TV Model LN32C540F2D, how do I stop the start up sound? [tone]

Check and replace the CCFL lamp.

Back-light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/

These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices. Viewing it in "Mosaic" or "Magazine" will make surf easy.
http://electronicshelponline.blogspot.com/
Blinking codes details to many popular brand TVs are given. Surf the site with patience.

Is it possible to post a picture of the screen with the colorful lines? You are looking at either a tcon and an lvds cable or a bad display. May be able to narrow it down if I can see a pic.

Capacitor most likely has failed on the power supply PC board, If you open the tv and look at the board you may find a capacitor that looks something like the one pictured below. You need soldering skills to replace the part or parts that look swolen on top.

First is to check all inputs tuner and rear---white spots suggest whatever is doing the digital processing in the set is the cause----main board most likely with power supply faintly possible.

Send your email address to me, and get the repair manual to your set by return mail. It has all details you wish to get.

I see so many here with no sound/nopicture issues:

ISSUES:

1. IF sound main fuse/s are good.
2. If no power or standby check main fuse, standby power supply and any signsof damage you can see---burnt parts etc.
3. almost all these sets the troubleshooting involves checking voltages on the main power board to narrow down theproblem.
4. Be safe and if you do not know what you are doing don't open the set.

Answers to issues:

1. RE:fuses---if a blown fuse is found get a good replacement(not the genericones like Radio Shack). Many fuses are special even aside from amperage--Don'tput a higher rated amperage fuse in the set for any reason.

2. RE: power supply in set: if total dead aside from main fuse the set uses astandby power supply that runs 7/24 and a main supply (some are combined andsome not.

Here aside from checking fuses you want to examine all the filter caps on thepower/standby to see if any are puffed up or buldged up in some fashion--Iattach a photo of a good one---top should be silver metal and PERFECTLY flatand have no brown material coming out on top or bottom.

What happens in the standby area is they use caps with too low a voltage rating(saves money) which causes them to fail in a year or two---the standby runs7/24 and the heat dries out the caps and they fail.

3. Trouble shooting consists of the above and then at some point you have tobuy and try a board to see if it fixes it or not.

4. Safety first--no TV set is worth getting injured or even killed over.

The tv have a problems in it power supply board,that the board where the tv power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish tv power supply board for the replacement.Power supply board have some bad high voltages transformers.That why ur tv even getting a high pitched sound even the tv it is off and tv it is not even on,and tv it is on standby mode only.

make sure the copy button is on.
to turn of the beeps
then press function - 1- start- 9-0-0-0-start -9-start-1-start stop