The TV is blocking certain channels and I don't know the code to unblock it.

call vizio they will help you with that.

Aiwa television comes with the option of blocking certain channels from viewing, allowing you to control which channels people using the television can view. However, if you forget the code that you entered to block the channels, you might find yourself unable to watch those channels. Fortunately, there are a couple of buttons on the television and the remote that you can press to reset the PIN and customer ID numbers, which unblocks the channels.

Turn the television on.

Press the "Volume Down" button on the front of the TV and press the "7" button on the remote at the same time.

Enter in a new PIN code and new customer ID.

Most TVs have a parental control lock that can be set to prevent children from watching specific television shows. In order to activate or deactivate the controls, you need to know the four digit security code or parental lock control password. If you forget the number you chose or if the lock gets set accidentally, it is still possible to unlock the TV.
Instructions

Turn on the TV and grab the remote. In most cases, you will need the original remote to unlock the TV if you aren't sure of the unlock code. If you don't have the original remote, you will need to purchase one.

Look at the screen. If you see a blank screen with a red key on the bottom of the screen, press 'Function' and 'Mute' at the same time. This should unlock the channel. This is an option for people who want the TV to stay locked but, want to be able to bypass the lock to watch a certain show or channel. All other channels will remain locked and the TV will fully lock when it is turned off.

Unlock all of the channels on the TV by entering the factory reset code. There are three main reset codes that TV manufacturers set. These are 0711, 6688 and 3308. Try each one until you find the one that works. This will reset the TV to original factory settings. When you do this, you will loose any information that you have stored in the TV, such as favorite channels, automatic timers and the clock. You will have to go through the full initial set up.

Call the technical support service number in your owner's manual if none of those codes work. A technician can help you troubleshoot the television because the problem may not be the locking control. When you call, make sure that you have the model number and serial number of the TV.

Take your television to a TV repair shop. In some cases, a professional who access to wiring diagrams for your television set may have to rewire certain components in order for the television to unlock. This is usually the case when the TV locks by itself while it is on.

Go to your tv menu, and find the auto tune section.Try running it again. otherwise you can unblock just the channels you want. It might have blocked channels that didn't seem to carry a signal.

This is what I found in the instruction manual on this and I posted it here for you. Try using 3355 for the code and everything else listed here. If that doesn't work, try the very last tip which tells you how to do a factory reset and repeat the first step using the 3355 as the code.

Here's the instructions from manual:

Parental Control
Parental Control allows you to block certain channels or programs so children cannot view
programs that are not age appropriate.
To enter the Parental Control menu, you need an
access code. The first time you enter, use access
code 3355. See "Setting an Access Code" on
page 33 for information on creating a new access
code.
You can set the following options to block
content:
• Channel Lock — Blocks selected channels
• Movie Rating — Blocks movies based on their rating (G, PG, PG-13, R, NC-17, and X)
• TV Ratings — Blocks TV shows based on their rating
• Block Options — Turns on or off all your parental control settings
NOTE: You can use Clear All to unblock the channels and programs that you have set.
NOTE: If the Block Control in the Parental Control menu is enabled, all the sub screens in POP (POP1,
POP3 and POP12) mode will be blank



Setting an Access Code m
After you enter the Parental Control menu for the first time, you can set your own four-digit access
code. If for any reason you lose or forget your access code, you can use the default code.
1 In the Parental Control menu, select Change Code.
2 Using the number pad on the remote control, enter a new access code.
3 Select Exit.




Reset the original factory defaults. Press Menu on the remote
control, select Setup, and then select Factory Reset

This television uses a feature called a V-Chip which allows parental control and consequently blocks channels of your choice. This set is approximately 7 years old and the owners manual is no longer available on line. You can over ride any blocked channel by entering the menu, select parental controls and enter the "secret" code. How one channel got blocked is a mystery. I suspect someone was exploring it's features when they accidentally blocked a channel. Normally the system control works flawlessly and if you have no other symptoms you need to reset that channel. That info is in the owners manual that came with your set.

Try this:
On Remote Press Channel Up And Volume Down At The Same Time For 5 Seconds. Then Enter 0000 As Your New Password.

Look for a reset to default feature in the settings of the TV. That should release the unblock feature and should pick up all channels during the scan.

The Digital Channels are Blocked and Some of the Annalog Channels are Blocked that you can't access some channels and how do you unblock the channels by getting rid of the Code for Parental control?How Do you get rid of the Parental Code to acess all Channels .