iMac G3 333 Mhz has a bit of a blurry screen

Hi Thomas and welcome to Apple Discussions,

There are two ways to do this: one using Apple Display Utilities and the other adjusting the flyback itself.

eMail me for complete instructions.

Richard

Hi Richard,

Happened on this thread... I picked up an iMac G3 500 mhz and am trying to get it up and running for my little girl. However, it is blurry. I don't want to ruin her little eyes!

Any tips? The utilities solution interests me. I'm wary of opening it up and zapping myself as some threads suggest.

Thanks,
Matt

This is pretty simple if you don't mind taking out a couple screws... >_> I've never used software to do the job, but rather I've always just taken the back off my iMacs and used a phillips screw driver to focus them. I have no idea what said method is called, or what the thing you adjust is called, but it works quite well. It's been awhile since I've done it, but I'm pretty sure you just have to take out the outmost piece of plastic on the iMac and then on the back left there are 2 "screws" that you can adjust. 1 is for focusing and the other was brightness I think. Sorry I'm not being very specific, but it's not something you do every day and I'm too lazy to go find a link. 😉

I almost forgot to add I've done this with a 333MHz (Purple Tray Loader), a 400MHz (Gray SE DV Slot Loader), and a 600MHz (Snow Slot Loader) iMac.

Message was edited by: 3xploiter

Hey 3X..,
Welcome to Apple Discussions,

I've never used software to do the job, but rather I've always just taken the back off my iMacs and used a phillips screw driver to focus them.

OK but I wish you'd use a plastic shaft of somekind to do that. The flyback where the 2 adjustments that you're talking about puts out 25 KV and it's regulated!

I'm pretty sure you just have to take out the outmost piece of plastic on the iMac and then on the back left there are 2 "screws" that you can adjust. 1 is for focusing and the other was brightness

Right they can be accessed by taking the bottom off, 4 screws. One is called "screen" and the other is "focus".

Richard

Hehe... I'll keep that in mind the next time I do it. 😉 You gotta realize I'm the kind of kid that rips apart electronics when they're working just fine simply so I can see the innards. :P I found the flyback completely by accident on my 333MHz tray iMac when I was like 13 and I had no sense of safety. I remember I turned the brightness one all the way up and the screen went pure white and then the computer died. >_< I imagine I made it pull too much power and it killed itself for safety.

3X...,

You gotta realize I'm the kind of kid that rips apart electronics when they're working just fine simply so I can see the innards. :P

I can dig that, been there.

I found the flyback completely by accident on my 333MHz tray iMac when I was like 13 and I had no sense of safety. I remember I turned the brightness one all the way up and the screen went pure white and then the computer died. >_< I imagine I made it pull too much power and it killed itself for safety.</div>
This is from the site below:
"increase the HV and the X-ray protection circuits may kick in."
Also there are other over amp protection circuits in there.
In fact Sam's site is a great place to learn about stuff like that:
http://www.repairfaq.org/

Richard

Message was edited by: spudnuty