Step 1
Place the CoCo upside down and locate all the screw holes.
NOTE: the blue circles are just to hold the keyboard in place. But, go ahead and remove all of them.

Figure 1a

Step 2
Carefully flip the unit over and remove to top shell. You should now be able to see some thing similar to figure 1b. There may be more shielding than shown.

Step 3
remove the screw above and below the Power supply (figure 1c), and unplug all the leads, make sure to label the 3 wires.

Step 4
You should now have the Power Supply disconnected. Carefully lift the Power supply straight up, and put it to one side .Careful to untwist the cord around the post.Now is a perfect time to inspect the PS to see if there are any burn (overheating) marks or leads that need to be re soldered. I recommend if you have the skill, to replace the 3 wires on the PS, because they can become stiff and brittle. Why risk a fire hazard for 20 Cents worth of wire and 3 blade leads. Also, if you can, replace the fuse with something a little more sturdy. If you can get a proper fuse holder and solder two wires to it. this can be tucked underneath the motherboard out of the way. if you get a socket type, just use a dremal or a drill to cut a small hole out the back.

figure 1b

Figure 1c.

Keyboard Removal
Step 5
Now that the power supply is removed, and all the screws underneath, CAREFULLY flip the keyboard up and towards the back, there is a Mylar ribbon that just "slides" straight in to the connector on the Motherboard and over time this can become stiff and fragile. To remove it, Just pull straight up and gently rock it back and forth(figure 2a).

An interesting note is that this Keyboard (unlike the White CoCo 1 has NO screws on the back and is just held together by clips (figure 2b). You can feel a difference in the typing also, as this keyboard feels a lot "looser" and cheaper than the white CoCo 1.

Figure 2a

figure 2b

Part 3 Motherboard

Good news! we are almost there

Step 6
Now the the keyboard off, you should see something similar to figure 3a.
Step 7
Remove the 3 Fastening screws that hold the motherboard in place.1 is located on the lower left hand side, below the Power supply and the other 2 or on the edge of the cartridge connector.
You can now Carefully grasp both sides of the Motherboard, and slide it straight up, over the screw supports and place it on the workbench.

Step 8
Now , if you will look, around the RF modulator, there is gold foil tape holding down the "RF shielding" Actually its just foil paper laminated into a cheap RF shield" Carefully, remove this tape, as you will want to re-use it later. fold back the "Shield" and you whole motherboard should be visible now. You can now remove the clips around the side to remove the back RF shield, if desired. Carefully take some compressed air and blow all the dust off the motherboard. Carefully inspect the motherboard for obvious signs of damage, burn spots (indicates blown components),and corrosion. You may have to re-solder some traces.

That's it. to put it all back together, reverse the steps.

figure 3a -Keyboard off

Figure 3b

But wait, now that its apart, lets take a closer look.True to what was stated on the CoCo 2 page, The Ram is soldered in place, But the ROM, CPU, and just about everything else is socketed, making a blown CPU easily replaceable.
(Figure 4a)

The following is the step by step guide that the manual suggest:

DISASSEMBLY

Disassembly of the Color Computer 2 is easily accomplished using only a Phillips screwdriver and a pair of long-nose pliers. Mounting screws for attaching the two halves of the housing are accessible from the underside of the unit. To disassemble the computer, follow the steps noted below.

1. Disconnect power and remove signal cables from the unit.
2. Remove the Cartridge from slot (if applicable).
3. Turn unit over and place it on a soft surface to prevent damage to the keyboard or top cover.
4. Loosen and remove the six mounting screws which attach the base to the top cover. These screws may not easily come out until the unit is turned over.
5. Turn the unit right side up. Carefully lift the top cover from the bottom cover and set it aside. Exercise care to prevent damage to the flat cable between the keyboard assembly and the printed circuit board.
6. Disconnect from the PCB the cable which is attached to the keyboard.
7. Tag the three wires from the transformer assembly at the left rear of the unit which are attached to the printed circuit board. Remove the wires using a pair of long-nose pliers.
8. Remove three screws which attach the PCB to the bottom case cover. If it is necessary to remove the shield from the PCB, do so by removing the eight clips which attach it to the PCB.
9. Remove the transformer form the unit by removing the two attached screws. Replacement of the pigtail fuse assembly should be accomplished using the same type and rating of fuse.