Hello.
Have this 27" iMac, that suddently after 2/3 yearsin storage wont start. when i connect power i was hearing some electric sparks sound from back of PSU. i wigle whole mac and it start with chore. so i remove PSU to check, but there is only AC input and output to board and see no bad connections. i resoldered big chips but nothing changed.
when i measure it outside i found that only 1.3V on SDA/SCL pins. no PS_ON voltage or other voltages
what can i measure to have better understanding where is problem?
anybody know what voltages should be active when connected to power?
i think that SCL/SDA should have 3.3V and PS_ON should have 3.3V and PP12V_G3H_ACDC should be 12V
Have this 27" iMac, that suddently after 2/3 yearsin storage wont start. when i connect power i was hearing some electric sparks sound from back of PSU. i wigle whole mac and it start with chore. so i remove PSU to check, but there is only AC input and output to board and see no bad connections. i resoldered big chips but nothing changed.
when i measure it outside i found that only 1.3V on SDA/SCL pins. no PS_ON voltage or other voltages
what can i measure to have better understanding where is problem?
anybody know what voltages should be active when connected to power?
i think that SCL/SDA should have 3.3V and PS_ON should have 3.3V and PP12V_G3H_ACDC should be 12V
Attached Files