I'm no technician, just a fellow VersaCamm owner.
When you say 'servicing your heads" are you referring to ultrasonic cleaning or some such procedure?
If I knew my printer was going to be down for a while, I may have done a system purge with cleaning cartridges to remove the ink from all the lines and the remaining print heads.
Since your past that point now, may I ask if the machine is still returning to the capping station? If so, there's a chance the heads won't dry up.
Just keep cutting and hopefully restore the heads as soon as possible.
Are you able to run a test print even though 2 of the heads are missing?
I might do that daily to keep ink flowing through those lines, but only if I was sure I could somehow close down the lines feeding the 2 missing print heads.
Gathering dust is a bad thing for DX4 print heads. Print heads love to be run. They work best when fresh ink is going through them every day.
Print something every day, even 10 sq ft of vinyl if you can. Make a yard sign but keep the ink flowing through the lines.
I'm not saying the other 2 heads failed due to lack of ink flow, but I bought a used VP one time with SUPER low hours on the machine.
Less than 100 or so printing hours. I actually had to replace 3 of the heads because they printed super funky. I was told by a tech that they never printed enough
and so they deteriorated just sitting with ink in them. Print print print. When you restore the machine please let us know how it went. It might help others reading the post
later on.