Question about Dell W3706MC 37 in. LCD HDTV
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Posted on Jan 02, 2017
SOURCE: Akai LCT2716 Flat Panel TV
I bought one of these tv's at a thrift store and it had the same problem, orange light blinking and static sound coming out of the speakers, no video at all.
The problem was the power supply board, this power supply has multiple outputs that feed the circuitry, 12V, 24v, 5V.
There was nine electrolitic capacitors I had to replace to fix it, all of them were bulged they are easy to spot, I measure one of them that was supposed to measure 1000uF but measured only 65uF. you can buy these from digikey for about 50 cents each, they need to be rated at 105 deg c and the profile has to be below the heat sink otherwise they will hit the top of the heat sink, the spacing between the leads has to be 5mm so they fit in the pcb. I replaced 3 1000uF/25v, 3 470uF/16v and 3 1000uF/16v and that fixed the problem, I bought this tv broken for 100 bucks fixed it with 6 bucks.
Good luck, don't perform repair if you are not familiar with dangerous AC voltage inside the TV.
Posted on Jul 24, 2008
No you don't. As long as you can plug the speakers to the green port on the back of the computer, the speakers are powered and the volume knob on the speakers is turned all the way up. You should hear sound.
Also make sure the sound is not muted in windows.
Posted on Oct 04, 2008
Usually, the crackling indicates a connection that's not making a good connection. you can try twisting the plug where it connects to your computer and see if you can get it to make a better connect. Also, you may try cleaning the plug itself. When cleaning contacts with any sort of household alcohol, be aware that it can leave a residue so you'll need to use a clean/dry tissue to dry the plug and remove any residue. -hope that helps.
Posted on Dec 27, 2008
What sort of computer do you have? Is it a laptop or desktop? Many
laptops have this problem and it is quite widespread in laptops. The
crackling or humming noise could be a result of interference from the
mains power signal.
If it's a laptop, try running it on battery alone (take out the mains power cord). My laptop has this kind of noise in speakers when running on mains electrical supply, but it goes away like magic when I run it on battery.
A more long-term solution is to buy a 'Ground Loop Isolator' and insert it between your computer and the speakers/earphones. They are quite cheap and you could get it for under £10. It removes all static noise and you'll hear crystal clear sound.
Posted on Jan 01, 2009
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