SOURCE: I have 40? LCD Samsung flat screen TV model:
check power supply capacitors..i repair these every day and the power supply is prone to faulty capacitors..the capacitors should have flat tops and if they are bulging or leaking brown fluid, replace
SOURCE: samsung flat screen will not power on
What you have wrong with your tv is in the power supply board, it is a very common problem which you can fix yourself for around $30 this is a MAJOR Samsung problem and thousands of people are having this problem. What you need to do is deenergize your tv and lay it face down on a table so you can work on it. Use a philips screwdriver to remove all the screws on the back cover of the tv make sure to remember where they go for when you put it back together. Remove the back cover and follow the two wired from where your tv power cord comes in and in the middle of your tv they will plug into a board, this is your power supply board. Look for blown capacitors, also check the fuses the tops will be bulging upward and caps have writing on them like 10v 1000uf or 2200 uf and 3300uf are the most common. What you will need to do is replace these with a 16v cap but be sure the uf number is the same, and you need 105 degree rated caps. There is also a negative side to the capacitor which is marked with a stripe and a shorter leg on the bottom, these have to go in the same way or you will blow the board, remove the board with screwdriver and disconnect all wires, now you will need your tools solder, soldering iron, and preferably a solder ****** to remove the old bad caps here is a youtube link that shows u step by step just go there and type samsung power supply repair, and whether you have a vizio, philips or another model that this is posted on they all have samsung power supplies in them so if you are having power problems this is your fix, you should be able to get all your parts at radio shack or on the web. Thank you and votes are welcome and if you cant find the parts get to me and I can help you get them
SOURCE: Panasonic TC-P42G15, plasma flat screen
Please check these 3 boards for blown fuses, bad caps, blown/shorted components.
Power supply, Y-SUSTAIN, and Z-SUSTAIN board.
You should download any one of the PLASMA TV training manuals to learn how PLASMA TV works from the link below, it will help you to get more understanding.
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: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: 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.
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.
Please post back what you find.
Please leave rating if it helps.
SOURCE: My Toshiba flat screen won't
Can you turn the TV usin g the power switch on the TV?
Testing remote control:
The remote control puts out IR (InfraRed) signal that human eyes cannot see, to find out if the remote is sending out the signal or not you just point the remote at the digital camera's Lens (Digital Camera can detect IR), you should see flashing light on the camera's screen when any one of the remote button is pushed. If you do see the flashing on the camera, then the problem is in the TV IR receiver or the main logic board; more troubleshooting with scope will be needed to look at the signals.
Parts: www.shopjimmy.com
www.remotes.com
http://www.remotecontrolscenter.com
http://www.newremotecontrol.com/
http://www.replacementremotes.com
Testimonial: "thank you for the advice. I checked the remote as you suggested and it's working but won't turn the tv on and off...."
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