Four NEW things:
1. One person got his unit working again by removing a layer of dust! Not sure if I can find that post again, but if I do, I'll post a link. Found it here (a channel problem but still might apply to any op problem).
2. Not sure if you saw my link to a 3575 user who posted a good instruction and tips on replacing his burner and noted his burner PN of N78P3DUN.
Lo and behold, I found a page on parts that includes the burner. They only list 3 parts to Add to Cart, but if you click on Detailed Description tab below the pic, they say to contact them since they have many parts available.
3. Don't trust the Funai support web site on parts availability, next to useless and often wrong!
Call the tel. # or email funaiservice as given in my help file and ask for BOTH the N78P3DUN (which they might not have and they'll refer you to Philips, even tho Philips sold that business to Funai), AND ask them about the Mag 2080 burner, N78F4DUN, which should also work if you don't install the Main PCB that comes with it, as explained before and in the help file.
4. Make sure you try the 3575 FW, as noted before by me and rkg22 above, to see if the machine was left in a state waiting for a FW update.
I tried to blow that dust off, but even with a can of compressed air, most of it is sticking to the boards....
I know when I searched for that part number via google, so few links showed up. Looks like one of the 3 items out of stock is back in stock even since I looked.(and over a weekend).and I never clicked on detailed info, interesting! Looks like I was not checking out that one post closely enough with the pics, so you can remove the burner without removing the 4 screws or the pcb(printed circuit board- I should have known what that stood for, but I didn't, have a lot to learn yet) I'll try to call Mon, and see what if anything I hear....Oh, I'll hook it up again(keep putting out of the way) and see what shows up on the screen on updates...