I'd start new discussions with the following.
1) One problem per discussion. In your case discuss one machine per discussion.
2) We need the exact hardware specs.
Query by serial number
Apple's warrenty database will identify the type of Mac you have. Your serial number is securely sent, but you get only the name of your machine.
This site provides more information, but lacks security.
"A serial number is a unique, identifying number or group of numbers and letters assigned to an individual piece of hardware or software. It's used for various things depending on the product / brand but what is your Mac's serial number for and more importantly... what is it hiding and what can it do for you ?"
Restore Tiger 10.4 & Leopard 10.5 DVDs are available from Apple by calling 800-767-2775 as of January 20, 2013. Have your serial number ready. Have your credit card ready too. There is a small fee.
3) If you want to curate a museum, you need to look sharp. Spend some time reading these related communities. I've learned a lot doing so.
I Had A Wierd Problem With An iMac G3.
Ok, I Was On It, And The Screen Went Fully Black, <( as an aside:> I Did Have The Old Version Of OS 9, That Somehow Had Some Of The Old Software From An Apple Classic.
How Could That Be Possible? < ) >
< You can set up these machines to have a classic environment so that you can run classic apps. >
So, When The Screen Went Black, I Heard Something An iMac G3 Wasn't Supposed To Do, Yes, It Was The Sad Mac Chimes Of Death!
< could have been a power surge/outage. Happened to me the other day. Got sound. Thought maybe my machine was a goner. >
Sad Mac Then Appeared, And When That Happened, I Thought My iMac Was Gone, Then It Restarted For Somewhat Reason, And It Displayed A Kernel Panic. What Should I Do?!
You may want to run these "standard" fixes if the problem persists.
1) Check the amount of free space on your harddrive. You should have a several gigs free.
2) You should run disk utility
Macintosh-HD -> Applications -> Utilities -> Disk Utility
a) verify the disk
b) update your permissions.
3) Try a safe boot.
Shutdown your machine. Hold down the shift key. Poweron. Wait awhile Wait awhile while you harddrive
is being checked.
4) You need to get into single use mode for steps one and two that are listed below.
This page will tell you how to get into single user mode.
Basically, you hold down the command + s key then powering on your machine. The command key
has a little apple symbol on the lower left. It is between the alt/option key and the space bar.
On a PC keyboard, it will be the windows key, I think.
5) Run hardware diagnostics. It's good for a sanity check.