My Sylvania LC320SLX has no sound, can I reset it? picture is fine. sound just stopped all of the sudden.

Of course not. It is an old and simple set from 2009 and perfect for a bedroom

Sylvania LC320SLX LCD TV (LC320SLX)

http://www.hdtvsolutions.com > Sylvania-LC320SLX

A smart and trusted choice for everyone. The LC320SLX offers high-level video and audio entertainment in a stylish package. View high-definition programs in ...
Component (HDTV): 3 RCAs
Formats: 480i, 480p, 720p, 1080i
Screen Size: 32" Diagonal
HDMI: HDMI (3 sets)

0510 0447 0810. Try these codes. If you wish to get more; check the site linked here. It has set-up code list & set-up procedure to many popular brand remote controls. See it in "Mosaic" view. It will make surf easier.
http://electrohelponline.blogspot.com/

There is short circuited component/s at its main power supply regulator board. Check and replace them. It is best to replace the circuit board as card bassis, rather than trying to repair it.

The volume down button/switch on the set is defective

Hi there, please try to reset your display by following my guide -

http://www.fixya.com/support/r6784945-playstation_3_no_display

Thank you for using FixYa

hi! i have a cople of codes here for your tv, just try them, 1004, 1007, 1018, 1027, 1047, 1056, 1057, 1059, 1060, 1061, 1103, 1124, 1145, 1150, 1153, 1279, 1296, 1387, 1464, 1483,1046, 1465, 1150, 2092, 1464, 2408, 1465, 2260, 1027, 2064, 3105, 1124, 2078, 3088, 1296, 2213, 3147, 1145, 3095, hope this helps!!! goodluck!!!!

The problem may be with the Direct TV box, unless you can find another HDMI source to confirm that it is not the TV.

hi! i have here a couple of codes for your tv, just try them, 1046, 1465. hope this helps! goodluck!!!

Download manual and read all about it here: http://retrevo.com/support/Sylvania-LC-320SLX-TVs-manual/id/23336ci476/t/2/

i need to program this sylvania LC320SLX model to my control remote