Question about HP Computers & Internet

1 Answer

Yellow light at mains inlet on when computer switched of and mains disconnected

Posted by on

  • bernard-wats Sep 21, 2008

    maybe I misled its a hp laptop .Only been learning six week.bernard-wats

  • bernard-wats Sep 22, 2008

    problem solved .thanks for help.esp BigFatGeek.Bernard-Watso



1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert that got 5 achievements.


    An expert who has written 20 answers of more than 400 characters.


    An expert who has answered 20 questions.

  • Contributor
  • 32 Answers

I am not sure exactly what is meant by mains inlet. However if you mean that you disconnect the power from the computer after it has been turned off and and there is a light on the computer indicating power is coming to the computer, there is a perfect explanation for this.

Your power supply in your computer, along with your computer's motherboad both have capacitors on them. Capacitors hold electrical current. They are placed in the path of electrical current so that when an electrical current passes through a capacitor if the electrical current is too strong it stores some of that current in the capacitor. If the electrical current is too weak it provides the needed amount of current. So basically a capacitor serves to equal out an electrical current when needed. The capacitors in a power supply are pretty big (about the size of a D Cell battery), and hold alot of charge. Infact it is never a good idea to touch one of these large capacitors cause they will release their charge into you, and they can be quite dangerous.

I said all that to say this: When you unplug your computer those capacitors can still supply a little bit of electricity to your motherboard and cause your computer to show that it is still receiving power. It is perfectly alright for this to happen.

I do believe that this may have been what you are referring to, I hope this helps to answer your question.

Posted on Sep 20, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

All lights flashing

Try powering off the machine using the main power switch for at least 10 seconds, then power back after holding down the top solo and start/stop simultaneously.

You may need to check the drainage pipe and water inlet for blockages. Under the filter inside, you can remove part of the drainage system by removing the silver clip and pulling on the plastic segment.

Wash this through, it has a lovely ball bearing inside, but don spend too long wondering how big it is. Big it is.

Check the tubes, for kinks etc... Always disconnect the water supply before detaching the inlet, and be prepared for a mess, if you do decide to remove the drainage outlet pipe.

Failing this, the following post may help:

Check out this solution to the Miele 24 in G646SC Plus Free Standing...

Feb 18, 2014 | Miele 24 in. G646SC Plus Free-Standing...

1 Answer

Indesit WIL88 red light flashing

Seems that the main control board is hanging up or is not booting up which could be related to fault within the board or a faulty input from the door switch, the mains circuit or the water level sensor or inlet flow valve. check for free water flow , clean the drain and inlet valves, check the door limit switch. If not the board could be suspected.

Jun 03, 2013 | Washing Machines

1 Answer


Mains off the wall, unplug. Shut your wall faucet and disconnect your hoses coming to the machine - at the machine end. Get an old tooth brush to clear out the dirt which may be blocking your inlet valve. If possible gently pry off the fine filters to clean well. Re-insert the filters carefully and re-connect, the hoses. Things shd be okay. Otherwise you just hv to change your inlet valve.
Please click if helped, would help others.

May 26, 2013 | Miele Novotronic Premier 500 Front Load...

1 Answer

My lights on my 2006 endeavor won't turn off

Disconnect the battery for about half minute (negative side) so the compie can re-ajust itself.

Feb 01, 2013 | 2006 Mitsubishi Endeavor

1 Answer

My Samsung WA75B9 Washing machine give an error of 1E if we try to start it how can we dignose this problem?

Disconnect the power for some time and if the machine shows the same errror it indicates a faulty application on the board.
Please make sure that the top lid switch is closing, check the lid switch mounted at the hinges to activate the main controller. check the wires to the switch.
secondly try to disconnect the output lines to the main motor and the inlet valve. if the fault changes then one of these has failed and needs a change.
Otherwise the main program controller is a suspect.

Mar 25, 2011 | Samsung SW62ASP Top Load Washer

1 Answer

We have a Zanussi Washing machine ZWF 14581W. The problem is we have no water entering the machine. I have removed and cleaned the water inlet hose which is not blocked. I have also emptied the emergency...

