720p is putting out signal of 480i or p only

You don't. The TV has a resolution of 1920 x 1080 pixels; so it's already 1080p. The number of pixels can't be changed.

What you're probably getting mixed up with is the TV showing the resolution of the incoming signal when you change channels or go to a different source. Standard definition from cable might be flagged as 480i. DVD might show either as 480i, or 480p, or maybe 720p or 1080i or 1080p if you have a scaling DVD player and set it appropriately. HDTV on cable or satellite will show as 1080i or possibly 720p. Blu-rays and PS3/XBox 360 or PS4/Xbox One should show as 1080p when your TV is connected.

Whatever the source signal resolution, the TV will scale it up to fill the panel area of 1920x1080 pixels. So the TV is always using all the pixels, regardless of the resolution of the source signal.

Since this is an older first generation (1999) HD TV it may not be compatible with newer HDTV receivers because the standards back then were different - Make sure the HD cable box is plugged into the HD component inputs on the back of the TV (not the DVD inputs) and that the menu setting on the TV is set to DTV (not RGB) video. This TV will only accept 480i and 480p signals on the DVD input. Also the HDTV input will only accept 480i,480p and 1080i (it will not work with a 720p signal,make sure your cable box is not set to that mode)

Yo don't. The TV's resolution can't be changed. Only the signal resolution from the source can be altered.

The TV is a fixed pixel device. The panel has a resolution of 1920x1080 pixels. The incoming video signal is scaled to fit that display. If the signal is 480i then it is deinterlaced to make it 480p, and then scaled up to make it 1080p. The amount of detail in the picture doesn't change. It's still a 480i image. It's just blown up to fill a 1080 panel.

The TV reports the resolution of the incoming signal before it is scaled. If you have a BD player you can see the effect of changing the resolution setting from 480p, to 720p, to 1080i, to 1080p 60, to 1080p 24. The last three (the 1080 resolutions) shouldn't look too different with a Blu-ray apart from movement because the native picture is 1080p 24 and the TV is simply converting it back to 1080p 24 for display.

960i is a funny resolution. That would be achieved by line doubling a 480i signal. But it's not one of the VESA HDTV timings. TTBOMK there's no Blu-ray or HD source that generates a 960i image. So even if you could generate it then the TV wouldn't understand what to do with it.

Video Output Settings Adjust the system's video output settings. Select the best output settings for the TV in use.
1.
Check the resolution supported by your TV.
Resolution (video mode) varies depending on the TV type. For details, refer to the instructions supplied with the TV.
2.
Select (Settings) > (Display Settings).
3.
Select [Video Output Settings].
4.
Select the connector type on your TV.
Resolution (video mode) varies depending on the type of connector used.
Input connector on the TV Supported video modes (NTSC region) *1 Supported video modes (PAL region) *1 HDMI 1080p / 1080i / 720p / 480p 1080p / 1080i / 720p / 576p Component / D-Terminal *2 1080p / 1080i / 720p / 480p / 480i 1080p / 1080i / 720p / 576p / 576i Composite / S Video *3 480i 576i AV MULTI / SCART *4 480p / 480i 576p / 576i *1 The video mode options vary depending on the region where the PS3™ system was purchased. In North America, Asia and other NTSC regions, 480i video mode is displayed as [Standard (NTSC)]. In Europe and other PAL regions, 576i video mode is displayed as [Standard (PAL)]. For details, refer to the instructions supplied with the product.
*2 D-terminal is a connector type used mainly in Japan. The resolutions supported by D1-D5 are as follows:
D5: 1080p / 720p / 1080i / 480p / 480i
D4: 1080i / 720p / 480p / 480i
D3: 1080i / 480p / 480i
D2: 480p / 480i
D1: 480i
*3 Composite is the connector used to connect the AV cable that is supplied with the PS3™ system. S VIDEO is a format mainly used in Japan.
*4 AV MULTI is a format mainly used in Japan. SCART is a format mainly used in Europe. If [AV MULTI / SCART] is selected, the screen allowing you to select the type of output signal will be displayed.
5.
Change video output settings.
Change the resolution for the video output. Depending on the connector type selected in step 4, this screen may not be displayed.
6.
Set the resolution.
Select all resolutions supported by the TV in use. Video will automatically be output at the highest resolution possible for the content you are playing from among the selected resolutions.*
* The video resolution is selected in order of priority as follows: 1080p > 1080i > 720p > 480p/576p > Standard (NTSC:480i/PAL:576i).

