Dead MacBook Pro - No SMC reset and no charging
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.
2. Q7080 status
pin-1 ,-2 & -3 : 16.7 V, pin-4: 15.52V and pin-5: 17.25V
3. Q7085 staus
pin-1,-2,& -3: 16.74V, pin-4: 11.38V, and pin-5:fluctuating (0-16.6V)
4. Q7030 status
pin-1,-2, &-3: 16.7 V, pin-4: 15.5V and Pin-5: 17.22 V
5. Q7055 looks like non-functional (voltages at all pins fluctuating betn 2.2 to 12.55 V
6. 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.