bjf
Member
I'm getting my ass handed to me by this 2015 Air board. It had very light corrosion scattered in a few places, mostly around the 3V42 circuit and other PPBUS components, but not near the ISL6259 charging area, that all looks perfect and measures normally (voltage, diode.) 3V42 and PPBUS were always there and did not require any repairs to get them going. I have a normal MagSafe light, SMC reset works fine, SMC bypass causes a millisecond fan spin.
I've repaired and replaced components in every area that was even slightly damaged just to make sure there was nothing unexpectedly causing a failure. I've taken diode measurements against a good board and can't find anything off. I've reached the end of what I can do with it so if anyone has a helpful idea for a next step it would be greatly appreciated.
I have:
• 3V42
• PPBUS
• PPVRTC
• 5V_S5
• 3V3_S5
• 3V3_SUS
• PP1V05_SUS
I don't have:
• PP5V_S4RS3 (0V)
• PP3V3_S4 (0.346V)
• Every other voltage line on the Power Aliases page
I've repaired and replaced components in every area that was even slightly damaged just to make sure there was nothing unexpectedly causing a failure. I've taken diode measurements against a good board and can't find anything off. I've reached the end of what I can do with it so if anyone has a helpful idea for a next step it would be greatly appreciated.
I have:
• 3V42
• PPBUS
• PPVRTC
• 5V_S5
• 3V3_S5
• 3V3_SUS
• PP1V05_SUS
I don't have:
• PP5V_S4RS3 (0V)
• PP3V3_S4 (0.346V)
• Every other voltage line on the Power Aliases page