When i turn the system on it powers up then immediately turns off then seconds later it tries to turn itself back on but shows nothing on the monitor. Don't see anything wrong with the power supply, and have tried different monitors. I would appreciate some help.
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Re: my hp pavilion model a705w power wont stay on
First thing to try is to try another power supply.
If that does the same thing, then remove all cards and hard drives by unplugging the power to the drives. Leave the mother board plugged in along with the keyboard. Then see if you can start it to the bios screens. If you can get to that far, then try to reset all the settings to the default or fail safe. Next plug in any cards, restart the machine to see if gets as far as the start screen where the drive boots. If it does that, then you can plug in the hard drive and see if that gets it to boot. If it boots, then shut down, and plug in the other drives like the floppy, cdroms and so on. If it boots, fine.
By doing this you are checking each item to see what happens by trial and error so to speak. If the boot fails after one of the items are plugged in, check that item.
Using a trial and error step by step can save many hours, and dollars as well. When you are through, you may have found the problem.. hope it works. take care,
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On the back of the power supply there is a 120/220 V AC selector switch.
It's possible that switch got knock on the wrong voltage position.
Pull the power cable.
Move the switch back and forth between the two position.
Make sure you leave the switch in the correct selection.
120v = USA
If you have time,open the case and inspect the RAM module(s) and card(s). They can be un-sitted.
plug in power cord and power on the pc.
if you have installed a new hardware, that might be the cause. specially if it is a video card. The wattage of your power supply might not be enough to run the computer. try to remove newly installed hardware such as video card. If there is none, you may try to remove the power for the hard drive and the dvd drive and check if it will turn on. Just bood in to bios..
if that works, then it definitely is the power supply. it cant provide sufficient power to your equipment..
obtain the driver from cd/dvd that was included as you purchased your desktop and try to check if the driver supports with the operating system you are using now. for example the driver available in your cd/dvd is only for windows xp and your operating system you are using now is windows vista of course driver not installed. try to download from internet the driver that are suite to your unit model and current operating system this can fixed your problem or else downgrade your os tha can support the driver that are available from your cd/dvd.
That's because it has a failing power supply. I post this a lot. Why? Because 70% or more of computer failure, is directly related to the power supply. Next up is Electrolytic Capacitor failure on the motherboard, (The 'Caps' that surround the processor, more specifically. These are Voltage Regulators for the processor)
Then harddrive failure.
Many times you'll see a solution posted to use a Restoration disk, or System Restore. This is just a 'Band-Aid' approach. The power supply, for you, is the problem.