My att remote control for my uverse did not come with a manuel

Hruh, Check the attached links manual,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
http://download.medion.com/downloads/anleitungen/md4689ml.pdf
http://codesforuniversalremotes.com/remote-control-codes-for-lg-tvs
3 Digit Universal Remote Codes For TV Codes For Universal Remotes
https://www.att.com/support_media/images/pdf/uverse/set-up-code-list.pdf

The RC-866M is the remote. What you need to do is add the codes for your Onkyo receiver into the ATT remote. There are 4 or 5 different Uverse remotes, but most can be reprogrammed by pressing the 'Menu' and 'OK' button together. First add your Onkyo codes to the ATT remote as an 'aux' device. After that is working, you can control the power and volume by adding the 'aux' device (Onkyo) to the power and volume buttons on the uverse remote.

These are all the different Onkyo Receiver codes:
Onkyo: 5002, 5018, 5073, 5074, 5075, 5076, 5077, 5078, 5079, 5080, 5081, 5082, 5084, 5085, 5086, 5087, 5130, 5131, 5140

This is how to reprogram the S10 style of Uverse remote:

http://www.att.com/support_media/images/pdf/uverse/standard_black_remote_control_uverse.pdf

If you wish to get more details, check the links given below. Setup code list and setup proceedings to many popular brand remote controls are given. Pull up older posts there. You can also make a search by type in the brand name of your device into the search box; can be located at the top right of the display window. More than Nine and half Lakh viewers cannot be wrong.
http://electronicshelponline.blogspot.com/
http://electrohelponline.blogspot.com/

http://electronicshelponline.blogspot.com/
http://electrohelponline.blogspot.com/

From ATT website: UVERSE remote codes:
http://www.att.com/support_media/images/pdf/uverse/set-up-code-list.pdf

I see for VIZIO codes listed as 1429, 1433, 1439, 1489

ATT Uverse remote doesn't work well with Emerson TVs.
Most will turn off with the correct code but NOT ON.
Find the code that will turn OFF the Emerson TV.(volume should work too)
When you want to want to turn ON your Emerson TV Try This (Believe it or not)
Wave ATT Remote slowly and press ON in mid wave. The ATT remote on frequency must be slightly off. This works every time for me now that I know the secret. Remember Doppler Effect from High School Physics.

Click Here for the list of Manufacturer's Code for AT&T Uverse

i do not think it would work with your tv. there has been problems when tech installed uverse on dozens of tv. you can try to purchase an universal remote and see if that works. it is just like a jvc vcr/dvd player/recorder which will not work with any tv but jvc. you can also call att tech to help

first try new batteries and be sure you have pressed the AT&T mode button at the top left of the remote - if you still have issues then on the sharp tv menu - turn off any energy saver mode, Optical Picture Control, taking the picture mode from dynamic or vivid to standard, and if that doesn't work - try changing the backlight settings if your tv has one.

Hi,
Maybe too late for you but ATT just gave me a code that works with my Vizio plasma. Code is 1343. Even the mute works correctly. They gave me some others to try but I didn't need them. Other codes were 1018, 0030 and 0056.