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Replaced power supply

Computer doesn't boot up but fan runs and Computer on-off switch has no effect.

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I had same problem,but mine was under warranty,sent it in and they replaced the motherboard.everything worked ok then

Posted on Dec 15, 2008

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No power to my desktop computer HP A1330N and no green light in the back of the power supply


You replaced power supply and your made sure you plugged everything back into the motherboard snuggly and in it's proper place? If so it might be your motherboard is bad.

Make sure you have the new power supply turned on. Sometimes there's a O/I switch on the back of the power supply. Flip it and try to boot and see what happens. You might have another bad power supply.
If so your motherboard might be burning them out.

Try removing the power cord for 30 seconds and press and hold the power button. After 30 seconds put the power cord back in and press the power button to see what happens.

Do your fans work when you press the power button? Do you hear any fans running?

Mar 23, 2012 | PC Desktops

1 Answer

My imedia b2217 will not boot. Is the motherboard dead? Whenever I switch on the computer nothing happens. No lights, no fans, nothing at all. I have replaced the power supply but still nothing


Hi i'm Basti,

How bout the fan for your power supply, is it running? Try to retrace the cables to motherboard and make sure its tight. Change or use another power supply if possible.


Keep me posted. Hope this helps.

Feb 25, 2011 | Packard Bell iMedia SL 9553 (P660401806)...

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

2 Answers

Compaq Presario SR2150NX doesn't turn on. Front panel green light turns on but nothing else happens (no fans, no boot, no noise, nothing) Please advice


On the back of the Power Supply there should be a Green LED, When you power it on if it is flashing, this means that the Power Supply is dead and you need to replace it.

Apr 14, 2010 | HP Compaq Presario SR2150NX PC Desktop

1 Answer

Gateway 5228 wont boot no lights on keyboard


does it load the bios screen? Does it get to the windows load screens if it does go to the bios screen? Does the computer power on at all?

Sometimes what happens is the bios chip can be faulty or die and this will have to be replaced to fix the issue. If the computer is not powering on then it is more than likely a power supply issue.

(just in case, you might want to make sure that all of the adapters that come from the power supply are connected to the motherboard as well)

Sep 30, 2009 | Gateway PC Desktops

3 Answers

CPU fan runs at high speed and won't boot


Change the setting in the BIOS menu. reboot your computer.. when you see the dell logo.. press F1 (or F2 if F1 doesn't work) button until you see the BIOS screen. Check for fan options and change it

Jun 20, 2009 | Dell OptiPlex GX520 PC Desktop

1 Answer

Ijust replaced the cpu fan and now the computer won't boot - it just flashes the gateway logo


make sure that the power reqs for the fan are the same as one you replaced and make sure that the new fan is the same prong (3 or 4). Also make absolutely sure you plugged the new fan power supply inti the CPU fan slot

Apr 15, 2009 | PC Desktops

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

My computer goes off suddenly.


replace your power supply then check

Nov 20, 2008 | PC Desktops

2 Answers

I just put together a new computer using ASUS Motherboard P5Q-E. When I turn it on to boot it up for the first time the Onboard Switches P5Q-E Power on switch and the P5Q-E Reset switch blink. The power...


Re seat your RAM and any other cards that plug into the Mother Board such as PCI cards then try starting the computer again. If that doesn't fix it, then you can uninstall devices and try to boot until you find the culprit, as those beeps you hear sound like hardware error beeps that can be caused by faulty hardware (even keyboards or mice) that plug into your computer. Eliminating all removable hardware should help you determine whether it's an add on component or if the Mother Board itself is bad.
Good luck

Sep 18, 2008 | ASUS PC Desktops

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