Impossible to get USB activity (or any video), without VCORE...
Try DFU restore.
Try DFU restore.
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820-01521 no power
- Thread starter Paky46
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Do you get VCORE now?
Which big coils get voltage now?
Check PM_SLP_S0_L and PVCCIO_EN.
Post U8110 voltages; pins 3, 13, 14.
Then you should have voltage at L8102.
Check diode mode to ground, if not.
Check diode mode to ground, if not.
That means short.
Lift L8102 one side and check where the short remains.
Lift L8102 one side and check where the short remains.
Very likely dead CPU.
Just in case, inject 1-1.2V and check on IR cam if something else gets more hot than CPU.
Remove CPU heatsink first.
Just in case, inject 1-1.2V and check on IR cam if something else gets more hot than CPU.
Remove CPU heatsink first.
I don't understand what you've meant.
You may have 4-5 ohm there (0.003 in diode mode I suppose).
Nothing wil heat to detect with finger.
That's the reason I said to use IR cam; can show you small temp differences.
You may have 4-5 ohm there (0.003 in diode mode I suppose).
Nothing wil heat to detect with finger.
That's the reason I said to use IR cam; can show you small temp differences.