Angel, Does it ever get above 21 Celsius? What temp are you trying to get it up to? Are the bulbs showing anything (are they turning red at all)?......I agree that it's strange that it won't heat up. And I understand that the control board is the same as before, but something must be missing. If I were in your shoes I would start by complete redoing the repair. Making sure that nothing was missed and everything is installed correctly. If problems persists after that, then I would insure that the oven is getting the correct voltage and amps. Those little ovens usually pull around 20 amps to get to heat settings. My bet is that either a cable is in the wrong spot on the control board or terminals, or for some reason the oven isn't getting enough amperage to hit temp. Start by checking voltage at the plug, then voltage at the terminal block. If your settings are correct and nothing is loose, then I would look at the amperage and voltage. You could have bad heat bulbs, but it would be weird if they all went bad at once, unless there was some kind of electrical short that caused the oven to malfunction in the first place. In that scenario I could imagine that maybe all the bulbs went too. My suggestions: 1. Triple check the repair work, make sure EVERYTHING connected correctly. If no results go to step 2. 2. Make sure the outlet is providing proper voltage and amperage (this is where I think the problem is, just a guess) If everything is good there, then step 3. 3. Replace bulbs I hope any of this helps.

Do you have any experience printing DTF?

Yes, I've worked for multiple companies such as Coldesi, Kornit & STS Inks

Have you ever run into banding in dtf prints? If so, what was you resolution?