line seems ok, I'll try to replace U9701

continuity OK from a5 to pin2 on D9701

820-2936 board severe liquid damaged! Missing tracks from LCDBKL_DISABLE Had to drill a hole on the board cause PPBUS_SW_LCDBKL_PWR was also missing BKL_EN 2.89v PPBUS_SW_LCDBKL_PWR 12.45v Still no backlight! Replace U9701?