jmpage2: Would a broken RAM slot (the notch that holds the ram tight) cause this problem? It's been running this way for several years with no issues.
jmpage2: Would a broken RAM slot (the notch that holds the ram tight) cause this problem? It's been running this way for several years with no issues.
I couldn't say for sure. I've just seen RAM issues of any kind cause some pretty weird and strange problems.
For example. We had a buddy who had a machine that ran Windows 2000 for a year with some upgraded RAM and he never had an issue.
He upgraded to Windows XP and the machine would crash, reboot, etc.
Removing the RAM and putting some new RAM in fixed the problem completely.
I would say that your hard drive could also be the issue but that should be easier to diagnose. There are some pretty good programs for testing both the RAM and the Hard Disk actually.
I think if you google search "linux boot ram check" you will find a disc that runs memtest as well as a hard drive check.
The memory tests that are good will test the RAM for hours, writing bit combinations, then reading the results, etc, and really stressing it out.
I've had sticks that ran fine for 20 minutes and then threw errors, then ran for for 20 minutes again. Something like that could easily go unnoticed until you were doing something involved like installing a new OS.
*Linux*?! UGH!. No, all you need to do is insert DVD 1 of the restore discs, and reboot the Mac holding down 'D'. Linux is an extra complication, which is NOT NEEDED.
http://support.apple.com/kb/HT1509
After reading your success with swapping out RAM, it hit me that I could be having the same issue. I had upgraded my 1Gb of factory RAM to 3Gb (1Gb + 2Gb) and realized that this could be one of those not-having-a-matched-pair-of-DIMMs issues so I put the original 512Gb x2 that came with it back into the machine, launched the installer, and bingo- that did it! I am now Snow Leopard equipped. Thanks for all of your help guys!
For completeness the other things I have tried that didn't work .....
1. Cleaning the DVD drive with one of those cleaning CD's with brushes
2. Reformatting the Hard Drive
3. Borrowing a freinds copy of Snow Leopard and also Leopard (was upgrading from Tiger)
4. Weeping
None helped.
I know this is an old thread, but i just went through this and came out with what fixed this upgrade to snow leopard. short story .... my RAM. 2009 MacBook pro had a 1gb stick and a 2gb stick. Took my sons 2 and 2 gb sticks of RAM from his Macbook. Installed it in place of the Odd Ball Pairing of a 1gb and a 2gb. Install/upgrade went like a charm. Hope this helps someone. Long story, I tried EVERYTHING ELSE!