I did read the post, I'm not a f**king idiot, but you got a replacement tv (whether it's new or not it doesn't matter, it still has to work right?) which is already showing issues out of the box (I was presuming it came in a box and not just bubble wrapped?), was the used one just from a shop or something? I thought you had maybe had it replaced by insurance and they had offered you that? A new one or a better second hand tv for the same price?
If its just a random second hand purchase, then again, is it from a shop, if so, surely you can take it back for being defective?
I'd want it sorting, but I'd have gone for the new one for the same price that toshiba offered me.
Anyway, I'm out, you've already given the main reason I would never choose a plasma.....but as you've now got ir issues I'm guessing you will take it back anyway?