If therte is a switch on the back of your pc on the power supply check to maske sure it is switched on. if that all checks out try directly connecting the cable to the wall socket if your arnt already doing that. if that doesnt workout check to see of your surge protector if you have one and see if the switch is on. if all those options fail you are going to have to go into the pc case. check the cpu power cables. they are a 4 pin connector in a square shape usually and placed next to a big fan wit a heat sink on the mother board. give that a riggle and push to make sure it is connected. plug the power back in and see if it works. if the problem still isnt solved you can if you know how too check your power button connection on the motherboard and give it a little riggle. if that all still fails then i think your power supply is no good.
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Make sure you are set up for correct monitor. If keyboard lights flash and HD beeps, but no picture, you may have an incorrect monitor setup. In BIOS, make sure you are set for proper internal/external video, and be sure to plug into right port.
No Power on an HP Pavilion PC Desktop b> Desktop computers are simultaneously more complex and easier than laptops when it comes to troubleshooting. There are more physical components on a desktop, so locating a specific troublesome part can be tricky, but working inside of a desktop computer is straightforward compared to opening and fiddling with a laptop. Power problems are always hardware problems. There are a few simple, preliminary steps to troubleshooting, but power problems often require opening your computer and having a look inside.
The Basics Unplug everything from your PC except for the power cord. Try turning on the system and look for lights on the front, then on the back. When the power supply is on (receiving power), the small light beneath the plug turns green. If this light doesn't come on, the problem is either connected to the cord or the power supply. Try swapping power cords with the monitor cord to isolate the cord as the source of the problem. Look closely at the voltage selector and make sure it's set appropriately for your country -- 110 in North America and 220 for most other regions. b> The Socket b> Unplug the power cord and switch the voltage selector to the opposite setting. Wait five seconds, then flip it back. This ensures that the switch is engaged. Plug in the power cord again and try turning on the PC. Check the outlet to make sure it's working, and plug your computer direction into the wall socket (remove it from any surge protectors or power bars). Check the power button. If it sticks when you push it, it may not be making contact to engage the system power and will need to be replaced. If the button is going in and out freely, you've done about everything you can do from the outside of the computer. It's time to go inside. b> Open it Up b> Unplug the power cord and hold down the power button for five seconds. This clears all electrical charges from the circuitry and makes it safe to open the computer. Remove the side panel from your system. This process varies a bit from model to model -- some have one or two captive screws on the back of the system, some have an easy release button. Check your manual. b> Power Button b> Locate the power button from the inside and trace the cables to where they plug into the motherboard. Lift up on the connector and then push it firmly back down. Plug the PC back in to its power source and try to power it on. Unplug the computer immediately if the system doesn't power up, and continue troubleshooting. b> Hardware Components b> Disconnect each of the devices in your computer one at a time to locate a faulty piece of hardware. Power cables run from the power supply connect to your optical drive, hard drive, floppy drive (if one exists) and into several places on the system board. This step takes some trial and error detective work and a few minutes: unplug one device, reconnect the power, and try turning on the system. Then disconnect the AC power, plug the device back in and try the next one. If the system powers up at any stage, the device you are unhooking is shorting out the power and needs to be replaced. http://www.youtube.com/watch?v=HJvYGtbwmh8To Replace HP Pavilion Desktop Power Supplyhttp://www.youtube.com/watch?v=VcEFUpZSmI4Hp Pavilion 750n desktop computer basics on this computer b> http://www.youtube.com/watch?v=D8Y2PPMiiB0HP Pavilion Slimline PSU Upgrade Guide This guide compares the Sparkle SPI270LE - 270 watt PSU against the Shuttle PC50 -300 watt as possible power supply upgrade for a HP Slimline. The s3600t Slimline I used for this video has a Intel Hope this helps.
check your power cords, check your outlets, check your surge protector, check the switch on the back of the pc. there may be a black toggle switch with a circle and a line, make sure it's flipped to the line side. if all that is normal, unplug the cord from the computer and open up the case. look at all your power plugs and make sure they're all secure, try and reseat the 1 or 2 main plugs, there should be a rectangular 12 pin plug and maybe a 4 pin plug. unplug them and then plug them back in. put the case back together plug it in, and give it a go. if still nothing then you have to troubleshoot whether the power supply is junk or if your motherboard died. we'll move on to that if it comes up. good luck!
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
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.
Power supply light on or flashes
Perform the following steps, in order, until power is restored or it is determined that there is a hardware failure:
This product contains components that are easily damaged by ElectroStatic Discharge (ESD). To reduce the chance of ESD damage, work over a non-carpeted floor, use a static dissipative work surface (like a conductive foam pad), and wear an ESD wrist strap that is connected to a grounded surface, like the metal frame of a PC.
Disconnect everything from the computer, including the power cord.
With the power cord disconnected , press the power button on the front of the computer for five seconds.
Plug in the power cord and test to see if the computer can turn on. If not, continue using these steps.
If the power supply fan makes an inconsistent grinding sound or stops and starts erratically, replace the power supply
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. Ensure that the voltage selector switch is on the correct setting, 115V for North America.
Performing this step ensures that the voltage switch is engaged and set correctly for your country/region.
Figure 4: Voltage selector switch
Plug in the power cord and test to see if the computer can turn on. If not, continue using these steps.
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.
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.
If you find the device that was causing the problem was a surge protector, resetting a breaker or fuse on the surge protector may fix the issue.
Remove all attached devices except for keyboard, mouse, and monitor.
Remove any internal component that was recently added, such as video card, memory, CD, DVD, and hard drives. An added device may take more power than the power supply is rated for. If the problem goes away when the component is removed, the only option is to upgrade the power supply to power supply with a higher wattage rating.
Check the power switch:
With the power cord disconnected, press the power button on the front of the PC. The button should release easily and not stick in the socket.
If the button sticks, it should be replaced or serviced.
If the power button does not stick and appears to be functioning, continue using these steps.
With the power cord disconnected, remove the case or side panel.
Follow the wires from the power button on the front of the computer to their connection on the motherboard.
Look at the power switch cables connected to the motherboard. If the cable has become disconnected, connect the power switch cable connector to the connector on the motherboard.
Figure 5: Power switch connector on Motherboard
Replace the side panel, plug in the power cord and test to see if the computer can turn on. If not, continue using these steps.