I have a Samsung 50" DLP rear projection television with LED (model#HLT5087SAX/XAA) and here are the problems... The TV plugs in and turns on normally but I can't turn it off using the power button(on tv or remote) if the tv turns off by sleep mode(it only does that if nothing is plugged in, it doesn't turn off if I'm watching something) I can turn it back on by the power button... the channel change and volume up and down work fine(on tv and remote) but every other button doesn't (menu, source, Etc.) I want my tv to be able to switch to source so I can use the HDMI... it was on HDMI before but I accidently pressed the channel down button... and and the channels only go between 1-99 it doesn't go through source channels... so I just want to know what the problem is so I can fix it... the brightness is also low so I would like menu to work so I can change that... Thank you...