20 Most Recent Samsung LN46A650 46 in. LCD HDTV - Page 5 Questions & Answers

TRY PRYING TWO OPPOSED CONERS OF THE SCREEN AT THE SAME TIME IF IMAGE CHANGES OR COMES BACK NORMAL YOU HAVE A DEFECTIVE PANEL .

there is a light sensor that is for the backlight thatg if you refer to your manual you can find out how to turn it off

It is the Main A/V board that is faulty, not the power supply. The rainbow screen that you are seeing and the searching for signal message before it shuts off confirms this. It is the large board at the center of the tv. If you can get me the part number off it, I can find you the replacement. It will be either printed on the board itself or on a small label.

Sai.

Yes,T-Con board is dead.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish T-Con board for the replacement.

It is an indication of faulty electrolytic capacitor on the power supply section.
Leaky capacitor affect your power supply that's why it is hard to power up.
If you haven't knowledge in electronics then don't attemp to repair it because there some component on the power supply that can cause you an electric shock even it is unplugged.
I've advice you to look for a qualified technician to isolate the problem.
It is fixable and no need to replaced the entire power supply.
The symptom will get worst if not replaced the leaky capacitor.

Pls rate my help.

Thanks for using fixya...

Ummm, there seems to be alot of people with this problem.... Try contacted Samsung? Warranty? Tech Support usually is very helpful.....

Your problem may be that you need to select the "AV" input on the HDTV. Samsung HDTVs of late combine the composite video with the green input component video. To use the yellow composite video in the green input port you have to select the proper AV input on the TV which tells the TV to go composite video (yellow) instead of component video (green). Try this, it may work.

Try unplugging it for half an hour first.
Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com

In most cases it is the capacitors in he power supply section that have gone out.

Common symtoms are
-shuts down
-takes a long time to come on
-relay clicks
-dead set

You can get capacitors online or you can get a complete kit with instructions and support from www.TvRepairKits.com . Its a failry easy DIY fix.

I had a similar problem with my Phillips 42 in. LCD HD TV.

Here's the problem. The Power Supply Board. I opened my TV up(warranty was up of course) and found several bad capacitors. Phillips and several other companies were sold capacitors that although were highly rated failed within 5 years because of a lack of preservatives. All sorts of electronic equipment is now being effected due to these defective capacitors.
Solutions?
1. Take it in and have it fixed
2. Open it up, check the board for faulty capacitors(bulged or leaking) Buy a new Power supply board and install it.
3. Remove PSB, remove faulty capacitors and replace with compatible new ones.

Hope this helps

Check-out this forum/link - it solved my LN46A650 dark screen problem:

http://forums.cnet.com/7723-13973_102-391250.html

I had the power board capacitors on my Samsung 46LNA650 checked, and the out-of spec/leaking ones (13 in all) replaced. The horizontal lines disappeared; but, the left side of the panel was dark for about 20 minutes (until warmed-up). I then found this forum/link that solved the problem! This simple fix was probably all that was ever needed - IT WORKS!!!!!!

http://forums.cnet.com/7723-13973_102-391250.html

My Samsung now has a perfect picture again.

It may have dying power supply due to bad caps.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on: Please see my basic troubleshooting guide here: http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums http://en.wikipedia.org/wiki/Capacitor_plague Parts: www.shopjimmy.com Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps. Please post back what you find.

Inside the tv there are 2 fans for cooling the electronics power boards. One of them has failed.
Open the back of the tv , locate and replace it.

Contact Samsung for possible one-time courtesy repair.

you have a 1 year frm the date of purchase mfg warranty. if not you will have a tech look at it and tell you the video board might be going out.

1. reset it to factory default, by Hold the [exit] button on the remote untill A prompt appear asking you to confirm your choice.
2. Do software upgrade.
For further information, please add you commend.

there is no, on off button. but there is a button on the bottom of your remote just above the pause that reads "P.SIZE" press it to cycle through picture size...16:9, wide fit, 4:3, JUST SCAN. there you have it...