Question about Dell Dimension E520 PC Desktop

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When i shut down my pc it shuts down, but the psu stays on, i can turn it off by the button but not by the desktop, any ideas???

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Hi, "Sleep" mode or "standby" mode allows your computer to go on standby or sleep until you "wake" it up again. This is a power saving feature which is usually used for a few hours. You can change it to completely shut down everything (including power supply) in power supply options in your control panel. Check out your help section for sleep or standby options. Hank

Posted on Aug 27, 2010

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Posted on Jan 02, 2017

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Hp P6000 fans stop after 15 seconds. Hard drive light stays on. nothing on monitor


dead PC, DESKTOP PC ,as old as 2009.
the fans tells you the PSU shut off, for cause.
fans, so you saw all fans turn off or just 1. or 2 of 3.
my pc has 4 fans many have 3;
CPU fan stops ,cpu overheats , PC goes slow or dead. clean the lint off it.
GPU fan , video goes dead. if it overheats.
PSU fan is inside the PSU if it goes bad, PSU is bad.
no monitor stated, is it CRT or LCD is it 15 years old.
if the monitor is 2002 or newer the OSD screen works
even with PC turned off, press the select button see that OSD screen ? telling you the monitor is not dead in 1second flat;
i caN NOT understand why the HDD lamp glows,
if the PSU shuts off , most LEDs go dead, on my PC
the standby LED on the MOBO glows, unless you pull the PSU power cord.
your HP PC came with 9 different mobo, during its production run.
at least. so answers come harder from that reason.

here are some simple tests.
test 1
power on, hear fans run
does the DVD drive (or cd) button eject work,.?
do all fans not just 1 or 2 worK? look for all fans clean the lent out
or things will overheat,
PSU can be bench tested or in the PC case.
using a jumper wire, even the HP service manual covers that.

power on the PC (after keeping monitor on for 5 full minutes)
test 2
the Screen must say, "hit ESC key to enter HP setup" BIOS.
press the ESC key on the monitor
if no text shows up that is a dead PC< "text above missing{"
if the PC told you to hit another key do so.
The ESC key , activates the BIOS brain. this cause
all those pages to work as seen in your service manual;.
if BIOS is dead that is a bad PSU (monitor ok)
or CPU is overheated.
bad ram, take all sticks out and test 1 by 1, ask how. !
The PSU will shut down on up to 12 or more faults
but never shuts down the standby power bus. unless AC line pulled.
IF the PSU has fan as most do this is the first place I look.



try this guide
https://support.hp.com/us-en/document/bph06788

Jul 08, 2017 | HP Computers & Internet

2 Answers

My computer was downloading windows updates overnight and froze. Tried turning it off from the power button, but did not work so I unplugged the computer. Few hours later I plugged the computer back in and...


You will have to get your power button unstuck. I do not know what type of button you have but if you would like to at least get your PC on without it instantly turning off, you can remove the power switch connector from the motherboard. You will eventually need to have the switch unstuck, or replaced though.

Oct 13, 2013 | Dell Dimension C521 PC Desktop

1 Answer

Computer wont turn on


Is the fan running in the power supply ?
Unplug all the drive power leads and try it.
If it still shuts down, try another PSU, by just plugging it onto the mother board only. If it still shuts down, I suggest it is a motherboard fault. The motherboard turns on the PSU, when you press the on button, it shorts 2 pins on the motherboard to start the power.

Mar 27, 2013 | Computers & Internet

1 Answer

Green light on my power supply stays lit after unplugging


Usually the light will time out after the capacitor has drained. Your machine is getting a bit old , your PSU may be the problem. If you plug it in and push the on/off button and it blinks, fans spin and shuts down, it's most likely the PSU. Look for a in-line fuse on the Motherboard, if blown, replace. Look at the motherboard closely for damaged components, capacitors, etc.

