1080 VS 480

Replace it if you want true HD. The TV has 640 × 480 pixels (dots) in use for 16:9 or 852 × 480 dots for 4:3. This translates to 480p or SD resolution.

You can watch an HD signal with downconversion. You will also need a digital to analog converter for OTA signals since the TV doesn't have a digital tuner (ATSC in the US) It reads NTSC, PAL, PAL60, SECAM, Modified NTSC signals in the following formats: 525 (480) / 60i · 60p, 625 (575) / 50i · 50p, 750 (720) / 60p · 50p, 1125 (1080) / 60i · 50i · 24p ·25p · 30p · 24sF ···· SMPTE274M, 1250 (1080) / 50i.

I hope this helps.

Cindy Wells

The Program you watching sets the res. If you watch a HD 1080 Program it will switch by its self. Most programs are 480 still and you can't watch 480 in 1080 format.

It has to be an HD DirecTV receiver for you to get anything about 480i. When you had an HD receiver you can select the resolution you want, up to 1080i.

You don't.
It should automatically switch to 1080 when and only when there is a HD signal present. Otherwise it will be in 480 and you will need to use the format button on the remote to change the picture size. If it does not switch to 1080 and you know for sure you have a true HD signal present, there is a problem with the unit.
Hope this helps,
Skyassoc

is your dvd player is a blue ray or hd dvd ? if it is you need to go into the setup menu of the dvd and set it for 1080. if it's just an older dvd player it will be at 480

needs to be hooked to the tv with either an hdmi cable or componet(blue/green/red.yellow/white/) also check the game on the back of the box. some games are only made for 480 and 720

IYou have to have your comcast box tuned to a channel that is broadcast in HD. On your Comcast remote hit menu. This will bring up several icons, one is HD. Select that icon and it will bring up the TV Guide for just HD channels. Select one and tune to that channel. Once your on that channel use your original remote and hit menu, then advance features, then go down to video display and change it from 480 to 980 or 1080. Let me know if this helps.

Do you have the HDMI out in your Xbox??

The input is auto switching for the resolution.

check to make sure that you have all the cables plugged in for that model you need a total of 5 cables for the HD input. 3 component(red,green,blue) and 2 audio(red,white)

I had this same problem, got my HD installed yesterday w/ Direct TV, have had this TV since '02. The fact that is wasn't working, and Google, led me to your post in search of answers. I even went to a local retailer that sells the Mitsubishi TV's and they were as helpful as if I had gone to a drug store seeking the answer. So, between browsing other posts, and then going to the manual (who'd of thunk) I got my, and your, answer. You need to do the following, nothing magic: 1)Connect the component video output of the Direct TV HD Receiver to the DTV inputs on your TV. The COMP 1/2 inputs are NOT 1080 compatible, only the DTV input. As another poster said, you must use component video cables, not the old red/yellow/white cables. you can lose too much signal quality w/ the old R/Y/W cables and your TV still won't recognize the 1080. 2)Set your receiver to a HD Channel, which are in the 70's. 3)Use the format selection on your remote and select until you get the 1080i Standard (or whatever your preference is) format. 4)Enjoy Bottom line is the COMP inputs are not HD. Page 64 of the manual (at least the one i downloaded from mitsubishi-tv.com) is what gave me the final piece of the picture. Good Luck!