Hello everybody:
I have an A1466 (MoBo 820-00165-A) which is driving me crazy.
It has all voltages, everything seems OK. It starts after connecting the Apple charger (fan spins normally; maybe a bit later than in a working board that I have side by side). The only (!!!) missing signal is the SPI clock.
I have measured at pin 6 of U6100 (the SPI), and I have nothing in the scope. Neither in the data in/out pints I have data train in the scope (just a little bit sometimes).
The working board is showing me fixed clock pulse at pin 6 of its SPI. I'm crazy about this. I had cleaned and reballed the SMC, but still the same effect: missing clock.
I've checked all terminators (all low ohm values), and everything looks and read fine (following both the schematic and re-checking it in the working board).
I will appreciate any kind of help in this regard.
TIA!!
I have an A1466 (MoBo 820-00165-A) which is driving me crazy.
It has all voltages, everything seems OK. It starts after connecting the Apple charger (fan spins normally; maybe a bit later than in a working board that I have side by side). The only (!!!) missing signal is the SPI clock.
I have measured at pin 6 of U6100 (the SPI), and I have nothing in the scope. Neither in the data in/out pints I have data train in the scope (just a little bit sometimes).
The working board is showing me fixed clock pulse at pin 6 of its SPI. I'm crazy about this. I had cleaned and reballed the SMC, but still the same effect: missing clock.
I've checked all terminators (all low ohm values), and everything looks and read fine (following both the schematic and re-checking it in the working board).
I will appreciate any kind of help in this regard.
TIA!!
Comment