It's the HDD (My book essential) I used, but it's hard to turn on the power, and finally I can't turn on the power.
According to the investigation, it seems that 5V, 2.6V and 1.0V power is not supplied before U3 (IC).
The LED flashes if the power is not turned on for a while, but the power is not required.
Do you have any good advice?
Thanks for reading.
I hope it will give advice to other people in need.
Q2 (0v, 2.7v, 0v)
R90 (5.17V, 5.17V)