TIPS:
1. Before you do anything, unplug the printer and hit the power buttons a couple times. Now wait about 10 minutes and you are ready to start working on the machine.
2. When taking the dampers off the head, use a flat head screw driver as a lever to push up on the tab on the left side of each damper and steady the damper gently with your finger. This will make sure that the damper is pulled off straight up and minimizes the possibility of breaking the manifold.
3. Be careful with the spring in front of the head. You have to take it off before you take the head out but it likes to go flying. I usually have a magnetic bowl ready to catch it or just hold it with tweezers. Once it flies, it is almost impossible to find.
4. Once you have the old head out, clean the area where it used to be with solvent cleaner to get all of the built up ink off. This prevents the new head from sticking and not being able to align it.
5. When putting the dampers back on, wet the manifold with cleaning solution so that the, preferably new, dampers slide on easily.
6. Check the head cables before plugging them in to the head. Are they damaged? Corrosion? Ink splatter on the silver leads? Yes? Change them. If no, install them as straight as possible and pull back if it doesn't feel right. If a cable shorts out, you will be in for a headache.
7. Double check all of the cables to make sure they weren't accidentally pulled out half way or knocked crooked. If everything looks good, turn the machine back on.
8. A lot of people change their own heads successfully. If you consider yourself as a DIY kind of person, you are good enough to do it right. It's all about taking your time and not letting certain things frustrate you. If something isn't working right and you are getting angry, take a break. People get angry and force things which is where most mistakes happen.
9. The tech manual will tell you to empty the machine of ink before you start. You can do that and waste money or just have a large wad of paper towels ready for the few ink drops that will happen. If you change the dampers too, remember that the ink will fall out for a second when the damper is taken off. This is normal and should stop fairly quick. Just have the paper towels ready. The rest of the ink will recede back to the cartridge.
10. The tech manual might also tell you the wrong way to get into service mode. The correct way is:
Back power switch on but main power off (the screen should be dark)
Push these buttons in order one at a time: Down, right, left, up, right, down, left
Now Press and hold: Left, Down, Right and push the front power button to turn it on.
You have to do all of this within 5 seconds so it does take a couple tries. If you fail it will say, service mode protected.
Have fun!