I plug in my hp pavilion desktop and the power light comes on. but there is no power. when i hold the power button down to turn it off it does not do anything. the light just stays on with no power. thanks if you can help
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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.
To wake it up,first try just quickly pressing the power switch on front. If worse comes to worse,just turn it off by holding the power button in until the pc shuts down & simply power it back on. Then you'll be able to get into windows & make the proper adjustments for the power settings you want & be able to configure the keyboard to put the pc to sleep or wake it. The above link is straight from hp,reguarding the same issue. I gave it to you for reference.
hmmm strange first thing id try is resetting the bios it seems it has been effected . remove case remove battery leave off for 3 minutes and replace try then again, while u have the battery out hold the power button on , oh and make sure the power is plugged out, and yeap hold power button for 3 secounds just to drain last of power from power supply. hope this helps
sounds like it is in standby mode..........try pressing and holding the power button until it turns off fully. then remove the power cable to reset the power supply, wait for 5 mins then plug in and try again,
it is also possible that you have a fault , possibly a failed power supply, it might be best to investigate that if the power reset doesn't work