Re: IMAC 24 PSU Bad Caps replacement


There are 8 output pins on the board, but I checked them from the attached lead which has a further 4 for the HD power. I also checked from the 8 pinout connection, both tests carried out in the machine powered up.

I have just checked the PSB caps with a multimeter, out of the machine. 3 appear good, but 11 are reading down to zero....

Re: IMAC 24 PSU Bad Caps replacement

Thanks for that Toasty!!
I have checked the voltage outputs on the PSB, and only 3 are giving any readings. There are 12 in total. Of these, 2 readings are 1.2v, and one of 4v. Is it safe to say the caps are shot, even though they look fine??...

Re: New Members - please post your introductions here

Hi guys!
I'm another newbie, with limited experience in repair of TVs, usually by replacing the affected board(s). But I have also successfully replaced capacitors on power supply boards. Hoping to gain from the experience of others. Great site!!

Re: IMAC 24 PSU Bad Caps replacement

Hi guys!
I'm new to this too, so please go easy!!
I have an iMac Intel core 2 duo, with the 614-0387 power supply. It's faulty, in that when powered on it works ok, but after about 5 mins, the computer hangs and requires a restart. When I do restart, the computer hangs after a shorter period of time, and after restart, the hang happens even sooner. I'm assuming that the capacitors are bad, even though there is no visible damage. No bulging, and no leaks. Do capacitors always display these symptoms when bad, or is it possible that...