Chosen Solution
I order a power supply for a DP42D23 and don’t see the power supply anywhere in the back of the tv. I used the model # to order it. There is only one board in the back of the tv.
@knwlech post some images of what the back opf your TV looks like with the back off. Use this guide so we can see what you see. Anyhow, the attached image shows the power supply.
I think I found the problem, the chassis number was different, my last two #’s were 11 the one I ordered was 00