I've got an 820-01987 which the customer says just switched off. I've had a look under the microscope and there is no sign of any liquid damage to any of the components. It's been ultrasonic cleaned and after probing around I've noticed that all the AWAKE and SLPS2R rails are pulsing. These all come from the U7800. I'm getting a stable 3.3v on PP3V3_G3H_PMU_VDDMAIN and PPBUS is also stable 12.27v.
Am I correct in saying that the U7800 is faulty or is there anything else that it could be or I could check.
Thank you in advance
Am I correct in saying that the U7800 is faulty or is there anything else that it could be or I could check.
Thank you in advance