The picture from my fire stick is too large for the screen. The picture from my regular tv, cable and dvd are perfect. I need to know how to adjust the size of the picture.

Generically, using my LCD TV as an example, it looks as if your TV's menu needs to be adjusted while in the "fire-stick" mode.
By "Fire Stick" I'm guessing this is another term for USB, Flash Drive or 'Memory Stick' ?
If so, this input item is called 'MEDIA' on my TV.
Then once in this input mode, there should be settings for screen aspect ratio and / or size.
It may be that TV is 16:9 widescreen ratio, and media mode isset up for another ratio, eg PAL or Letterbox, or vice versa.

Check the cable and connections between the TV and your cable line. Make sure the contacts are clean, no bent pins, etc. Try replacing the cable if possible.

Look for an option in your TV settings that allows you to adjust the screen size, once found, adjust to your actual TV screen and it should in theory fit perfectly.

On my LG (32LD320H)

The control is under

• Menu > Picture
• Aspect Ratio: (16:9 for most HD content. Use 'Just Scan' or 'Set by Program' for auto sizing.)
• You may need to adjust your cable box or DVD for HD and matching display parameters.

We recommend you press the [FORMAT] button on the TV remote to manipulate the TV's aspect control. If the screen still does not fit then your cable or satellite box is in a stretch mode.

try to adjust the pic size on the cable box or DVD player that is generating the picture.

U tries used the DVD player remote to fix this problems,could be the DVD movie?Have the same problems,with the regular tv incomming broadcasting signal?Yes,than the tv Tuner signal board is the problems and the causes it dying and shorted.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish tv Tuner signal board for the replacement.

It appears that on this television you can only adjust the picture size when you are using the twin picture feature. You must adjust the picture size with your other remote control. Since I do not know whether you are connected to a cable box or a satellite tv box or a blu ray player or a DVD player I cannot be very specific. On your other remote control you should had an hd zoom button, aspect, format, ratio, #, or etc. Those buttons change the picture size. The other factor determining picture size is the resolution the equipment connected to your tv is set to. This tv supports 1080i but you should also try setting the connected equipment to 720p or 480p or 480i. Also the connected equipment may be connected to your tv in two places so make sure you are on the correct selection using the tv video button on the Sony remote.

Hi

maybe the system settings is not set in default mode

Thanks!

If the television is connected to a cable box such as Time Warner's HD box, the picture mode can be changed by pressing the '#' on the cable box's remote keypad (where the channel numbers are). This cycles the picture between zoom, normal, and stretch which could be cause of your problem.