> On Jan 27, 2016, at 11:57 AM, Eric Volker <[email protected]> wrote: > > I’m actually pretty lucky as far as longevity goes. My old mid-2007 iMac will > still run the latest OS, making it among the oldest devices to do so. Even > so, it has a few problems. > > Chief among them is what I think is a bad heat pipe on the GPU - it rapidly > overheats if I play any 3d games. I had already blown out the dust, and it > still overheated. I contacted a local Mac shop and they said the repair was > impossible - the logic board would have to be replaced. I rather doubt this, > but don’t have any way to confirm it. Has anyone out there replaced their > heat pipe in their iMac? I’ve replaced the hard drive in my iMac, but it was > pretty hairy. Can an end-user replace the GPU heatpipe? In the meantime, I’ve > got some fan control software helping keep the Mac cool, but it’s putting a > lot of wear and tear on the CPU fan. > > My second question relates to Boot Camp and Windows. The logical version to > install would be Windows 7, but only 32-bit OS’s are supported on this iMac. > Where on earth would I find a 32-bit version of Windows 7? > > My third question relates to the screen. It’s gotten these subtle horizontal > yellow streaks on the screen that from what I’ve read are from the CCFL > backlights. Is there any way to get rid of them without replacing the screen? > > Thanks, > > Eric
The gas inside the heat pipe probably has leaked out. The entire heat sink/pipes/radiator assembly can be replaced. The logic board has to be removed in order to do so. Get the Apple Service Source “shop manual” or go to ifixit.com for instructions on remove/replace. It’s not difficult, just tedious. The assembly can be purchased on eBay. Be prepared to replace the thick white thermal pad between the heat sink proper and the GPU chip on that little board. Thermal paste won’t work. 32-bit versions of Windows 7 on DVD usually are in the package with the 64-bit version if you’re buying a full install copy. Replacing the CCFL backlights is a job for pros. I tried it once. Never again. Get another screen or live with it. After all, you’ve gotten almost 9 years out of an iMac. Time to move on, perhaps, to a new-er machine. Jim Scott -- -- You received this message because you are a member of the iMac Group, a group for those using Apple iMacs and eMacs. The list FAQ is at http://lowendmac.com/imac/list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To leave this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/imaclist --- You received this message because you are subscribed to the Google Groups "iMac Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
