Question about HP Pavilion xl756 (P1358A#888) PC Desktop

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Push switch, no power.

The problem: power switch does not turn computer on. I tested everything from the wall to the computer and know that the problem is the computer. I opened the computer up and used a power meter to measure the flow of electricity. As far as I could tell, there was electricity going all the way from power supply to the power switch. I've dissembled the computer into individual parts (after drawing a picture showing how everthing goes back together). First, Where can I learn the names and functions of all the parts of the computer with photos? Second, the problem could be anything between the power supply and the switch. Really not very many parts to choose from: power supply, mother board, switch & wire. How can I diagnose the problem? Third, where can I shop for parts? Thank you Joshua

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  • Anonymous Dec 08, 2007

    My problem is similar to STINK'S! When the start up button is pushed, nothing happens. There is power to the computer and the green light is lit on the power supply at rear of computer but no boot up....

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If your already inside of the computer the see if the switch is clicking when you turn it on.a lot of the start switches clipin or are glued in and come out of place and the outside switch will not be able to touch the actual switch..

Posted on Dec 03, 2007

  • Anonymous Dec 03, 2007

    if its an hp the start button clips in . one clip at the bottom and two on the top of the switch. if the outer button gets pushed too hard the inner switch will jump out of the wall and fall down on the inside. and you can push the outer one all you want it ain't gonna touch the inside one...

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Please let me know whether the CPU box power LED is on. If it is so, The SMPS ( Power supply ) may be working all right. Try replacing C-MOS battery of the motherboard ( On most of the boards, the battery number is 2032 ) Thanks, Rajesh

Posted on Jul 23, 2007

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I'm With pastorm Or do you have the connection connected - seems stupid enough but sometime's if you take a computer apart you forget to connect the power switch to the mother bord But if that's not it you can get good POWER supply's here http://computerequipment.at/gogocommunications price's start from £4.00 each

Posted on Jul 22, 2007

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It can be the power supply. Does the power supply fan work when you push the power switch ?

Posted on Jul 22, 2007

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1 Answer

Casa Vieja ceiling fan w/remote; worked well. Then wall switch was turned on/off, chains pulled. Everything working: fan high, med and low, and light on/off/dim - except now fan won't turn off !


The chain pulling and switch flipping causes the simple logic in the remote receiver to become confused. Your only hope for restoring normal operation (short of replacement) is to disconnect power at the source, then remove remote battery and press all buttons to eliminate "stuck button" problem. Reconnect power and test operation using only the remote. If normal, you will have to decide whether to disable pull chains, wall switches, or both. If not normal, you will have to try an infinite number of combinations of pull chains, wall switches, and power on-off to get things back to normal.

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Tip

Computer will not power on, computer will not turn on


If your desktop computer will not turn on, you may have a bad power supply, bad wall outlet, bad power cable or a bad motherboard.

Through the process of elimination you can narrow down the problem.

-Some computer power supplies have a on/off switch on the back. Make sure the power switch is flipped to on.
-Make sure the power cord is firmly seated in the wall and power supply.
-Make sure the wall outlet you are using is working or try another wall outlet in your house.
-Try a different power cable. Desktop computer power supplies use standard 3 prong power cables. You can pick up one cheaply at your local electronic store and after testing you should be able to return it(check return policy).

If non of the above resolve the issue, you narrowed the problem down to the power supply or motherboard. The easiest to test is the power supply. If you have a extra compatible power supply you can use this to test. If it does not resolve the issue, you most likely have a bad motherboard and this will need to be replaced. The problem could lie with the two. If you feel comfortable with replacing/testing these components. I recommend going to www.newegg.com for your parts. It is a site I use often.

