Sorry about my english, i'm hungarian, but I'll try to explain my problem. I'd like to clean inside my television, 'cause my picture quality has problems. The picture of the tv is quite dark, and I think It's not 'cause of the bulb, but the dust inside the machine. I bought this TV by a carpenter, he used this TV next to the workplace in his home, and I'd like to clean out the dust inside. I've removed all the screws from the back of the TV and I'd like to take off It's back (the piece with the mirror on it), but that does not want to come down...Shall I do anything else except the screws removal? Thanks a lot. And once again: sorry for the language, I hope you understand...