Traduciendo paso 7
Also, we need to replace with a new U6990. Let’s start with U6990 replacement.
Apply some BGA Paste Flux and solder a new chip with Hot Air Gun. Then run diode mode measurement of D6905 Pin 3 again. The measured value is 531, which is normal.
Next thing we do is to solder a new D6905. Then run diode mode measurement of three pins on D6905 one by one. The measured value is normal.