*Before opening up your computer and digging around inside, please be sure to make sure you have no static on yourself or discharge can damage your computer. Touch something metal(not the pc) or use a anti-static wrist strap.*

-g33k

on May 22, 2011 | Computers & Internet

1 Answer

My lcd screen switch goes green and a message appears "going to sleep" and the switch light goes yellow


1. Verify the monitor's power cord is plugged firmly into the wall outlet and the back of the monitor.
2. Verify the monitor cable is firmly connected to the computer and the monitor.
3. Verify that you have turned the monitor power switch on.
4. If the power light on the monitor is not on, test the wall outlet (plug in a light or something you know works).
5. If the power light on the monitor is not on, try a different power cord.
6. If the power light is on and yellow or flashing, but nothing displays, borrow a monitor from a friend. If that works, your monitor needs replaced.

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1 Answer

Pwoer issue


Hello,
I would remove all the conections to the PC.

USB; Monitor; audio; everything.

Unplug from the wall or mains.

While unplugged hold the power button in for a full minute.

That can be a long time for the finger but you can do it! whistling.gif

Also check on the back of the tower that the Power Supply switch is on (- rather than o)

Next plug the computer directly into a wall outlet and try again.

Thanks.

Apr 19, 2012 | Acer Aspire One PC Notebook

2 Answers

Installed the power supply. Everything is plugged in fine, that I can tell of. I turn on the box, with it plugged into the wall, and hear the normal sound of electricity. I push the power button on my...


check for the fuse on the device or, if the cord has any internal damage in case of plastic moulded plug,there could be internal wiring issue try swapping the cables

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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

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1 Answer

Dryer doesn't turn on. Replaced the power switch


Power switch? Do you mean push to start switch? To see if you have a bad push to start 1st unplug. Open back top panel. Only do this test if you hae two wires going to the push to start switch. Wear gloves so you dont kill yourself. seriously. If you do have two wire then disconnect from push to start. Make sure they are not touching anything!!! Plug machine in. Tunr timer to 60 minutes. Touch wire together then pull apart. If machine kick on replace push to start. If not put everything back the way it was. Jump out door switch. If door switch is jump and still dont work then check motor test. Check harness on motor. If has a capacitor need to check with a cap. tester. You need a service manual to test wheather you have a bad motor. The manual will show you how to properly test a motor (each lead has ohms valve and you have to know what they are to test)

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I have red, metal, beige, and black wires in my ceiling. how do i hook up my Glendale fan?


If you could give me the specs on this (voltage and amperage), I can begin to help. Also, I would need to know what the values of the wires in the ceiling are. Meaning...is Black or Red wire's a Hot wire or switch leg. To find this out. First turn off the circuit breaker(s) at your electrical house panel. There could be two circuits, so make sure to have a voltage tester, or a little induction voltage tester that will help determine if power is on or off. Also, turn your wall switch off designated for this fixture. Now, leaving the wall switch off. Make sure to do this with two people. Turn on the circuit breaker. Either the black or the red wire will be hot (unless there's other circuits involved, which I don't think there is). Once you determine your hot wire, write it down. And then turn on the wall switch. Now, the other wire should be hot now. This is your switch leg. The wire that will operate (on and off) your fixture. Beige is most likely your neutral wire, and will go to the white wire(s) at the fixture. And the metal wire is your ground wire, and should go to your bare copper wire inside of your fixture. So now, turn everything back off (including both your circuit breaker and wall switch). So, Hot wire goes directly to your wall switch. It might be easier to hook up your switch leg first, because then the wire left over will go to your switch. So, Hot wire hooks up to wall switch. Other wire coming from switch, hooks up to the other colored wire (switch leg). The beige wire stays at the fixture and hooks up to the white wire(s), and then the bare copper wire splices (connects) to the metal wire from the ceiling. After you have everything wired, and the fixture put back together. Here's how you test it. Leave wall switch in off position. First, turn the circuit breaker back on. If everything is fine, then you turn on the wall switch. Note: If you're able to leave the fixture in the on position prior to turning the wall switch on - do so. That's why if there's any problems, you'll be a safe distance away. And the worst that could happen is that you trip the circuit breaker. Then, you'll have to recheck everything you did, and make sure all your connections are secure. Well, Good Luck to you, and feel free to ask me any further questions you may have. Jim 

