Question about DFI LanParty KT400A Motherboard

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Red lights on board

I replaced the caps that gotten damaged and now when I plug the pc up it lights green. When I press the power button they turn red. What is causing this? Also where can I get the diagram on how to wire this board again to make sure i have it correct

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I never had green lights on my motherboard, they have always been red and it runs fine. the mother board was made with red led lights. if its not working right, it's probably the switches on the mother board, normally make the first switch on, and the other 3 off.

Posted on Jun 20, 2010

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My xbox 360 had gotten the red ring, so I heated the mother board with a heat gun and then replace the thermal paste, now the power brick is orange/yellow when plugged in, turn on the box it goes green for...


We STRONGLY recommend you not to use heat gun as it can heat other components, when your system have 3 red light and no fan are spinning it means that one of your fuses has gotten damaged and no power can go through your GPU chip.
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I have a 37" Philips (37PF9431D/37) flat panel tv. It won't power on. When you plug it in you can hear a click the green light stays on for a few seconds then goes out. I've checked the power board for bad...


i am having the same problem. My Phillips 37" 37PF9431D/37I LCD High Definition TV won;t turn on. When I press the power button i hear a click and the green light comes on for a couple of seconds and then the red light appears. I can;t figure it out. Did you find a solution?

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Have TV AOC L32W761 When i turn it on light turns green but screen is black.... After that no reaction on pressing any buttons... Even turn off... Light stays green...


This sounds like a problem with the power supply. Usually capacitors on the power supply board tend to dome, bulge or dry up. The damaged ones can be seen on the power supply circuit board when the back is removed. The dry ones have to be removed and tested. The caps can be replaced at a repair shop for around $200, but if the power supply board has to be replaced it can cost a little more. It all depends on the shops repair fees.

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Nonstop blinking is likely a DM or format board - format board most likely. I have rebuilt several of these by simply replacing all the caps, about 70 of them, and takes about two hours start to finish... But this set does need to boot. It takes about 70 seconds of flashing green light before you're able to press the power button - even when everthing is working as it should..
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The green light comes on then turns to yellow.


if you look at the capacitors on the boards you will find several of them that are domed or blown, these are the most likely cause of the problem. you can find replacements for any capacitor online at electronics supply stores, like radio shack but don't try them they don't supply enough different types. you can also find examples of blown capacitors by doing a search for "blown capacitor image" on any web search. unsoldering these bad caps and replacing them with identical values like 220uf (microfarradys) and say 25 v(volts). these caps have a + side and a - side the caps are marked and so is the board. hope this helps.


Mar 20, 2009 | Proview PL926WBi 19" LCD Monitor

1 Answer

Red light


System does not power on and the LEDs on the front of the computer are not flashing.
System unable to power on.
Press and hold the power button for less than 4 seconds. If the hard drive LED turns green, then:
1.Check that the voltage selector is set to the appropriate voltage.
2.Remove the expansion cards one at a time until the 3.3 V_aux light on the system board turns on.
3.Replace the system board.
OR
Press and hold the power button for less than 4 seconds. If the hard drive LED does not turn on green then:
1.Check that the unit is plugged into a working AC outlet.
2.Open hood and check that the power button harness is properly connected to the system board.
3.Check that both power supply cables are properly connected to the system board.
4.If the 3.3 V_aux light on the system board is on, then replace the power button harness.
5.If the 3.3 V_aux light on the system board is off, then replace the power supply.
6.Replace the system board.

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Viewsonic N3251 doesn't turn on right away


Solution... Call viewsonic and **** till you get a new one (diff model). Good luck, you're going to be on hold forever.

Nov 15, 2007 | ViewSonic N3251w 32 in. LCD HDTV

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