iMac A1311 EMC 2389 Not powering up
Hello,
I have an iMac A1311 EMC 2389 helping a friend fix it.
Suddenly it wont power ON.
Checked on AC power the cpu fan runs continuously but no chine is heard when power button is pressed.
If I hold power button for long the fan eventually turns off. Also a subsequent press of the power button will then prompt the fan to run once again but no chime.
I have taken off the LCD and inspected LEDs
Only LED 1 keeps steady on with AC power supply the rest keep OFF when power button is pressed.
The PSU gets input 240v
Voltage psu pin 1 & 4 is 12v
voltage psu pin 1 & 12 is 12v
voltage psu pin 1 & 11 is 12 v when power button pressed.
Any directions from here or help with schematics and board viewer will be highly appreciated
Thanks and Regards!
Cette question est-elle utile ?
2 commentaires
Was this the issue from the start?
Or, did you do something to the system before this? If you were working on the system what where you doing?
par Dan
Hi Dan
This system was this way when I received no work done on the boards at all. I am the first to open up the device I believe havent done anything except the multimeter readings given above @danj
par Imran