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Reballing smc did nothing. Today my donor arrived, replaced smc but nothing. After replacing u6901 sys one wire was gone. I checked on diode mode under smc with donor and found out sys one wire had a value completely wrong. Turns out the via was damaged but not too much. A small bridge fixed the...
i did not know that i could have a working cpu with dead outputs. interesting. i have replaced cpus before (in other machines), so in case i can replace this one too. Is it possible to source good ones?
i checkd and it seems clean. customer said it worked on external screen. i got image on external once. now nope. cpu is getting warm (not hot) i get 1.1 on l7270, l8050 and such, but i have no voltage on l7220 l7210 l7410 l 7420 l7430
they are all from 3 to 7 ohm to ground
got a pre worked on 820-00923, they replaced c7053 c7055 r8442 and edp connector. fan spin and all. no idea why they replaced all of that, they usc it so i have no clue remaining. i saw more oxidation on u8500 and u8501, repalced those to be sure but still no panel_3v3_en and panel p5v_en
hi got an a1502 820-3476 that had wd trackpad. customer replaced it but it didn't work. i tried another one and same, tried a known good one from another machine and still doesn't work. the button works fine. keyboard works fine. cable is brand new. no oxide on the motherboard and anywhere else...
hi, got this board that had a short on pp3v42_g3h near smc. very oxided. no oxidation anywhere else. received a good bath in my crest. the shorted caps were C4902 and c4905.
i have no fan spin not even shorting smcon naturally, but i do not even have magsafe light. i tried another magsafe...
ok after a FIGHT against this machine here is what happened:
replaced the cap many times with different stuff..no change.
reflowed mux after removing edge bonding. machine worked fine for 15min. then dead. turned back on to:
reballed and worked fine.. for 30mins or so.. then it died again...
i did use only on ram module.
the error was on ram test. but it stopped doing that with a corsair macmemory. although now it hangs directly. tried yet another bank on 10600 using a bit of thermal pad under the ram slot and it passed asd. gonna try to install hs and see what happens