Assuming that this is a 10th gen Panasonic Plasma (which I can only assume from the date of purchase), 2 blinks is a loss of +15V DC on the power supply board.
It is often the power supply board (P Board) that is bad but it could also be the
D, H, PB, SC, SS, or DG boards.
There is a troubleshooting routine to determine which board is bad. I can walk you through this as I do with many of my customers. You would need a good multimeter that can measure volts and impedance and some basic tools. The back would need to come off the TV.
A typical board is about $100-$150 and that would be your total expense. If you decide to call in a tech, you can probably double that at least for parts and labor. You can find a tech at www.tvrepairpros.com
The TV will have to come off the wall. When it does, grab the model number so that I can revise my answer if necessary. I w ill be happy to help you for as long as it takes.
I'm sorry that there is no quick and easy fix for this problem. You definitely have a board failure inside the TV.
I'll be here if you need further help with this issue. Please let me know.