Kdl-32v4000 sound The sound has gone completely

Hi go into E/BAY & Type in search Logic Board CPWBNRUNTK 4024TP ZA FOR SONY KDL-32V4000 KDL-32S4000 32" LCD TV ....,.COST aprox £3.40 plus delivery £4.95... Cheers

Fault with the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Sounds like T'Con board fault. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

The T'Con boards to 32" & 37" are not compactable. Gopakumar Gopalan Google

Malfunction of 5V line
(Voltage Supply to FE, etc) please check 5v power supply other wise change
BG1TW MOUNT (KDL-32V4000)
main system board

I am guessing the screw size is M6/16mm , based on Sony official page for your TV:
http://www.sony.co.uk/product/tv-80-32-lcd/kdl-32v4000/technical-specifications#tab

Lowes or Home Depot or Ace Hardware (I prefer the latter for more knowledgeable employees). If no hardware stores nearby, try Sears or Best Buy (you may need to ask more than one person, don't give up too easily). If visiting a hardware store, you may have to look in the 'roofing' screw bins or nearby to find the right size.

You might also look for TV mounting kits that have that size screw, but you'd probably pay much more than finding the screws alone at a hardware store.

Two blinks - B+ over current protection (OCP), unit goes to the standby mode then displays the 2 blink fault. Could be a short in the power supply of any of the circuits.

hit the display button on your remote

you need to change the aspect ratio from 4.3 to 16.9 God Bless

Check DAV amp menu and select DTS surround or any other digital sound option.