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1 Answer

I have medion akoya s5610 laptop. Power light bottom left comes on when conected but nothing else happens, just black screen, no attempt to boot.No light on power button either


  1. Believe it or not, the number one reason why a computer won't turn on is because it wasn't turned on!
    Before starting a sometimes time consuming troubleshooting process, make sure you've turned on every power switch and power button on your computer:
    • Power button/switch on the front of the computer
    • Power switch on the back of the computer
    • Power switch on the power strip, surge protector, or UPS (if you have one)
  2. Verify that the power supply voltage switch is set correctly. If the input voltage for the power supply does not match the correct setting for your country, your computer may not power on at all.
  3. Check for disconnected computer power cable connections. A loose or unplugged power cable is one of the top reasons why a computer doesn't turn on.
  4. Perform a "lamp test" to verify power is being provided from the wall. Your computer isn't going to turn on if it's not getting power so you need to make sure that the power source is working properly.
    Note: If you have a multimeter or another electrical testing device you are welcome to use that to test your wall outlet (and power strip, surge protector, etc.). The lamp test is useful if you don't have an electrical testing device.
  5. Test your power supply. At this point in your troubleshooting, it's very likely that the power supply unit in your computer is no longer working and should be replaced. You should however test it just to be sure. There's no reason to replace a working piece of hardware when testing it is fairly easy.
    Replace your power supply if it fails your testing.
    Important: In the huge majority of cases when a computer isn't receiving power, a nonworking power supply is to blame. I bring this up again to help stress that this troubleshooting step should not be skipped. The next few causes to consider aren't very common.
  6. Test the power button on the front of your computer's case. It's not a very common point of failure but your computer might not be receiving power because the power button on the front of your PC is damaged and is not actually turning your computer on.
    Replace the power button if it fails your testing.
  7. Replace your motherboard. If you're confident that your wall power, power supply, and power button are working, it's likely that there is a problem with your PC's motherboard and it should be replaced.

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2 Answers

Front panel Ac Switch failing to start computer.


Try these steps.
If Power supply light does not turn on (or no power supply LED)
Perform the following steps, in order, until power is restored or it is determined that there is a hardware failure:
NOTE: If the Power Supply fan spins when the PC is turned on but the light does not come on, it is possible the LED is defective. If this is the case, use the section Power supply light comes on or flashes .
1. Disconnect everything from the PC, including the power cord.
2. With the power cord disconnected, press the power button on the front of the computer. Plug in the power cord and test to see if the computer can turn on. If not, continue using these steps.
3. Replace the power cord with another power cord, like the one used by the monitor.
Test to see if the computer can turn on. If not, continue using these steps.
4. Ensure that the voltage selector switch is on the correct setting, 115V for North America.
5. With the power cord removed, flip the red voltage selector switch to the opposite position, wait about five seconds, and then switch the red voltage selector switch back to its original location.
This ensures that the voltage switch is engaged and set correctly for your country/region.
6. Plug in the power cord and test to see if the computer can turn on. If not, continue using these steps.
7. Plug a lamp into the same outlet to see if the wall outlet has power. Try the computer in a different outlet in order to eliminate the outlet as a possible source of the issue. Test both to see if the wall outlets have power.
8. Remove all extension cords, power strips, surge protectors and any converters that remove ground. Plug the power cable directly to the wall outlet. Test for power. If this fixes the issue, find the device that is causing the issue and do not use it.
9. Use a vacuum cleaner to remove the build-up of dust from the power supply fan vent holes. Make sure that the PC is turned off and that the power cord is plugged into a grounded outlet. Only use the end of the vacuum hose near the outside of the fan entrance.
Plug in the power cord and test to see if the computer can turn on. If not, continue using these steps.
10. If all of the above steps have been tried and the power supply light remains off, use the steps in the next section, use the next section Power supply light comes on or flashes , to reseat the cables and check the power switch connector.

Jan 11, 2009 | Compaq Presario SR1000T (568657) PC...

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