Archive for the ‘Power Supply’ Category
I normally leave my iMac on 27/7; but it does go to sleep during most of each 24 hour period. Recently, I have noticed that the iMac will not wake up from sleep in the mornings when I want to check for emails. In fact, it appears dead. I cannot hold down the button at the rear to get it started. I must first pull the plug and wait for a few seconds before plugging the power cord back in. Then I can press the power button at the rear and it comes up. However, a meaasge appears saying that the Mac was not properly shut down.The iMac does not feel hot, only slightly warm along the top. It appears that I have a power supply problem. What do you suggest?
While it may indeed be an issue with the power supply unit within the iMac, it may also be that your PRAM/PMU battery has stopped holding a charge. This can cause issues like failing to wake from sleep, forgetting what the time/date is if the unit’s unplugged, and even failures to start up normally. It would be a low-cost option to test prior to having a power supply replaced. Should a battery not resolve the issue, then the only other real option would be to check it into an authorized service center to have the unit bench-tested.
My brand new Nehalem, which has been running fine since I got it, will not power on – no response to the power button. I tried the SMC reset twice but no luck … Is there anything else I can do?
With the unit off, try holding in the power button for a long time until you hear Tone from the speakers. Release the power button and after a short time it should chime and boot. If that fails, than your Mac Pro could have a power problem. For diagnostic sake move it to a new outlet and directly connect the computer to the wall, bypassing any power strips. If it still will not work, then it will need to be looked at by an Apple Authorized service center.
Hope this helps, let me know,
Is there any way of fixing an original apple power supply?
Yesterday my 17″ MBP crashed out of the blue. I have to add, a few days before the battery went dead. Perfect timing! To be sure it wasn’t a internal hardware issue I used the power supply of a 15″ MacBook Pro and everything was fine. So instead of buying a new battery and a power supply maybe I can save some money by DIY.
Do you have any advise for me?
All the best,
I am sure that there is a way to fix an MacBook Pro power supply but I would not advise it.
I am the same type of person you seem to be. I will bust out a soldering iron instead of my wallet most times. Occasionally though, I just do not want to risk potential damage from a DIY project. For example when maintaining my car, I will not work on my own tires or breaks. This is because I value professional and inspected work when it comes to keeping me on the road, and stopping when I need to.
Just like tires, the computer’s Power Supply is where the “Rubber Meets the Road.” It is where the outside world connects to your computer and, just like a bad break job, errors in the repair can be costly. In general you will probably be able to make the repair and get a working power supply, but it is possible that a safety device will not get fixed and a power spike could damage your equipment.
In this case I would encourage you to buy a suitable replacement. To be honest I would not know how to advice you, as I have never attempted that repair before.
Hope this helps.
I purchased an iMac G5 1.8 ghz, 20″ LCD in September 2005.
Today I went to start it up, and it won’t start.
It was having issues in the last 2 days, in that the screen would suddenly go black, and then the fan would turn on high. It was running fine otherwise, but now, dead. I can’t even get it to start up.
Were there any extensions of the “iMac G5 Repair Extension Program for Video and Power Issues”? I note that this was to extend from 3 years of the original purchase date; I know that has passed.
In general Repair Extensions from Apple only last three years from the date of purchase.
It is possible that that it is just a failed power supply and those can be replaced. It would be best to have an Apple Authorized repair center look over the G5 iMac before swapping out parts though.