Philips 50P8341 50" Rear Projection Television "wont remote start work im" Questions

...remote or on tv channel buttons,the channel number will change but the picture wont. The last issue is while watching,the sound will cut out,pictures fine but no sound. It seems all these issues ...

...remote can i use the menu screen to unlock it if that's a dlp unit they are garbage ive had two and both died in same manner in less than a year one the bulb blew on in three months after purchase ...