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820-00923 A1706 with missing SSD. PP3V3_S5_SSD is 0,785V. Just wanted to measure around Piccolo Current Sense and - everything's missing. Just to be sure, there should be U5920, R5920, R5925, C5920? Also looks like U5910 is missing...
I tried to install OS X before i opened the Thread. I just tried it again with USB Installer and there's no SSD recognized. Questionmark Folder also still coming up.
Check SSD basic signals; SSD_BOOT_LB_L, SSD_PWR_EN_LB_L, STORAGE_LB_EN, SSD_RESET_LB_L, SSD_PCIE_CLKREO_LB_L, LPSR_EN_LB_L.
If possible check 100MHz SSD clock with o-scope, or frequency meter.