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This board sometimes no power. If I reconect the battery it works again 1,2 days and then no power again. I need to reconect battery each time. Any idea?
Battery charge, discharge correctly. Can see the %
PPBUS with battery 8.42V
I found corrosion arround Q5530. I replaced this and checked it goes to C5411 but still the same.
I measure on C5411 and I have 3V and 0.5V in both pins. This is on the faulty board that run slowly.
On another full working board I have 0.5V in both pins. Any hack I can do? Any idea how to solve...
This iMac sometimes not power. When I plug to 230V 1 led is on. When press power sometimes iMac power and all leds are on and sometimes first led power off and iMac will not power. Already replaced the power board and same problem. COuld be some short in GPU or most time is board issue?
This board seem to be not liquide damage. No magsafe or magsafe only with chines adapters.
PPBUS - 12.26V
SMC_RESET_L - 0V
Checked U5110 and arround is ok, no missing or corroded resistors/traces. VIN to pin 1,3 at 3.3V
Next to check?
PPBUS is 12.58V but goes to 12.50 for 10 seg and then to 12.33V for 1 seg. and back to 12.58V
3.3V S5 stable
5V and other rails pulsing each 7 seg.
ISL and SMC area look clean and no liquide damage. SCL and SDA at 3.42V
What is first? SMC, ISL or something else?
820-3462 no backlight
I replaced LP8545 and the same.
BKLT_EN - 3.09V
LVDS_BKL_PWM_RC - 3.3V
FB - 6V
SDA and SCL - 3.3V
VIN and VLDO - 5V
VDDIO - 3.3V
All 6 returns resistors 0ohm. And all them 0.648 to ground.
PPVOUT_S0_LCDBKLT - 12.58V