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I have a window air conditioner that will not work. Ihave power from the outlet because I tested it with a tester.what are some possible solutions

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  1. Has it ever worked before? It could be a manufacturer's defect.
  2. Make sure the power supply is firmly connected to the air conditioner.
  3. Try using a new power cord (if possible)
These are the first 3 things that I would try. How old is the air conditioner? If you are still under warranty, try calling the manufacturer.

Good luck!

Posted on Jul 25, 2008

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My Compaq Presario SR5140NX will not turn on. No lights at all. Is there a way to test the power supply using a multitester? Roy

could be a lot of factors that would cause it to not power on. try to isolate them one at a time starting from the very obvious. often we may overlook something just because it seems too easy and obvious. i would suggest checking the power cord making sure it is securely attach to the power supply of your computer and to a verified working power outlet. if by any chance you are using a surge protector or UPS, try to disconnect them temporarily and directly plug the power cord to a working wall outlet. if you have an extra power cord, try testing it. a faulty cord will cut the power flow from the outlet to your unit. next, remove all attached devices including mouse and keyboard to the tower/unit to make sure none of the external devices is causing a possible short to the system. another thing to try as you said is to test your power supply. unplug the computer from the wall outlet, press the power button for about 10 to 15 seconds just to drain any residual power. Then disconnect all cables/connectors of the power supply from the mainboard/motherboard and other internal devices you have. This is to isolate it from the rest of the computer. You can then use your short the pin 15/16 from the 20/24 pin connector using a paper clip or a piece of wire to allow you to see if the power supply fan will spin which will tell if it is at least working or generating power. from there, you can use a multi-meter to test it. Instead of laying down all the steps, it may help checking some guides online on how to perform a tester. you may check this one as it has some images that may help you go through the process.
if you have isolated that your power supply is faulty, you will need to get a replacement. if you have confirmed it works, next thing to try is to minimize the internal devices on the computer and reset the cmos jumper. check the manual for your computer for the reset jumper settings/pins. be sure to remove the cmos battery then set the jumper settings, and plug the 12 volts or 20/24 pin connector from the power supply back to the motherboard. plug the power supply to an outlet and see if the motherboard will have any light, will generate any beep or if the fans will spin. if so, allow it for a few seconds, then turn off the power supply switch or unplug it if it has no switch. adjust the reset jumper back, put the cmos battery back then try to switch the power supply again. if it fails to power on, most likely a replacement motherboard is needed. on the other hand, if it powers up, then try to connect internal devices back to the motherboard and power supply testing the power each time to see if any of the components is actually shorting out the unit until you identify what may need to be replaced. if you get lucky, resetting the cmos jumper alone may fix the system without the need to replace anything. hope this helps. good day

Feb 20, 2015 | Compaq Computers & Internet

1 Answer

My HCL pc has a power problem it can't turn on

usually, either a faulty power supply or motherboard can cause this though it would also be a good idea to test other components. try the easy steps first. try another working power cord and power outlet. at times, a faulty power cord will or failing outlet are the culprit. should that not work, move inside. unplug the computer and try to disconnect all components connected from the outside of the computer, then open the casing and remove the all memory modules, add-in cards, storage devices and all connections to the motherboard. if the power supply has a LED indicator or a test button, plug it to a working outlet, then use the test button or check if the LED on it will glow to at least help indicate if it has power. If no indicators, unplug it again, press the power button on the computer to drain any power remaining. Once done, check the motherboard for visual signs of issues like leaking or bulging or burn capacitors. if none, use the reset jumpers in the motherboard, remove the cmos battery, then reconnect the 4 and/or 12 pin power to the mainboard, plug the power supply and try to power it on. if it powers like fan spins, try to power it off and unplug it after about 10 seconds. reconnect all devices inside one by one and keep testing the computer to see if any device will prevent it from turning on so you will know which component may need to be replaced. else, try swapping parts if possible starting with the power supply, memory and last would be the motherboard.

hope this helps.

Sep 02, 2013 | Computers & Internet

1 Answer

The screen reads no signal

eMachines flat-screen monitors offer high quality at low cost.
eMachines flat-screen monitors are compatible with most brands of PCs.
Issues with eMachines flat-screen monitors can arise from faulty power sources, cable problems and incompatible settings.
These issues can be resolved by testing step-by-step each possible cause.

Plug the computer's power cable firmly into a working AC outlet.
Press the computer's power button.
Check the LEDs on the front of the computer case to confirm that the computer receives power.
Plug the eMachines monitor's power cable into a working AC outlet.
Press the monitor's power button.
Check the LEDs on the front bezel or power button of the eMachines monitor to confirm that the monitor receives power.
Orange or blinking LEDs indicate low power or no signal.
Green LEDs denote a working connection..

Perform a monitor self-test.
Switch off the monitor.
Unplug the video cable from the monitor.
Press the eMachines monitor's power button.
An eMachines logo, Windows logo or "no signal" message indicates that the monitor is working properly.

Plug the eMachines monitor's video cable into the video port on the computer.
Attach the monitor's included DVI-to-VGA adapter to the monitor's VGA cable if your computer has a DVI port (15 or 25 pin-slots with 1 side slot) in place of a VGA port (15 pin-slots, no side slot).

Press the eMachines monitor's input button to change the monitor's setting to match the computer port used.
Set your monitor to DVI if connected to your computer's DVI port.
Set your monitor to VGA if connected to your computer's VGA port.