Jan 27, 2013 | HP Pavilion A820n (PP165AA) PC Desktop

1 Answer

My immediate 2426keeps rebooting but does not come on


Does it turn on for a few seconds and shut down? That sounds like a PSU failure. Try reseating the Memory mods, or remove 1 then the other, swap. Replace the CMOS battery. When you push the on/off button, it stays powered up? But does not boot? HDD spins? LED's blink?

Dec 25, 2012 | Packard Bell iMedia 6826 (P481000502) PC...

1 Answer

After shutting down the Vostro 200 slim tower the power button turns from blue to amber and stays that way. I have to push the power button down for a few seconds to fully shut down. any idea why it does...


IT IS SLEEP MODE AND YOU HAVENT SET ANY DEVICES TO WAKE IT UP.JUST FIGURE OUT HOWE TO SET DEVICES TO WAKE FROM SLEEP OR CHANGE SLEEP TO ANOTHER SETTING .JUST GOOGLE IT AND YOU WILL FIND THE ANSWER YOU ARE LOOKING FOR.

Jun 27, 2012 | Dell Vostro 200 Desktop Computer

1 Answer

I have a Compaq Presario SR1830NX desktop, I leave it on all the time, when I got up this morning, it was off, so I pressed the power button, but it doesn't power on, nothing happens.. I checked the power...


step 2 the TECH uses a voltmeter and checks all wires on PSU for correct voltage.

PSU in Desktop dead, my guess fans dead too right>
you never said, what it does inside PC ,except nothing
does nothing mean dead silence?
the fan must run for 1second, then goes off.
a 1 second run tells me the PC power switch told the MOBO to turn on and in turn it tells the PSU to turn on,
the PSU then turns on for at least 1second,and if the voltages are ok
then the PSU stays on, else off goes.

15 and 16?
the 20 pin older supplies those are both ground
but 24 pin ATX pins are correct there.
the voltages are here.
https://en.wikipedia.org/wiki/ATX


There are 2 causes, of dead power button.
1: the buttons 2 wire cable ends fell off. at button or PC mobo.
2: The PSU is bad.
3: the MOBO is bad.

The mobo can also shut off any PSU, if the PSU fails
or it sees the regulators in the MOBO fail.
the Desktop runs on many power rails.
some in the PSU, others on the MOBO.
THe mobo creates special low voltage for the CPU.

the power good pin, does that #8,
One way to see if the MOBO is overload
is to remove things from it, I start at RAM
lacking a voltmeter, this is very hard to fix any thing electric.
only guessing or pulling objects PC can find shorts.
pull all power cables there, hdd, power, cdrom.
all things that use red/yellow wires.
all SATA cables, all USB , then ram. even a fan can short
a good tech keeps an open mind, and finds why the PSU shut down.
in most cases, the PSU is bad. but not always.

This is a feature, of ATX it keeps you from blowing up say a
$300 microprocessor.... or fancy gaming Video card (have one)?
yes, pull the video card too.

Jun 25, 2017 | HP Compaq Presario SR1630NX PC Desktop

1 Answer

Once tv is turned on it stays on for about 2 min and shuts off. first the picture and the sound is still going then seconds later it shuts off and the lamp button blinks??/


Sounds like you have a problem that shuts down the Power Supply Unit, PSU, OR indeed more likely a faulty PSU.
In any event it is time for the repairman.

Jan 18, 2010 | Televison & Video

1 Answer

Emachine t5026 not power on. replaced psu.


I would test the memory. Also I think some computers will shut down if the fan on top of the CPU quits working. Or maybe one of the other fans or the Hard Drive quit and is drawing too much juice causing the PSU to shut down. It sounds like something may be grounding.

Jan 02, 2009 | E-Machines T2642 PC Desktop

2 Answers

Fans won't start on my compaq evo


I suggest replacing the fans with new fans. Fans do expire and they need to be replaced.

Aug 30, 2017 | Compaq Evo D300s PC Desktop

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