Is Apple Display Image Persistence A Widespread Problem?

Mac OS X Core 2 Duo 2.8 GHz 24 inch icon

Here is another hot topic that has caught the eyes of a lot of Mac users lately at Apple Discussions. It’s about a persistent image issue on the Apple LCD display. One topic was posted by a Mac user named Jeremy Summers in March 17. (See Screenshot 01.) This particular topic has been since viewed 12,288 times. And there was another similar topic posted several hours ago.

Apple iMac restarts shutdowns fix
Screenshot 01 –
Source: Apple Discussions
  Apple iMac restarts shutdowns fix
Screenshot 02 –
Source: Apple Discussions

Jeremy says there are some sort of persistent images comprised of text and icons appearing on the iMac display even after the computer was rebooted. (See Screenshot 02.) And his concern has returned 78 replies so far.   Continue reading

iMac Core 2 Duo – Sudden Restarts and Shutdowns: Faulty Cable to Blame?

Mac OS X Core 2 Duo 2.8 GHz 24 inch icon

There’s one topic we’ve been recently keeping track of under Using your Intel-based iMac at Apple Discussions. As of today, this 2-day-old post has been read more than 1,350 times. (See Screenshot 01.) One Mac user initiated a topic by saying that his or her refurbished iMac starts up with no problem but that it frequently restarts and shutdown itself. So far, this post has returned 32 replies. A dozen people or less share the same restart/shutdown problem. And a couple of Apple Authorized Service Providers (AASPs) or equivalent have jumped in.

The original topic goes

I recently bought a refurbished iMac from Best Buy. When I inspected the unit after I unpackaged it, nothing appeared wrong externally. Also, the setup and installation of the OS went smoothly. However, after turning it on and browsing the web on Safari, the iMac suddenly shuts down. I thought that the power cord might’ve had a short in it at first, but have since moved away from that conclusion. Now, whenever I turn on the computer it will boot up fine and then suddenly shutdown or restart.
And as I write this, there is a new symptom: as soon as the iMac loads the desktop, the fans start up really loudly and then the computer shuts down.

(See Screenshot 02.) One AASP technician says replacing the power cable will not fix the problem, which probably doesn’t surprise anyone. How about removing the cable that connects the logic board to the CD/DVD drive? One says disconnecting this cable fixed the restart/shutdown on his iMac.   Continue reading

Replacing Hard Disk Drives on iMac 2.8 GHz Core 2 Duo (iMac Early 2008)

Mac video tutorial

Exactly two months ago, we wanted to open the cover of our iMac 2.8 GHz Core 2 Duo to see the motherboard. We found out that reaching a hard disk drive was way tougher than we had imagined. This time, we really have to reach the existing hard disk drive behind the LCD panel. We’ve purchased a new 1-TB hard disk drive as a replacement. We want to have more space on a Windows partition. We want to have more space on a Mac partition as well. We have so many dreams… with little disk space.

Tools that you need in reaching the hard disk drive on this iMac model are the same as before. Actually, if you have a smaller torque driver than Size 8, that will help a bit. There are a lot of small torque screws used on the motherboard. I don’t know the exact size. But don’t worry about it.

iMac Early 2008 MB325 replace hard disk drives
Screenshot 01 – Source: MacHouse

Screenshot 01 shows our new 3.5-inch SATA hard disk drive manufactured by Hitachi Global Strategy Technology. The capacity is 1 TB (931.51 MB). The interface speed is 3 GB/s. The exact part name is Deskstar HDT721075SLA360. The price was 7,480 yen or about US$78.   Continue reading

Opening up iMac 2.8 GHz Core 2 Duo (iMac Early 2008)

Mac video tutorial

A few days ago, we installed two RAM cards to increase the RAM size of our iMac 2.8 GHz Core 2 Duo (Early 2008 or MB325) to 4 GB. That’s a 10-minute job, and anyone can do it. Meanwhile, inspecting the whole surface of the machine has made us wonder how we can open up this computer to replace hard disk drives? There are no screws to loosen up at the bottom of the machine or anywhere except for the RAM access door.

iMac Early 2008 MB325
Screenshot 01 – Source: MacHouse
  iMac Early 2008 MB325
Screenshot 02 – Source: MacHouse

We liked our iMac G5 2 GHz (Ambient Light with no iSight), which is now dead possibly because of its faulty power supply box or defective/damaged motherboard. You can easily open up this model to reach such parts as CD/DVD drive, hard disk drive, RAM cards and PRAM battery. All you have to do is to loosen up three screws at the bottom. (See Screenshot 01-2.)

iMac Early 2008 MB325
Screenshot 03 – Source: MacHouse
  iMac Early 2008 MB325
Screenshot 04 – Source: MacHouse
  iMac Early 2008 MB325
Screenshot 05 – Source: MacHouse

Anyway, it took us a while to figure out where to look to find hidden screws so that we can see the internal hard disk drive or anything inside iMac 2.8 GHz Core 2 Duo. It must be under the glass. In order to open up the latest line of iMacs (Early 2008), you need a few tools. One is a Phillips screw driver. If you have two different sizes, that will be nice. (See Screenshot 03.) Another must-have tool is a torque driver. The size is 8. (See Screenshot 04.) If you have ever installed a RAM card in your PowerBook for yourself, you should have the size of a torque driver that you need. Apple has been using the same size of torque screws for portable Macs for more than a decade. And you also need a tiny Flat Slot screw driver or something to life up the glass. I’ll just use a sucker or whatever the name of this object is. (See Screenshot 05.)  Continue reading

Will A New Battery Save iMac G5 2GHz?

Mac video tutorial

I sometimes mention here that something went wrong with our 17-inch iMac G5 2GHz (Ambient Light). Many Mac users reported 3 to 4 years ago that the iMac model before this one had a power failure issue due to defective capacitors and/or a bad power supply box. Our iMac started having an odd problem in March and the operating system experienced a frequent kernel panic. Three months later, an internal fan started running fast with a horrible noise. Then it started having a rampant issue with Ethernet and FireWire. Back in July, we started having trouble turning it on. And it eventually died to the extent that it no longer turns on itself whether or not I reset the Power Management Unit (PMU).

We often go to Apple Discussions to see if other iMac users have the same issues. I am aware that several people have reported a dead iMac is back after replacing the internal battery. (See Screenshot 01.) So should we try putting a new battery?

iMac Early 2008 MB325
Screenshot 01 – Source: Apple Discussions
  iMac Early 2008 MB325
Screenshot 02 – Source: MacHouse

Hmm… It has never occurred to us that replacing the internal battery will solve our iMac G5 issues. So we didn’t even want to spend some five bucks buying a new one. I have a very old PowerBook 5300 (See Screenshot 02.). When I was still a graduate teaching assistant, I kept running it in the sleep mode without power supply in my office. Several months later, the green sleep light stop blinking because the battery went out. But I could still turn it on with power supply, which suggested to me that the battery was used to run the internal clock.  Continue reading