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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/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.
If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.
Given the intermittent issue, this sounds like a faulty electrical connection. Typically the clock and radio will reset when the battery is disconnected, or they lose power through the fuse. I'd check the power lock and radio fuses to make sure they are intact, and even if they are, try replacing them with spares. If that fails, it may take an automotive electrician to track down the faulty connection.
Be sure all fans are working and blow out dust so system can cool properly. If clean, may be power supply or video card. Ensure cables inside are connected properly. Use caution when entering case. Voltages are present so make sure to unplug unit.
sounds like your power supply is bad. this is a big problem with samsung. Caps on the power supply swell and need replacement. this will cause tv to click on and off. Samsung is getting a classaction lawsuit filed against them for this issue.
Netgear generally functions well. You may simply need to adjust the location of the router. Check the signal strength when you do have a signal. You may be losing a signal intermittently because the signal is weak. If your signal is "good" or better and the signal is lost without apparent reason, there could be a malfunction with the router itself. Check the router when the signal is lost and ensure the power light is on and the connection light is on.
If your signal is weak and you lose it intermittently, adjust the location of the router
If your signal is strong and you lose it intermittently, you may be experiencing a connection problem at the source or the power may be cutting out at the modem. The more likely answer is the source signal interruption. It is rare for a power supply to go bad in those.
Check the source connection INTO the router.
You can also reset the router. You'll want to unplug everything. Unplug the power supply from the wall AND from the modem and leave it unplugged for at least 2 minutes. There may also be a very small recessed reset button (the kind that you need to use the end of a paperclip to press). Press and hold that for 10-30 seconds to reset while it's still plugged in.
When you plug everything back in, plug the power in first (to the wall and modem), then connect the source cable. Wait until you have a signal confirmation light, then try to connect with your computer.
Last but not least, the connection problem could be with your computer. Try pluging directly into the source if possible and see how that works. Then try just moving close to the wireless modem and see how the signal strength is and if you lose the signal the same way. If there is a switch on your computer to turn on the wireless feature, make sure it's all the way on. Sometimes these are kind of stuck between 'on' and 'off' and that can cause problems.
There are 4 c5707/5706 in the inverter transformer driving circuits, the cause of the problem was due to poor solder connection in the bias circuits of the transistors. Make sure to check that after you install the new transistors otherwise you will blowthem up. Common problem with this model. When the circuit drwas too much power from the power supply, it will shut itself off to ptotect itself.