Chosen Solution

Hi this is related to a dead MBP (2010) which shows green light on charger and nothing else. I had earlier tried to locate the U7000 chip and measured voltages around that and had asked experts to help me on this. I have now managed to get a board view file and the circuit schematics. Here are some data that with 65W magsafe adpter connected

  1. DCin board is ok with all voltages intact.
  2. voltage after F6905 16.7 V going to pin-2 of U7000.
  3. Q7080 status pin-1 ,-2 & -3 : 16.7 V, pin-4: 15.52V and pin-5: 17.25V
  4. Q7085 staus pin-1,-2,& -3: 16.74V, pin-4: 11.38V, and pin-5:fluctuating (0-16.6V)
  5. Q7030 status pin-1,-2, &-3: 16.7 V, pin-4: 15.5V and Pin-5: 17.22 V
  6. Q7055 looks like non-functional (voltages at all pins fluctuating betn 2.2 to 12.55 V
  7. U7000 status Pin-2: 16.76 V; pin-3: 2 V; pin-6 and -7: 3.42 V, pins-9,and -12 : 3.42V, pin-13: 3.4V; pin-16: 0 to 5V , pin-17 and -18: 2.2V to 12.5V; pins-19 and -20: 5.1 V, pin-23:2.2-12.6 V, pin-24: 4.73 to 14.7 V I feel U7000 needs to be replaced so also Q7055. Experts, please suggest. Thanks.

Please don’t give the individual pin voltages, give us voltages for the G3H power rails (PPBUS_G3H, PP3V42_G3H, etc) and S5 power rails. It will take too long for us to go through all of the pins you have said. Fluctuation on dc in voltages is usually a nightmare to solve. Give a list of all the power rails and it will be easier for us to give you advice.

I have an issue where batter doesn’t get recognized, won’t charge(no orange light). u7000 pin16 showing 12v leading to Q7055 pin4. Changed u7000 and Q7055 and checked the capacitors and resistors on that circuit. Do you think this is an issue between u7000 and SMC?