Connect the eMachines monitor to a known working computer with a known working video cable if the problem persists. Contact Gateway, eMachines manufacturer, if the monitor issue is not resolved.

Jul 15, 2013 | Acer eMachines Black EL1850G-42w Desktop...

1 Answer

When i cleaned my dell demension i put everything back exactly how it was now when i turn on my computer none of my external devices mouse pc screen keyboard is not turning on i need help

I would first check and verify that the electrical outlet or power strip that they are plugged into is working. If a plug gets in a bind it could have blown a fuse on the power strip or the power strip might have a reset switch on it. Or the power strip might have failed. If you have a uninteruptable powersupply that you plug everything into you will need to confirm that it is working as well, test it and look for reset buttons or a fuse holder on it. Your electrical cords could have been pulled out from the wall outlet itself while cleaning sometimes even wall outlets if put in a bind from pressure will blow a fuse or the cord might pull out just enough that it is not making a good connection.
You might get a lamp with a bulb that you know works and plug it into the same electrical receptical that you have the dell computers power cord plugged into and then test the monitor power source the same way.
If the outlets or power strip are getting power and that is confirmed by testing them, and then you plug in the Monitor and Dell power cords into the sources that you have confirmed are getting power, and they do not come on we have a different problem.
If the monitor is hooked up wrong to the computer or not even hooked to the computer the light should come on on the front of the monitor incicating that it is getting power. If you plug it into a confirmed working electrical outlet the light should come on on the power button of the monitor. If it does not come on then somehting might hve possibly damaged all of the epuipment that was plugged in like a power spike on the electrical lines going into your home, this would be very rare but not impossible.
I am sorry for all of the senerios but you were not really clear on what you were using as power sources going to the equipment and I wanted to try and cover the most common possibilities in one email. Please let me know if this helps

Aug 02, 2010 | Dell Dimension E521 PC Desktop

1 Answer

Blue screen came on then the computer went off and will not boot up. will re installing windows xp work or what do i do?

Due to your diagnosis, it sounds to me like Power Supply failure.

Weak Voltage power rail.
Not enough power to keep the Processor on.

(In this case, No, re-installing Windows in a Repair, will not fix the problem)

Lights will light, and fans may spin, but there isn't enough power for the Processor.

1) ALL the lights use less than 1 Watt of power.
2) EACH fan uses 2 to 3 Watts of power.
3) A typical Processor can use 51 to 125 Watts of power. Depends on what Processor it is.

(For example, if this Optiplex GX260 was ordered with a Pentium 4, 2.26GHz Processor, {Socket 478}, it can use up to 58 Watts,

If this computer, and Power Supply are dirty inside, it's a pretty sure bet the Power Supply is bad.

Test the Voltages of the Power Supply to see if they are correct. Specifically the 12 Volt power rail.
If it is 11 to 13 Volts, it's okay.
Less than 11 Volts requires replacing the Power Supply.

Test can be done with an inexpensive multimeter, or a power supply tester.
One example of a power supply tester,

Jun 10, 2010 | Dell OptiPlex GX260 PC Desktop

2 Answers

Dell 3100 no power

Hello there:
If this computer was working before the power went out and now that the power is back but the computer is not working would lead me to believe that the fuse in the power supply has failed or the circuit board in the power supply is bad and must be replaced.
If you feel like you can do this work and want to open it up the fuses on the inside of these are located on the green circuit board that sits to the right side of the power supply. . staples or radio shack will have them ok i hope that this is very helpful for you.
best regards M

Oct 24, 2009 | Dell Dimension 3100 PC Desktop

1 Answer

Programs shut down at random

Have you checked in your case to see if all your fans are working? May be a heat problem in power supply, CPU. Get this software and install to check the actual temps on your motherboard.

This is the free program I use.

Here is also a website that talks about overheating problems and solutions

Apr 26, 2009 | Gateway GT4022 PC Desktop

1 Answer

System turning completely off for no reason then rebooting automatically


That kind of problem is very common to all computers. There are three possible causes. the power supply got shorted, The memory got dump and cannot resist to load the operating system. The system got conflict both the hardware's and software's.


1. try another functional power supply or test your power supply with appropriate tester.
2. REmove and clean the memory both the bank and the chips and test. if same problem occur then try another functional memory.
3. last; format and reinstall the hard drive to renew and refresh all setting and install all the drivers.

if these solution won't work that the time that the motherboard got shorted. however if in the first boot the system display it bios then that can be resolve.

tell me if ever what happen.


Oct 19, 2008 | Dell Dimension 5100 (D51L1) PC Desktop

4 Answers


Possible solutions:-
1:) Faulty Ethernet Card or Slot on motherboard. Possible sharing violation.
2:) Faulty-Broken-D Cable.

Solution:- remove card, and insert into another vacant PCI Slot.
check cable for kinks or breaks.

Mike @ Compurepair.

Jul 23, 2008 | HP Pavilion A610n (PC106A#ABA) PC Desktop

3 Answers

Dell E510 desktop

Hi Asif,
Did you install there something new on it? Maybe could help to push the F8 key after POST (just after the DELL logo disappeared and before Windows logo would appear) and choose to start with last configuration which worked. If this doesn't help then after F8 choose to start in Safe Mode and uninstall the failing application after you log into Windows.

May 30, 2008 | Dell Dimension E510 Dual Core 2.8 Ghz...

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