Still no schematics available?
I have one just with led on charging socket,white without battery and yellow with battery.
Power button get 3.3V and drop to 0 when pressed,but no visible reaction.
After investigation I found one knocked off capacitor on Vcc line of RT3661AB,datasheet say at least 2.2uF,replaced with 10uF
When power button pressed RT3661 get 5V
But missing power on BIOS chip.
Further investigation revealed some corossion on one resistor chip array 4x100K and one of resistor damaged,replaced that.After that I get 1.8V on pin 8 of BIOS chip.
Now when I press power button,fan start,at all coils of DC-DC converter I have some voltage but fan speed go to max and caps blink in sequence
5 long and 3 shorts blinks.
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