Hello,
I receive a MacBook Pro that does not want to turn on. I found there was a shorted U7310 (unsure if CPU is fried already). Replaced, fan spin and was ready to put together to test, but no longer getting a fan spin after unplugging and replugging charger. Checked ALL_SYS_PWRGD not present. Removed PWRGD resistors one by one and finally Q8150 which brought ALL_SYS_PWRGD back. Fan spins again, however there is 0 volts CPU vcore on all coils. I tried replacing U7200, no go. Measurements I think are pointing back to U7200, but is there anything else I should check?
Any advice? Thanks!
I receive a MacBook Pro that does not want to turn on. I found there was a shorted U7310 (unsure if CPU is fried already). Replaced, fan spin and was ready to put together to test, but no longer getting a fan spin after unplugging and replugging charger. Checked ALL_SYS_PWRGD not present. Removed PWRGD resistors one by one and finally Q8150 which brought ALL_SYS_PWRGD back. Fan spins again, however there is 0 volts CPU vcore on all coils. I tried replacing U7200, no go. Measurements I think are pointing back to U7200, but is there anything else I should check?
Any advice? Thanks!
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