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820-01700 - No power - 20V 0.8A
- Thread starter ronaldo
- Start date
DFU should complete before passing to Intel side.
Not sure on this model but I can confirm successfully completed DFU revive on A1989 shorting 3V3_S5 to ground.
This way breaks the power on sequence before accessing Intel side; that board had fried CPU.
Just in case, try the same here.
Make a short over C8176 and try again DFU.
Not sure on this model but I can confirm successfully completed DFU revive on A1989 shorting 3V3_S5 to ground.
This way breaks the power on sequence before accessing Intel side; that board had fried CPU.
Just in case, try the same here.
Make a short over C8176 and try again DFU.
The T2 that I replaced is from same lb model. But I just realize that the original T2 from the board I'm trying to fix is
h9hknnnBRumuvr-nlh and the donor T2 is
h9hknnn8Kumuvr-nlh.
Both board has 1TB storage.
Is this relevant?
LDO0: 0.195 normal reading on tis line is 0.253.
I already remove those 2 caps from that line and replaced again the U7800 and the voltage drop is still 0.195.
Could this indicate that the 2nd T2 is faulty.
Thanks.
h9hknnnBRumuvr-nlh and the donor T2 is
h9hknnn8Kumuvr-nlh.
Both board has 1TB storage.
Is this relevant?
LDO0: 0.195 normal reading on tis line is 0.253.
I already remove those 2 caps from that line and replaced again the U7800 and the voltage drop is still 0.195.
Could this indicate that the 2nd T2 is faulty.
Thanks.
Both T2 are compatible, if is the same SSD size.