sekidata
Member
I have this A2141 that came in with no power. I found a dead left USB port (heavily corroded plug receptacle). With a good USB board, the plug still did not work (USB meter turned on & off repeatedly), so I suspected damage to the CD3217. I replaced both CD3217s on that side (U3100 and U3200) from an identical donor board.
Now I get 5V on all four ports, but no 20V or any signs of life. PPBUS is 12.3V. No shorts on any big coil. The only (maybe) abnormal finding is that PP3V3_G3H_RTC_X appears to be less than 100 Ω to ground, but shows a steady 3.3V when powered. I'm using a 96W charger.
Where to look next to get 20V established?
Now I get 5V on all four ports, but no 20V or any signs of life. PPBUS is 12.3V. No shorts on any big coil. The only (maybe) abnormal finding is that PP3V3_G3H_RTC_X appears to be less than 100 Ω to ground, but shows a steady 3.3V when powered. I'm using a 96W charger.
Where to look next to get 20V established?
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