If [Composite / S Video] is selected in step 4, the screen for selecting resolutions will not be displayed.
If [HDMI] is selected, you can also select to automatically adjust the resolution (the HDMI device must be turned on). In this case, the screen for selecting resolutions will not be displayed.
7.
Set the TV type.
Select the type of TV in use. Set when only SD resolution (NTSC:480p / 480i, PAL: 576p / 576i) is to be output such as when [Composite / S Video] or [AV MULTI / SCART] is selected in step 4.
8.
Check your settings.
Confirm that the image displayed is at the correct resolution for the TV. You can go back to a previous screen and revise the settings by pressing the button.
9.
Save your settings.
The video output settings are saved on the PS3™ system. You can continue on to set audio output settings. For details on audio output, see (Settings) > (Sound Settings) > [Audio Output Settings] in this guide.



Source: http://manuals.playstation.net/document/en/ps3/current/settings/videooutput.html

There's only one way to get that TV to switch from 480i (which is an SD or Standard Definition signal) - that's to provide it with an ED or HD resolution signal (a 480P signal is often called ED or Enhanced Definition while 720P, 1080i and 1080P signals are called HD or High Definition).



The old standard yellow composite video cable.
.
You will not get ED or HD signals through the old composite RCA phono jacks (usually yellow in color), either. You'll need to use an RGB (red, green and blue) component video cable, HDMI cable, DVI, or other type supported by both your TV and the video source (CATV box, Blu Ray disc player, Satellite converter, etc.). More on this, later.

RGB cable.


An HDMI cable - this provides Digital audio signals, too.
.

A DVI cable.
.
First, you'll need a source capable of sending ED or HD signals. This can be a progressive scan DVD, Blu Ray player, HD Cable or Satellite converter, or a simple TV antenna. Not all DVD players are capable of the 480P progressive scan output - it must be labeled as such. The DVD movies are not labeled progressive scan as they all will play back at 480P if played in a DVD player capable of progressive scan, otherwise they play at 480i. A stand alone Blu Ray player or one in the Sony PlayStation 3, the older HD-DVD in the Xbox360, (it is important to note that the Nintendo Wii can output either 480i or 480P signals only when connected with their special component video cable), "set top boxes provided when you choose HD service from your local cable provider or satellite TV provider are the main sources for signals better than 480i. As mentioned above, the old standard yellow video jack is not capable of supporting signals better than 480i. You must use the HD jacks and cables between to get these signals into your TV.

The Wii 480P cable assembly - includes stereo audio, too.


Lastly, if your TV has an ATSC tuner (it is not uncommon for it to have an NTSC tuner and CATV tuners as well), you can input a UHF antenna directly into the the antenna terminals on the TV. Broadcasters in most areas have been moved into UHF bands - but some areas have one or two that operate in the VHF bands still. Check antenna web for information and help selecting antennas and broadcasters in your area. The nice thing about the antenna method is that no other cables, converter boxes, etc are needed to enjoy HD signals - plus - they're free!

Just remember you need a source capable of ED or HD signals and a way to get those signals to your TV. The yellow composite cable is from days ago and only passes 480i signals.

I hope this helps and good luck! Please take a moment to rate my reply - thanks!

Hello

Your TV will display all High Definition signals as 1080i True HDTV™ and all standard definition signals will be displayed as 480p.

Component Inputs 1-2
YPbPr(480i/480p/1080i)
These inputs can be used for the connection of A/V equipment with component video outputs, such as a DVD player or external HDTV receiver. Please see Appendix B for signal compatibility.
Input DTV (480i/480p/1080i)
This input is used to connect an external DTV receiver, and can be configured for YPrPb and RGB plus H&V signal types.

As a special feature, you have the ability to adjust the red and blue light beams in reference to the fixed green light beam. This process is called convergence. There are two separate memories for convergence. One, for SD 480i/480p signals; the other for HD 1080i signals. SD convergence should be adjusted while watching an SD source and HD convergence should be adjusted while watching an HD source.

Wide Expand: Enlarges the picture, cropping some of the image on both sides. This Expand format is useful to remove or reduce black side bars on HD broadcasts of 4:3 images with black bars. Available for analog 1080i, digital SD 16:9 and digital HD signals.

