samsung la32s71b

[play_boy]

hi
i have samsung la32s71b
it was workin gud till last month but now when i tun it on it turns off itsel after 2 or 3 times it start wirkin but some snow on screen and when i use my remote it shows me boxes insted of numbers
can any1 help me
1 more thing can i use la31r81b's power supply n main board in this model
thanx