What Model number do you have and all that good stuff??? If you have the board Installed it should be a white Plastic female connection almost on the bottom left side of the board.... let me know the basic info on your MOBO and i can give you a better Idea....
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clean the jack on the back of the tv. might be losing connection, can also be the the cable connection. so try using a different one, switch cleaner and the tv off at power before spraying the switch cleaner. also use an old tooth brush to remove any dirt. and spray again don't turn tv back on till it has dried. if after all this and its still the same this could be a problem with the connection to the board, and could need re soldering back on. or the controller chip for the av control has a problem, can be a build up of dust that has made its way into the chip joints, switch cleaner and brush should clen this out. dry joints on the board can also do this as when thy warm up they will disconnect and be no signal. while you have the back off the tv clean out the dust build up even on the back of the boards with an paint brush and a hoover. this will help the tv. clean out as much of the dust out as you can. but don't be to ******* the av board as this has small parts on this and if you knock a resistor etc off you will not be able to find were its from without a semantic. just spray switch cleaner and wipe around with the brush.
If the motherboard can detect an error, by itself, it should be in the post Power On Self Test.
If the board did not beep, it could not find an error.
Perhaps you should look in the startup menu, if the post is switched off. Sometimes people switch it of to safe time during startup, but it only takes little time for the computer to do the test.
Perhaps you do have a manual for the board (if you did build the computer yourself, then you can read all about post.
perhaps you copy and paste this line in Google and add the model name and number of your board. See what you can find.
Boston Acoustics Media Theater HUM. The problem may be the power source. Find another DC power source for the 12 volt. All I had was a 14.5 volt 4.5 amps source Model PS6 power source which fit the plugin socket. Absolutely no hum now and still great sound. However, I would recommend a DC 12 volt source with at least 3 amps output.
Their is really no diagram to show you how to hook up your supply.
You only have a hand full of plugin connections.
Your 24 pin connection to the mother board, you may or may not have a 4 pin 12 volt video connector, which has to be connected if on the board., and your fan connections.
Everything else is controled thru the motherboard.
unplug for 10 seconds and plug power cord back in. This will remove the static build-up charge and the system will work fine again for a while when you will eventually have to do it again. They all do this because there is no ground plug on the outlet plugins
There isn't any control circuit, unless you mean on the system board. The power switch is just a simple normally-open pushbutton switch that's wired to a 2-pin plug (or 2 pins in a larger plug) that connects to the system board. When you push the button it signals the system board to turn on the power supply and start up. If you're having the problem that your computer isn't starting, you may have a bad power supply or system board.
Troubleshoot like this: 1 - With the generator control in Auto, jumper from terminal 3 to 4 on the control board. Generator should start without transfer switch doing anything. If it won't you have a bad controller board.
2 - If the Generator started, remove the jumper - controller is OK. Next go to the 1st transfer switch and find the remote start terminals. These will be the same wires that were connected to controller terminals 3 and 4 at the generator. Use your jumper wire to connect them and see if the generator starts, if not there is something wrong between the switch and the generator, probably a broken wire.
3 - Don't forget to check the other switch, the remote start terminals of the switches connect in parallel across controller terminals 3 and 4 so that either switch can start the generator.
4 - Each switch should have some sort of a test button/switch, power down as much of the building as you can, then run the test function of each switch one at a time. Don't stand directly in front of the switch while you do this.
I know this may sound too simple, but if you are replacing the Power Unit due to and old one blowing, it may well have blown fuses. Check them! in all mains plugs related to PC.
Also, are ALL you connections made. I.e. take off the front cover and check that the power button connector is attached to both button and board.
what are you running? do you have NVidia Cards Running in Dual sli mode? - this is power hungry, you'll need 500w plus, i have a 600watt unit for this (i run 2 x 9600's in sli mode - i know 400w would never cope with the power demands of CPU's -quad- and GPU's - Dual - plus the 3 or 4 fans you will have on-board.
A little more info on the machine you are building/running would help.
a common old circuit tester would help out here also, to find out if power -when switched on at the main rear switch - is reaching the board, Are there any leds etc on at all?
I hope this is some help, .... Double check all connections...
otherwise post back with system spec and i will find a more precise and definite answer for you..