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No power when connected to power supply no led lights on

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Check another power outlet that you know works for sure. If the outlet is the problem then check the cord or you might have to replace the router itself.

Posted on Nov 04, 2014

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Posted on Jan 02, 2017

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No Picture on LED TV. LEDs not operating.


Back - light problem. 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.

Jun 24, 2016 | Televison & Video

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Dead toshiba satellite laptop


If the adapter is OK thenconnect it to the laptop and power it up, then look at the power/batterycharging LED light and wriggle the power plug in the laptop's powersocket. If the power/battery LED light flashes and in a certain position thisLED light stays firm, then the power socket is either faulty or it has a drysolder joint where it is connected to the motherboard.This can be repaired but itrequires the laptop to be completely dismantled to get at this power socket andrepair. If you cannot DIY then I suggest you get a quote first.

Aug 01, 2012 | Toshiba Sattelite A105-S2071 Notebook

1 Answer

How to install 12 volt led light bulbs in the 220v Power Supply


Buy a lamp holder and 220V AC to 12V DC power supply, power supply should exactly be connected with the positive and negative holder, plug in the power, 12 volt led light bulbs can be used.

Dec 01, 2011 | Cars & Trucks

1 Answer

Imac intel will not power on


Possible failed video card. 3rd LED indicates MLB and GPU are communicating: (CAUTION! There is high voltage from the powersupply so any attempt to open iMac other than removing glass panel to see the indicators...should be done by authorized ACMT)

  • LED 1 - Indicates that the trickle voltage from the power supply is detected by the main logic board. This LED will remain ON while the iMac is connected to the AC power. The LED will remain on even when the computer has been shut down or put to sleep. The LED will turn off only if the AC power is disconnected or the power supply is faulty.
  • LED 2 - Indicates that the main logic board has detected proper power from the power supply when the computer is turned on. This LED will be ON when the computer is turned on and the power supply is working correctly.
  • LED 3 - Indicates that the computer and the video card are communicating. This LED will be ON when the computer is communicating properly with the video card. If LEDs 1 and 2 are ON and you heard the startup sound, but LED 3 is OFF, then the video card might be installed incorrectly or need replacement.
  • LED 4 - Indicates that the computer and the LCD display panel are communicating. This LED will be ON when the computer is turned on and video signal is being generated. If the LED is ON and there is no image on the LCD display panel, the LCD display panel or inverter might be installed incorrectly or need replacement.

Aug 01, 2017 | Apple 24" iMac Desktop

1 Answer

I have a mackie 3208 (8bus series) thats leds wont work. I opened it up to clean it and for some reason 4/10 times when i turn it on the leds work, the rest of the time no led works (meter bridge,...


Howdy, As i informed you in our chat the most likely source of your problem is the supply of power to the led lights. Check the power supply lines and try to trace for any breakages in contact from the beginning to the end. For the power supply.
Usually there are only 2 possible problems to led lights and they are light burn out or power failure due to a breakage in the flow of power from the point of power supply to the led light. Considering that all the led lights cannot burn out at the same time the problem is from the supply of power to the led lights. Trace the power source for inconsistencies.
Hope this solution has been helpful?
Thank you for visiting Fixya.

Jul 19, 2011 | Computers & Internet

1 Answer

Dell inspiron 6000 dead when connect power adeptor to laptop the led light on psu goes off is this mother board fault or psu.


If the led on the power supply turns off after connecting it to your laptop, the problem most likely lies with the power supply especially if the machine will run on battery power. This can be tested by

1. Turn the laptop off.

2. Remove the battery and power supply plug.

3. Press and hold the power button for at least 15 seconds to reset the laptop.

4. Replace the power supply plug into the laptop without replacing the battery.

5. If the computer will not start and there are no lights turning on on the laptop the power supply is bad.

6. Replace the battery and attempt to start the machine both with and without the power supply plugged in.

Apr 04, 2011 | Dell Inspiron 6000 Notebook

1 Answer

How can you tell if a Dell power supply for a PowerEdge 2900 is good? Should the lights at least indicate when power is connected even with the PS is removed from the machine? How do you best determine if...


You cannot test the power supply on the bench just by connecting it to the mains power. You need to know which pins on the connector to activate the power supply and you need to connect a load to the power leads.
The best way to test the power supply is to leave the power unit connected to the computer power up the computer and test a spare 4 wire power connector with a multi-meter. Leave the other power leads connected to the various drivers.
If computer's power LED should light up then test the voltages.
The Red and black wire should read 5 volts.
The Yellow and black wire should read 12 volts.
If the power LED does not light up, check the mains lead in another appliance to see if the mains lead is OK.
If the mains lead is OK then most likely the switch mode power supply has died.

Dec 28, 2010 | Dell 930-Watt Power Supply

2 Answers

Hp desktop power wont turn on


When you powered it on, does the power supply fan spinning? If not, then you might need to change the power supply. It may got the led light lit on, but it does not have enough power to turn on the entire computer.

Dec 21, 2009 | Cameras

1 Answer

Power supply jack on Acer Aspire 3680 Laptop not macking connection. checked power supply and it is putting out 19.2 volts. How do I go about changing jack?


If the adapter is OK then connect it to the laptop and power it up, then look at the power/battery charging LED light and wriggle the power plug in the laptop's power socket. If the power/battery LED light flashes and in a certain position this LED light stays firm, then the power socket is either faulty or it has a dry solder joint where it is connected to the motherboard.
This can be repaired but it requires the laptop to be completely dismantled to get at this power socket and repair. If you cannot fix this yourself then I suggest you get a quote first.

Nov 03, 2009 | Acer Aspire 3680 Laptop

1 Answer

Power LED on but no boot up


it could be your power switch, veriy that it isnt the power supply by

1.) un-plug it from the main board
2.) look at the main board connector(one coming of the power supply)
3.) you should see green wire and next to it a black one
4.) using a paper clip bridge the too wires
5.) if it works proceed to net step if not get a new power supply

to check case switch and board switch

1.) plug in power supply to main board
2.) look at the pins where the power button connects to
3.) using a metal object (blade screw driver) bridge the pins

if the board should start up>
then its your power button on the case that is bad, you can try to repair it, chage it or buy a new case,

if it doesnt work.
1.) ensure that jcms(jumper to flash the bios) is set correctly
2.) unjack each drive one at a time to see if any is causing stalling
3.) get a new main board

Jan 02, 2008 | EliteGroup L7VMM2 Motherboard

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