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Pc will not boot. power is into the power switch as it lights up when pressed to turn on computer. with the case off the fan to the power supply and fan on the processor turn for approx 3 seconds then nothing else happens. no bios beep etc.

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  • 93 Answers

Check the pin assign ments on Mother board. verify that reset and power pin plugged properly,

or

*********** board circuit is touching to metal or a metal part of your cabinet.

or

clean the mother board with dry air blower so if somthing laid on mother it will be blown out.

Posted on Nov 17, 2008

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PCV R44G, won't boot, no fans, won' turn on.


Remove the Power Cord, Open the Case and remove one of thememory chips. Set the chip aside then try rebooting the computer. If it boots, then you know the memory chip you set aside is bad so mark an x onit with an ink pen. If it fails to boot then move the chip to the nextmemory slot and try rebooting. If it fails take the chip out and set itaside, then put the other chip in and try booting it in both slots. If itboots, just to verify that the chip set aside is bad, mark an x on it and putit into the open memory chip slot and try booting.

Apr 22, 2012 | Sony Computers & Internet

1 Answer

How do you do a cold boot on a dell desk top model Inspiron 530? The computer will not boot up


Hmmm....you press the power button on the front of the case. I am not sure what you need exactly. If the computer has had a different power supply installed there could also be a power switch on the back of the case.

If everything is plugged in correctly and you don't hear fans or hard drive sounds, you most likely need a new power supply.

Jan 18, 2011 | Dell Dimension 5100 (D51L1) PC Desktop

2 Answers

When the computer on/off button is pressed , the CPU fan and tower exhaust fans start running, the blue light around the power button does not light and the boot up process goes no further. Fans continue...


A) When you hold a Power On button, (Switch actually), in for a count of 10 seconds, it turns the computer off.

(There is a Power On switch, located behind the plastic Power On button. Usually, the Power On switch snaps into the housing of the plastic Power On button.

Example of a typical ATX Power On switch,

http://www.directron.com/atxswitch.html

The Power On switch turns the Power Supply on.

Old computers had a metal rod, that when the Power On button was depressed, the button pushed against the metal rod, which in turn pressed against a power switch located inside the Power Supply.

The design after that, was a power switch located in the Front Panel. (Plastic front of the computer) A large cable, (Wire) ran from the switch to the Power Supply.

Now there is the Soft Power On feature. (PS_ON)

The Power On switch is a small Momentary Contact Switch. Pressing it closes a circuit. The Soft Power On circuit.

When a power supply is plugged into power, there is a constant 5 Volts (DC) present.
This is the 5 Volt Standby.

Closing the Soft Power On circuit, redirects the 5 Volt Standby power to a circuit within the Power Supply.
This in turn 'excites' the Power Supply, and turns the Power Supply on.

Sorry to be windy, but I wanted you to know how the Soft Power On feature works )

eMachines are a budget computer. As such they save the consumer money.
However in order to do this, the manufacturer will install low quality parts, in some areas of the computer.

One such part is the Power Supply.

1) ALL the LED lights combined use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts

3) A typical Processor can use 51 to 125 Watts.
Depends on what Processor it is.
(Had you stated the Model Number I could have told you)

Enough power to spin fans, but not enough to spin fans, AND turn the Processor on.

Do you have access to another computer that is unused, but has a Known to be good, Compatible power supply?
It could be used for a test unit.

Tell me the Series, and Model Number of your eMachines, and I'll tell you what Wattage it should have, and what power cables, for the Power Supply.

(Some examples of Series, and Model Numbers, T1090, E4264, W2925, and so on. The T, E, and W are a few examples of the Series letter.
The numbers following the Series letter, is the Model Number)

If you wish I can direct you in removing the Power Supply, and installing the test unit. (And/Or a new Power Supply)

Sep 12, 2010 | E-Machines eMachines Desktop PC

3 Answers

Pc will not come on no power , have checked power outlet, as well as power cable, to no avail ...........still will not come on


Have you checked the toggle switch on the back of the power supply? Make sure it is turned to the correct voltage (110 in the US). Still no power? Check the connection on the motherboard. Make sure the power supply lead from the front panel switch to the motherboard is connected. Then check all power connections to the motherboard. Secure or correct as needed. (follow the motherboard manual's diagram as to where each lead should go)

Jan 01, 2010 | E-Machines eMachines Desktop PC

1 Answer

PC will not power up. No fans, lights, anything.


Have you tried a different power cord? (longshot, I know, but it is one of the variables that you don't mention)

Have you tried a different A/C outlet?

Dec 22, 2009 | Computers & Internet

2 Answers

PC won't power on. Compaq SR5410F


IF you have another power supply you can use, try it and see if the computer will power up.

Oct 29, 2009 | HP Compaq Motherboard

2 Answers

No boot, New PS, Green light on MB lights, No Fans running


Bottom line: Either your power supply or (hopefully not) the mother board has gone bad.
Replace power supply (remove old one), take to local independent computer shop, ask them for new unit. Should be around $50.00. - no more. After reinstall, if still no fans, boot, etc. Replace motherboard or buy a new machine. MB's installed probably will run you around $250.00-ish.
Good luck.

gurutim

Mar 21, 2009 | E-Machines eMachines Desktop PC

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...

1 Answer

Computer truns on but will not boot up


You need to do some research here, Take the cover off before you try to start it, but keep your hands out. No turn it on, Do the fans spin, there should be at least 3. The first is usually in the center of the machine on the circuit board. It is about the diameter of a coffee cup, this is the cpu fan. The second should be on the back of the case (inside), this is the case fan and the third is in the power supply. The one in the power supply is visible from the back of the case. All 3 fans should be spinning, are they?

If all the fans spin, next check to see if you can hear the hard drive power up and start to spin.

I have a feeling your power supply is dead, but to diagnose, we need more info.
b

Dec 13, 2008 | Dell Dimension 2400 PC Desktop

1 Answer

Could a faulty fan cause my pc not to switch on


Normally the computer will still come on even if the fan is not there but then will sometime display cpu fan warning and then sometimes turn off depending on motherboard and so on but unless the fan wires are shorted out or something this is most likely not the case

It sounds like your power supply has gone bad
Do you hear any type of winning sound or like a discharge sound that is barely noticeable when you turn it on? You would probably almost have to put your ear right next to it to hear it or listen carefully when you press power because that sound is one of the capacitors in the power supply that has gone bad and the power supply would need to be replaced

Do you have another power supply you can use to see if it works with a different one?

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