My guess is that the water inlet valve solenoid is not operating. DISCONNECT FROM POWER. Take top off, The assembly connected to the inlet hose is the inlet valve solenoid. Do you know how to use a test meter? If so remove the wires from the solenoid connect meter to the wires on appropriate range and check for mains on the wires as you start a washing program the machine. THIS IS DANGEROUS SO IF YOU AREN'T OK ASK SOMEONE COMPETENT. You must ensure that the connections to the meter cant touch anything at all when you switch on !!!!!. SO HANDS OFF If mains is getting to the wires at the fill stage the valve is broken. Replace it, it is obviously held by screws. As an alternative you could use a mains tester screwdriver and see if it lights up when touching one of the terminals as fill is selected. If the fill valve is getting power and not operating it's the valve. If not the problem lies elsewhere but you don't mention any error codes so I assume the door switch is OK. If it thinks the door is not shut it won't fill. Hope that helps.

Jan 11, 2011 | Zanussi Washing Machines

3 Answers


This could be a power supply fault,check the volts on the red,yellow and earth lead(black)THE RED LEAD =5VOLTS
Diconnect the pc mains plug from the computer.
Disconnect the power supply leads from the motherboard,and switch on and check the volts on all leads of all those I mentioned.If these are present when they are not connected to the main board,then the problem is with the motherborad,most likely the bios chip is faulty.This chip kicks starts the PC into coming on.Failing this send the PC back to where you bought it and let them fix it.

Aug 07, 2010 | HP Compaq Presario F500 F700 and G6000...

1 Answer

How to factory wire fog lights on a 2000 ford f150. pig tail, relay, and fuse are there. Only no wiring from fuse box.

This is a common problem on 97-00 MY trucks, regardless of the trim level ( XL, XLT, Lariat ).

If you install the fog lamp fuse in the BJB ( aka Battery Junction Box, Engine Compartment fuse panel ) Fuse # 9 ( 15 A fuse ) and jumper the normally open contacts in the fog lamp relay socket ( see diagram below ) the fog lamps should illuminate ( to confirm what you have doing on ).
The problem usually is the main headlamp switch to the BJB is not in place ( this is the yellow wire from the main headlamp switch connector to the relay socket pin #1 ).
One easy route is to make an aux lighting relay & harness, or purchase one online. With this, you can cut the factory ends and attach them to the harness you purchased. There is an air inlet next to where the steering wheel column runs through the firewall. This would give you an easy route to the fog lamp switch. The fog lamp switch, you can buy the factory one, and change the yellow wire from the connector to your added relay, or just add a switch for this function.
This will give you an idea of what the DIY relay and harness would look like.

Hope this helps, more than confuses at this point

Sep 16, 2009 | 2000 Ford F150 Flareside SuperCab

1 Answer

Yellow blinking light and no power

You did not specify the brand but I assume it's a Dell and no beeps are heard, no CPU fan is turning on, only blinking yellow light. This brand usually experiences this problem.
  1. First, check the power supply. Disconnect connectors from the board and make a jumper wire for the green wire to any black wire. If the PS fan does not spin then it's busted, else proceed below.
  2. Reconnect connectors except the one with 4 wires, 2 yellow and 2 black, then switch on. If CPU fan turns on then you have a bad processor.
  3. If the fan is still not turning on then check the USB port pins for short circuit.. disconnect it from the board and switch on.
  4. Do the same with other hardware connected to the board.
PS: The metallic casing of computers must be connected to the common ground of the power utility to protect it from stray currents that result to damage of sensitive components such as processors, memory and hard disks.

Aug 06, 2009 | Computers & Internet

1 Answer

Indesit washer wil 103

Check your water inlet valves. Seems like the valves have went away. Also check the computer board and inline fuse to make sure everything is correct. Inlet valve are located behind the supply line hoses. Please rate. Thank you

Feb 14, 2009 | Indesit W 123 Front Load Washer

Not finding what you are looking for?
Computers & Internet Logo

Related Topics:

85 people viewed this question

Ask a Question

Usually answered in minutes!

Top HP Computers & Internet Experts

Les Dickinson
Les Dickinson

Level 3 Expert

18408 Answers

Doctor PC
Doctor PC

Level 3 Expert

7733 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Are you a HP Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides