Sony Bravia does not see my digital channels

The TV enters standby mode when there is no signal for 30 seconds. https://docs.sony.com/release/KDL46V3000.pdf
I searched standby using Ctrl+F and found this information. It seems you should be able to bring it out of standby using the power button on the remote. You want to make sure there is an input connected and if it is connected to a PC that the PC isn't telling the TV to go into standby.
Try pressing the input button and changing inputs once you press the power button and the Standby is flashing.
If this doesn't work you may need to contact Sony Support.
1-800-222-SONY(7669)

If you've tried different antennas did you attempt to re-tune/re-scan for additional channels after switching? For digital channels to be detected they must be scanned for, so consult your manual on how to perform an automatic scan of the digital channels available in your area.

hi,
IT normally happens after factory reset is done. You need to reprogram the channels. Try the auto program (AUTO TUNING) Process.

1. On your remote commander " Press HOME or MENU button"
2. Scroll down to " SETTINGS or SET-UP"
3. Then to "CHANNEL SET-UP"
   
4. Select " AUTO PROGRAM " To Auto program your LCD TV and it's done..
   

Hi there,
If you haven't done so already, check that the cable between your tv and digital cable box(probably HDMI) is secure at both ends. If it is, try a different cable and/or different port on your tv if you have more than one. If the issue is still there after you've tried these options it's most likely an issue with either the digital box or tv. I would contact manufacturer at this stage for advise and possible replacement of tv or box if they are under warranty.
Hope this helps.

Usually this happens to my set when I am in HD cable channel mode after being on a non-digital ANALOG channel.

I basically reset the TV by changing to a DIGITAL cable channel -- stay on that channel for ten-twenty seconds -- then I switch back DIRECTLY to a HD channel (key in channel number directly on remote).

TV works fine -- seems to be a glitch when the TV changes modes from Analog to HD

If you are connecting the cable directly to the TV with no cable box, you'll select Home on the remote control. This will put the menu on screen. Scroll down until you find the Channel Settings option. Set the Cable category to On, Select Auto Program to automatically scan for all analog and digital channels. You can then customize which channels you want to remove when scanning channels.

I have the same problem, If anyone could help it would be appreciated.... I have the coaxial cable plugged in which on another TV had all 85 channels, and I changed the TV from analog to digital and reprogrammed it but I still only get like 4 or 5 local channels?

this can be a weak signal check the connections on cables. also in hot weather you can get a build up of static electricity and it will need to be discharged, turn off tv at mains and cross the connector and the cables if you have a buster or other box connected to them turn off and do the same to them. use something metal but make sure there is no power to them.

I don't know where you're located but you may want to double check with Time Warner on the availibilty of an HD box. I have TWC with an HD tier package and have an HDMI out on the box that runs directly into HDMI on this TV. Hope that helps!

I had the same problem re digital cable. Turn tv off after connecting to cable TV cables, then back on - use your cable tv remote control and choose a channel. This might work for you as it did for me.