Working on an 820-3330 board that works perfectly, but the SD slot does not work. When I insert an SD card and measure pin 14 on J3300, it stays at 3.3v instead of going low (compared to working board as well--voltage drops to .000 once SD card is detected). Diode measurements are identical to a working board. Replaced U3300 & U3311, but no dice. All resistors check out fine, no damage in the area. SD port looks fine, no other issues with board. Something I don't understand is that pin 4 of J3300 (PP3v3_S0_SW_SD_PWR) doesn't have voltage at all (with or without card). It stays at 0v. It seems to be this way on a working board too, though, so I'm not sure what's up with that. Board is clearly in S0, but no voltage there. I would imagine that if the SD card isn't detected, it wouldn't send s0 voltage to the port (and that SD detect works off of 3v3 s4 voltage).
Any help appreciated. Hoping this isn't an SMC or even a CPU/PCH issue. Thanks in advance!
Any help appreciated. Hoping this isn't an SMC or even a CPU/PCH issue. Thanks in advance!
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