Samsung lcdtv la22a450c1

If you wish to get some details; check the site linked here. Pull up older posts.,,,
http://electro-medical.blogspot.com/

Fault to the main power supply regulator section. Either it will be a separate board, or the part of main 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://electro-medical.blogspot.com/
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.

I don't have service mode specifications but I do have a Samsung and looked around for how to get it in service mode some time ago because the HDMI cables somehow disconnected themselves a lot. Thought it was an electronic problem but it turned out to be a parenting problem instead SO I have never used this information and can not vouch for it. I cut and paste it from a note I copied from a forum entry to use at your discretion:
First post:
To enter "Service Mode" Press the remote - control keys in this sequence :
From Standby Info-Menu-Mute-Power On
- The buttons are active in the service mode.
Remote - Control Key : Power, Arrow Up, Arrow Down, Arrow Left, Arrow Right, Menu, Enter, Number Key(0~9)
Careful though there are things you shouldn't touch in this menu.

avforums.com/forums/lcd-led-lc­d-tvs/601553-samsung-service-m­enu-research.html

Another post:
Method 1
Put TV on standby and then push in series these buttons on the remote: 'info, menu, mute, power' the TV will then turn itself on and display a menu.
Method 2
Turn the power off. On the remote, press Mute followed by 1, 8, 2, Power in sequence.
Method 3
With the TV in standby, press the {DISPLAY} {P.STD} {MUTE} {POWER} on the remote.
Method 4
With the TV in standby, press the {SLEEP} {P.STD} {MUTE} {POWER} on the remote.
Method 5
With the TV in standby, press the {DISPLAY} {MENU} {MUTE} {POWER} on the remote.
Method 6
With the TV in standby. On the remote, press Mute followed by 1, 1, 9, Enter in sequence.
Samsung LCD Monitor Service Menu Instructions

End quote.
Good luck. Just a basic suggestion you probably don't need: keep track of any changes made by writing them down so you can put it all back if you have to.

Contact the authorized service centre for Samsung; to buy a genuine piece. http://electronicshelponline.blogspot.com/

T'Con board should be suspected. Not to suspect; it should be. Contact any service technician. Check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Going to be hard to trace since no schematics are usually available except to authorized service centers.

The 5 volts should come from the standby power supply which is usually part of the main power board.

If you feel lucky you may want to buy and swap the board out.

Also with set off check for a short to ground on that line.

Hi,

Silence the tones your keypad makes when you press a key.

To enter Silent Mode:

In standby mode, press and hold . # button,“Entering Silent Mode” briefly appears in the display and your phone returns to standby mode

To exit Silent Mode:

While in Silent mode and standby mode, press and hold # button “Exit Silent Mode” briefly appears in the display and your phone returns to standby mode.


Adjust the Ringer:

1. In standby mode, press the volume key on the right side of the phone up or down. Options are:

Ringer Off
Vibrate
Low
Low/Medium
Medium
Medium/High
High
Vibrate/High

2. When you are satisfied with the setting, press OK.Your phone returns to standby mode.

Thank You

Try this...remove the card and battery...press all the buttons...leave it alone for 20 minutes...insert the card and then the battery...turn it on.

To Exit Silent Mode:

In standby mode, press and hold the # (pound). Exit Silent Mode briefly displays and your phone returns to standby mode.