Chosen Solution

how much would it cost me to have it replaced?

Miko Acu, Toshiba remains a company that feels the service manuals are sacred and not to share. So, the issue here is that we will not know the part numbers. I recommend that you try to disassemble your TV and take a look at the LCD panel itself. You should find a manufacturer and a model number on that. With those numbers, you might find the right LCD. As for the cost, in the past I found the LCD’s more expensive than a new TV. You could consider finding a non-working TV with your panel on places like ebay and use the panel from that. Hope this helps, good luck.