Color Classic resuscitation

[mikem]

Hello,
I have been trying to get my color classic working after being in storage. The symptoms are it's just completely dead. Nothing when I hit the power (although when you turn the rear power switch on you can hear the faint sound of the tube being energized. I originally pulled the MB and took a look (I didn't see anything exploded). I then replaced the battery. That didn't work, I had read that if you leave it hooked to mains for a day sometimes that's enough to get it to spring to life. I did that, and to my surprise the computer actually did start up (ish). I got a white screen and no chime. It also sounded really loud vs what I remember. Since it was just hung I turned if off from the back and now it won't kick on again (I'll try again tonight). I'm going to pull the case off and take a look at the other boards. Does anyone have any suggestions?

 

[Performa]

Since it "turned on" after a day of soaking, I'd think power supply caps- though I'm far from an expert on the Classic range of Macintosh machines.

I'll tag @Pezdude on this one, he might be able to steer us in the right direction.

I'm happy to help however I can to get your Mac back on the road!

 

[Pezdude]

Oh my goodness! Sorry for the late reply!

This may be a dumb question, but what keyboard are you using with the Color Classic? The Color Classic won't properly power up without an ADB keyboard with the power button on it. The Color Classic will be able to properly work without the battery thankfully. If you could provide a picture of the motherboard, we can determine what revision it is as Apple had a tendency to do little changes here and there during that computer's lifespan.

Thanks and sorry again for the late reply!

 

[Pezdude]

Also, there were many popular modifications done to the Color Classic when it released due to Apple purposefully "neutering" its capabilities. Some of these mods may have been done with bodge wires which overtime may have become loose. For more context about the power, the computer will "power on" (receive power to the motherboard) even without the keyboard, but won't boot.

Hope some of this helps!

 

[mikem]

Oh my goodness! Sorry for the late reply!

This may be a dumb question, but what keyboard are you using with the Color Classic? The Color Classic won't properly power up without an ADB keyboard with the power button on it. The Color Classic will be able to properly work without the battery thankfully. If you could provide a picture of the motherboard, we can determine what revision it is as Apple had a tendency to do little changes here and there during that computer's lifespan.

Thanks and sorry again for the late reply!

I tried a few keyboards, all with the power button. I’ll post an image of the motherboard.