How do I get the manual for SONY BD RMT-B126A

It doesn't look like this remote was intended to control more than the TV On/Off , Input and Volume. The remote code list for the Sony RMT-B107A will be included in the manual for the Blu-ray player that the remote came with. According to https://www.remotecontrols.com/product/RMT-B107A.html , this remote was included with the Sony BDP-BX37, among others. The support page for this player is https://www.sony.com/electronics/support/product/bdp-bx37/manuals . The current link to the manual is https://www.sony.com/electronics/support/res/manuals/4169/41691391M.pdf . See page 36 for the TV code list. See pages 9-10 for the button functions for the remote.

Vizio is not listed in the code list. However, Vizio uses a number of OEMs to build their TVs. Those OEMs may use the same remote control hardware as other brands of TVs. Since the copyright date for this manual is 2010, the remote is unlikely to be fully compatible with TVs built after 2009. (Most universal remotes are trained with codes for devices released 6 months or more before the remote is programmed.)

I wish that I had better news for you. Please add a comment with the model of your Blu-ray player if you want me to find that specific manual.

Cindy Wells

Set-up (Programming) procedure is too much to type in here, and is not practical and it will differ brand-to-brand remote controls. If you wish to get more; check the sites linked here. It has set-up code list & set-up procedure to many popular brand remote controls. One among it has general set-up codes to check with TVs and other devices are given, in the order of the 'device's brand name list' in alphabetical order. Pull up older posts. Search the sites by type in the brand name to your device in its search box at the top right part of the display window. It will help you to find the document easily.
http://remotesearch.blogspot.com/
http://electronicshelponline.blogspot.com/
http://electrohelponline.blogspot.com/

Sorry can't help. Would need to know TV manufacturer, not remote manufacturer.

If you wish to get more details; check the sites linked here. It has set-up code list & set-up procedure to many popular brand remote controls. Common codes to check devices with different brand TVs are given, in the order of the device's brand name list in alphabetical order. Pull up older posts. Surf the site with patience.
http://remotesearch.blogspot.com/
http://electrohelponline.blogspot.com/

Only by programming it with the proper code. Please consult your documentation for programming codes.

03829,03817,03822. Try these codes. For more information http://electrohelponline.blogspot.com/ Setup procedure, and setup code list to many popular remote controls are given. Pull up older posts.

put fresh batteries in and try again. If still not working, read the manual (found in Sony site) to restore factory settings.

Code 04 worked for my 42 Visio LCD, using the RMT-119A remote

Hello
Setup codes for Sylvania Tv with Sony RM VZ320 remote control are:
00054/00171/01271/ 01314/01394/01864/01886
OK.