Hi - hoping someone has some advice on this one.
My iMac (27 inch Late 2013) has developed a strange clicking noise that appears on a cold boot for only a few mins. It sounds really bad, but after a few minutes of the machine being on it completely goes away and then runs silent.
It also only happens during a fully cold boot after the machine has been powered off for a significant amount of time (24+ hours). I can shut down and power up multiple times throughout the day now and not recreate the noise, even leaving the machine off for a few hours in-between. The only reason I knew it would make a noise this morning is the machine has been powered off over the weekend.
No other symptoms. Machine runs perfectly normally, and is completely silent in operation as it has always been. Machine is typically on all week as I'm working from home, absolutely no other issues.
I presumed it may be either the fans of the HDD, as they have moving parts but so far my testing has indicated anything wrong, I've:
- Given the rear fans a good air blowing to remove any dust
- Downloaded MacsFanControl and ran the fans on maximum for a period of time - no noise generated
- Ran SMART testing on the HDD and no errors found
- Read/Write large volumes of data to the HDD - no noise generated
- Ran a few benchmarking apps to tax the machine - no noise generated
- Downloaded a more advanced HDD SMART analysis app - no errors found
My internal HDD is only a data drive as I've moved my OS to run from a portable SSD about a year ago.
A 1 min video with the noise in is here:
Any thoughts? I've read that it may be the power board failing but can't find any other info.
My iMac (27 inch Late 2013) has developed a strange clicking noise that appears on a cold boot for only a few mins. It sounds really bad, but after a few minutes of the machine being on it completely goes away and then runs silent.
It also only happens during a fully cold boot after the machine has been powered off for a significant amount of time (24+ hours). I can shut down and power up multiple times throughout the day now and not recreate the noise, even leaving the machine off for a few hours in-between. The only reason I knew it would make a noise this morning is the machine has been powered off over the weekend.
No other symptoms. Machine runs perfectly normally, and is completely silent in operation as it has always been. Machine is typically on all week as I'm working from home, absolutely no other issues.
I presumed it may be either the fans of the HDD, as they have moving parts but so far my testing has indicated anything wrong, I've:
- Given the rear fans a good air blowing to remove any dust
- Downloaded MacsFanControl and ran the fans on maximum for a period of time - no noise generated
- Ran SMART testing on the HDD and no errors found
- Read/Write large volumes of data to the HDD - no noise generated
- Ran a few benchmarking apps to tax the machine - no noise generated
- Downloaded a more advanced HDD SMART analysis app - no errors found
My internal HDD is only a data drive as I've moved my OS to run from a portable SSD about a year ago.
A 1 min video with the noise in is here:
Any thoughts? I've read that it may be the power board failing but can't find any other info.
