On Oct 4, 2009, at 1:39 PM, Christian Wacker wrote:
> > My school is throwing out a bunch of old G3 iMacs with bad PSU\CRT > issues (logic boards are still good) > I have a 350mhz G3 Blueberry > Most of the systems are iMac DV systems > Could I put one of the DV boards in my system? > -Christian This has been covered many, many times on this list. The short answer is that you can put any G3 350-450 MHz logic board into any other original G3 350-450 iMac. All these have Motorola cpus. You also may be able to swap a 500 MHz G3 iMac logic board into your 350, IF it has a Motorola cpu. But there also were 500 MHz IBM cpu G3 iMac logic boards. WARNING: G3 500 Mhz iMac logic boards with IBM cpus will fit, but the cpu will not match up with the Motorola cpu's heat sink, which will cause the cpu to self-destruct very quickly. The same holds true for 600 & 700 MHz IBM G3 iMac logic boards. So, you can swap any Motorola logic board with any other original Motorola G3 iMac, and you can swap any IBM logic board with any other IBM G3 iMac, but you can't swap an IBM into a Motorola or vice versa. CAUTION: However, what you can do is swap logic boards and the matching perforated divider boards with appropriately positioned heat sinks into any G3 350-700 iMac. Of course, you have to completely disassemble the iMac to do this. And in the process, you have to disconnect the high-power lead from the flyback transformer to the CRT. This means you have to discharge the CRT using proper tools and safety technique. If an iMac hasn't been plugged in for a long time, there's not much chance of getting zapped. However, if the iMac's been plugged in recently for testing, there well may be some seriously aggressive electrons waiting for you to complete a circuit to ground with your body. -- 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 imaclist@googlegroups.com For more options, visit this group at http://groups.google.com/group/imaclist -~----------~----~----~----~------~----~------~--~---
