When I auto scan channels it want find none. what do I do??

If your Viore TV is unable to scan digital channels after a power outage, there are a few things you can try to fix the issue:

1. Check the TV's antenna connection: Make sure that the antenna is securely connected to the TV and that there is no damage to the cable.
2. Rescan for channels: Go to the TV's menu and select "Auto Tuning" or "Channel Scan" to rescan for channels. Make sure to select the option for digital channels only.
3. Check for software updates: Make sure that your TV has the latest software updates. Go to the TV's menu and check for any available updates.
4. Perform a factory reset: A factory reset will restore your TV to its original settings. This can sometimes fix issues with channel scanning. Consult the manufacturer's manual for instruction.
5. Check your TV's location: Make sure that your TV is in a location where it can receive a good signal. Try moving the TV or the antenna to a different location.

If none of these steps work, it's possible that the TV's tuner may be malfunctioning and may need to be repaired or replaced. Contact the manufacturer's customer service or a professional technician for further assistance.
Regenerate response

Refer its user manual for details.
Electro help

In the TV se-up menu look for a place to set the 'Default antenna input' to cable/coaxial.

The auto scan feature scans the various channel frequencies looking for a signal. Weak signals may be picked up on one scan and missed on the next. Check your antenna or add a antenna power booster and try again.

Hello
To tune your Panasonic Plasma to on air TV channels do the following:

Connect the antenna connection to its antenna in at the back panel.

Automatically searches and adds available channels to the memory.

Select "ANT in"

Select Cable or Antenna Select "Auto"
Select a scanning mode

Auto channel setup
Select "Auto program"
Select "ANT in"
Select "Auto"
Select scanning mode (ALL channels/Analog only/Digital only

Start scanning the channels

Available channels (analog/digital) are automatically set.

All channels: Scans digital and analog channels

Analog only: Scans Analog channels only
Digital only: Scans Digital channels only
Confirm registered channels

If OK is not pressed after selecting "Apply", the channels will not be saved.

The channel will be saved when no operation is performed for 60 seconds and

the "Manual program" menu will also exit automatically.
If you perform scanning more than twice, previously saved channels are erased.

About broadcasting systems

Analog (NTSC): Conventional broadcasting

Digital (ATSC): New programming that allows you to view more channels
featuring high-quality video and sound
[Use "UP ' DOWN ' RIGHT ' LEFT] AND 'OK"] keys to selcet and proceed.

If it won't let you re-scan to find channels and if it used to have channels but now has none, the main board must be replaced.

I ran the Auto Scan. Before the scan reached 91%, I pressed the Menu button on my remote and all of the channels that it found locked in.

you may be able to do a manual scan ion each channel which is similar to auto scan.
Its normal for auto scan to select random channels when scanning.

Try unplugging it for 2 minutes then se what happens. Make sure that none of the buttons on the TV or remote contol are stuck (especialy if remote is near TV).