Bravia kdl40v3000 hd chanels have only sound but not picture. What could be the reason?

SOURCE: Sony BRAVIA KDL46S2010 Sound and Pix not in sync - in HDTV channels only

This is a software issue with both the TV manufacture and the cable box provider. This will only be fixed when the cable company and TV manufacture sit down and work out their problem. Some cable company has taken the first step by updating cable boxes with different software.

Best regards
CircuitCity

SOURCE: Sony BRAVIA KDL-40S2000 40 in changing from HD to digital channels

40X2000, both PS3 and DVD player are using a HDMI input and both flicker and loose signal fully, have to turn TV of then back on to get signal back. Sony say they have never heard this problem and replaced board. NOTHING fixed, still same problem.

SOURCE: color on the Sony Bravia

Check the cables. It sounds like the cable for blue is loose.

SOURCE: Sony 52" Bravia LCD will drop picture and sound for 1-2 seconds

the only thing that i can think of is that the cables and connections are bad but if that is not the case it may be the internal components of the tv. my guess is that the tv was dropped or jumbled around while transported and what happened was internal components were broken or just mixed up so go to the retailer and get a refund or a new tv. hope this helps

SOURCE: Bravia & Sky+HD, aspect problem

There is nothing wrong with you Sony Bravia TV and it suppport all HD and SD formats.

Are you viewing the HD version of the channel when it is showing a standard defination show. e.g SKY1 HD instead of SKY1.

This means that regular standard defination shows are in a 4:3 ratio and does not fill the whole screen. In order to view these type of shows you will need to tune to regular channel instead of the HD version.

You can check if a show is brocast in HD by going into the tv guide and checking for the HD symbol in the programme symposis.

Example