O.k then at this point I can tell you that the POP sound is not a good sign and that some component (s) have gone defective.
Without a blink code it would be very difficult to say which part of the tv went defective.
The power board would be the first suspect but then the horizontal and high voltages circuits would also be contenders in this case.
I`m afraid that those TV's were not an easy repair and definitely not what I would recommend as a "do it yourself " job in this case as we are dealing with high voltages.
You most likely will need the help of a local repairman in this case and I can tell you that to repair any of the circuits I described above, it would cost you some 300 to $350 to have it done at home.
If you go for the repair shop option then click on the link below and enter your zip code ;
This will give you a list of repair shops in your area.
You could give a call to different shops in your area to get an idea of their rates , this is a bit like buying insurances , it pays to shop around.
Wish i had better news and an easier solution for you today but i hope this help and I will be in standby if you have any questions.
Thank you and please take the time to rate my answer if that answers your question and you can still reach me here at anytime after this chat is closed if you have other questions.
Please note that from where i`m sitting there is just so much that i can do but give you my experience in tv repairs and if you are going to rate my answer below O.K service then please do not rate at all , just let me know.