Top 20 Samsung LN-R409D 40 in. LCD Television Questions & Answers

Good day, Maybe some more information needed here. Do you see a flash from the screen at all? Do you see the Samsung splash logo, and then the TV shuts down? If so, this is the safety working on the TV. The power board senses the voltages needed to power the back lighting. If there is a wrong level, shutdown occurs to protect the TV. Could be a bulb, or the power inverter board. Good luck...

check the mute control on your remote and on the tv. mute button is at very top of tv

Hi there Check , as I am sure you have, if the sound is on mute. Try other channels and check all cables and connections. Good luck

If a tiny area it may be the LCD display panel itself--fatal.If one half or screen left-right or up down it could be an inverter issue.

Describe the issue if you can please.

You have bad T-CON board, check the surface mounted fuse (2A fuse) to see if it is blown, you may want to replace the board, common failure in this model.
http://s807.photobucket.com/albums/yy352/budm/SAMSUNG/SAMSUNG%20LN-R409D/

Read below for more details:
First, look at the screen in darkened room to see if you can see any slight glow from the screen, if it does, then the problem can be the T-CON (not getting the 12vdc) or the main logic board not feeding the signals to the T-CON board. if not, next place to check will be the power supply module, make sure it has 24vdc which is required by the backlight inverter to work, the reason for not having 24vdc can be from bad DC filter caps (leaking/bulging top, high ESR) or short circuits in the inverter board which will cause the 24vdc supply to go into shutdown mode, so you may have to disconnect the power cable that feed the inverter board to see if the 24vdc will work without the inverter board hookup, you will need to apply about 3~4 amp of load to the 24vdc to make sure it can handle that. There are fuses on the backlight inverter boards also. So there is some troubleshooting you will have to do to find out the causes of the problem you are having. If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on: Basic LCD monitor and TV troubleshooting guide: http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting http://www.fixya.com/support/r7406380-tv_training_manuals Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague Parts: www.shopjimmy.com Parts: www.interliquidparts.com Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps. Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.

check all bad capacitor in power section

Is this the one you have? Not sure what rivet you are talking about, the HMDI is surface mounted, it may just need to be resolder carefully back on.
http://s807.photobucket.com/albums/yy352/budm/SAMSUNG/SAMSUNG%20LN-R409D/

U are out of luck,because the tvs LCD screen panels are 90% important tvs and it is very limited in productions by the tvs corporations only.The tvs corporations they'll sell the tvs LCD screen panels to u.But they'll charges u same as a new tv.Sorry ur tv have broken or damages LCD screen panel now,only can be used as salvages tv for it electronic boards only now.

Hi there
Im afraid this sounds like a fault with the TV. Try turning it off at the wall for 3 minutes, and then with nothing plugged into the TV, turn it back on. If the problem persists contact the manufacturer.
Hope this helps
TV_Doctor

video input malfunction.....
video board...locate reputable Samsung service dealer

you can use another TV to test the cable.

Two causes: The T-Con bd is bad or the Main bd is bad.
Start with the T-Con bd first.

You will need to have the power supply board replaced. This is a common problem and Samsung has re-designed the new boards so this will not happen again. You can call 1-800-samsung for the nearest authorizd service center.

There are two places to look for the problems, the backlight inverter board and the power supply. Look at the power supply first since it is easier to get to, look for burnt parts, bad capacitors, etc. Look for 5vdc, 12vdc, and 24dvc.
http://en.wikipedia.org/wiki/Capacitor_plague
Parts: http://www.shopjimmy.com/catalogsearch/result/?q=Samsung+LN-R409D+
Please post back what you find.

Hi,
That is a common problem with Samsung some capacitors on the power supply are bad. (Look for caps that are rounded on the top they are supposed to be flat, most of the others will be) You can replace the bad caps for just a few $$$ the value of the caps are written on the side like 1000 mf 10v etc.. you can find them online just about anywhere. If you need o pay a repairman see if they will do the caps, many will replace the whole board and easily become a $300-400 dollar repair.

This link Samsung Lawsuit is to an article that has info on a law firm buildin a case to go after Samsung or this very issue. Good luck!

you need to go into the service menu and adjjust the option bytes. When you upgraged you changed them. The other solution would be to replace the main pcb

Try shopjimmy.com , Good Luck

Need to replace main board