hi, i am just workin g on this device, no problems to see on the board
first green led is lightning, no reaction by pressing power button
pwr_btn_l ckecked
platform reset is still low
i have 3.41V, 3.3V_s0 and 5V s0 and 12V_S0
I dont have PP5V_S4_REG
PP3V?V_S5_REG is ok
both enable Signals on 7600 are there
replaced already u7600, but no change, checked R7656, R7603, R7650, R7672, R7670, R7671, R7659, R7650 all ok
checked q7650 and q7655 in diode mode, nothing to find
no short on L7650 to GND
what else could be the problem in the imac?
first green led is lightning, no reaction by pressing power button
pwr_btn_l ckecked
platform reset is still low
i have 3.41V, 3.3V_s0 and 5V s0 and 12V_S0
I dont have PP5V_S4_REG
PP3V?V_S5_REG is ok
both enable Signals on 7600 are there
replaced already u7600, but no change, checked R7656, R7603, R7650, R7672, R7670, R7671, R7659, R7650 all ok
checked q7650 and q7655 in diode mode, nothing to find
no short on L7650 to GND
what else could be the problem in the imac?