InputDTV
This input is compatible with most standard DTV and satellite receivers with component video (YPbPr) outputs. Compatible DTV signals are SDTV 480i/480p, and HDTV 1080i. All other DTV signals, such as 720p, need to be converted by the DTV receiver to one of the compatible signal types. Please check the DTV receiver specifications before connecting.
This input is compatible with some DTV receivers using RGB with "separate H and V sync". Compatible DTV signals are SDTV 480i, 480p, and HDTV 1080i. All other DTV signals, such as 720p, need to be converted by the DTV receiver to one of the compatible signal types. Industry standards for DTV RGB signals (systems, synchronization, timing, and signal strengths) are not currently established. These inputs will not be compatible with all DTV receivers that offer RGB, HV outputs. RGB, HV signals with less than 5 cables are not compatible.
If your DTV receiver offers both DTV component video signals and DTV RGB, HV signals, we suggest you use the DTV component video signals. Check the DTV receiver specifications before connecting.
Ok.

because your dvd player only put out a 480i signal

Adjust the system's video output settings. Select the best output settings for the TV in use.

1. Check the resolution supported by your TV.
Resolution (video mode) varies depending on the TV type. For details, refer to the instructions supplied with the TV.

2. Select (Display Settings) under (Settings) in the home menu.

3. Select [Video Output Settings].

4. Select the connector type on your TV.
Resolution (video mode) varies depending on the type of connector used.

Input connector on the TV Supported video modes (NTSC region) *1 Supported video modes (PAL region) *1
HDMI 1080p / 1080i / 720p / 480p 1080p / 1080i / 720p / 576p
Component / D-Terminal *2 1080p / 1080i / 720p / 480p / 480i 1080p / 1080i / 720p / 576p / 576i
Composite / S Video *3 480i 576i
AV MULTI / SCART *4 480p / 480i 576p / 576i
*1 The video mode options vary depending on the region where the PS3™ system was purchased. In North America, Asia and other NTSC regions, 480i video mode is displayed as [Standard (NTSC)]. In Europe and other PAL regions, 576i video mode is displayed as [Standard (PAL)]. For details, refer to the instructions supplied with the product.

*2 D-terminal is a connector type used mainly in Japan. The resolutions supported by D1-D5 are as follows:
D5: 1080p / 720p / 1080i / 480p / 480i
D4: 1080i / 720p / 480p / 480i
D3: 1080i / 480p / 480i
D2: 480p / 480i
D1: 480i

*3 Composite is the connector used to connect the AV cable that is supplied with the PS3™ system. S VIDEO is a format mainly used in Japan.

*4 AV MULTI is a format mainly used in Japan. SCART is a format mainly used in Europe. If [AV MULTI / SCART] is selected, the screen allowing you to select the type of output signal will be displayed.


5. Change video output settings.
Change the resolution for the video output. Depending on the connector type selected in step 4, this screen may not be displayed.

6. Set the resolution.
Select all resolutions supported by the TV in use. Video will automatically be output at the highest resolution possible for the content you are playing from among the selected resolutions.*
* The video resolution is selected in order of priority as follows: 1080p > 1080i > 720p > 480p/576p > Standard (NTSC:480i/PAL:576i).
If [Composite / S Video] is selected in step 4, the screen for selecting resolutions will not be displayed.
If [HDMI] is selected, you can also select to automatically adjust the resolution (the HDMI device must be turned on). In this case, the screen for selecting resolutions will not be displayed.

7. Set the TV type.
Select the type of TV in use. Set when only SD resolution (NTSC:480p / 480i, PAL: 576p / 576i) is to be output such as when [Composite / S Video] or [AV MULTI / SCART] is selected in step 4.

8. Check your settings.
Confirm that the image displayed is at the correct resolution for the TV. You can go back to a previous screen and revise the settings by pressing the button.

9. Save your settings.
The video output settings are saved on the PS3™ system. You can continue on to set audio output settings. For details on audio output, see (Settings) > (Sound Settings) > [Audio Output Settings] in this guide.

Hi

Try This links and follow the instructions! CLICK HERE

Thanks!!

try switching the resolution settings on the DVD player and/or the TV. I have had a similar problem and there was a manual switch i missed.