Common desaster with the Avant 1st gen. You will have to let a certified B&O technician do this job - the new DVE has to be programmed for the tv in case. I have never heard of anyone doing this on his own. MM

Happened twice on my Avant, and I guess it will happen again. I believe the design is too thin and heat slowly kills the DVE. If the set will be on for a long session, remove the back plates. There is no chance to replace the DVE on your own. It takes several hours for a skilled B&O technician to replace the DVE including reprogramming the set using a computer connected to B&O.

After it is repaired, @beowillie suggested using the pins on the USB connector to drive a tiny heat sink fan internally -- at half-voltage so it doesn't make noise -- and "strategically placing" it inside the case.  He rather hand-waved verbally on the BeoTalk podcast as to where he shoved it, but apparently with the case open this was obvious?

I did change the video engine myself after the reference for the faulty one were provided. I get a new board (might be a refactored one) and it took me around 30mn to install the bew board in the TV. It is not a complicated operation to do, as long as you have the service manual and the right screwdriver :) S.

Hi, from ebay? If you get a used dve you can change it by your self, but it have a different serialnumber then, thats doesnt matter if  pincode is known or disabled

Hello @Sergi0! Where did you find the board? Would there be any chance that you could provide a more detailed description of the process?

Hi, I get the board from SkynexAV. I had to provide my Avant serial number for the new board to be compatible, but once I received it, I was able to remove the backplate of the TV and change the board. It is a couple of screws and connector to remove and replace. Being patient and taking pictures may help. Once it was installed, I don't remember if I had to enter a new PIN code, but as the TV is still working, I might have done it. Cheers, Sergio