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I have a Gateway GT5662. Fans run but no power light. Is this a power supply or motherboard problem?

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If the hard drive is spinning, most likely it is a motherboard board problem.

Posted on Oct 13, 2010


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Gt5662 compatible power supply

The gateway GT5662 uses standard power supply, any power supply should work, just make sure you have the same or higher watt value.

Jun 05, 2014 | Gateway GT5662 Desktop PC

1 Answer

Gateway computer power light flashes before booting up.

Hmm. I wouldn't have thought it had anything to do with pressing the button. It sounds more like a failing power supply or lack of current for startup. Did you make sure you plugged the power into the video card power connector (if it has one)? I know it worked ok at first but a heavier load can cause older or under-rated power supplies to fail soon after. Just a thought.

Dec 16, 2013 | Gateway GT5662 Desktop PC

1 Answer

I need what positions to plug in the PWR & PWR Led on my gateway mother board. It's a GT5662

Hello download the user guide here:

Or here:

The files from these sites needs to be unziped and you need adobe reader to read the content.

The front panel connector look like this:


Hope this will help you

Dec 12, 2012 | Gateway MCP61PM-GM (4006254R) Motherboard

1 Answer

Black screen no cursor no keyboard use

When you powered on the machine did you hear any beeps, hear the fan running, the disk drive running, lights blinking, hear the cd drive click, see the light on the cd drive door for a second or two when it clicks? If these things are happening you are getting power. If not, your problem might be with your power supply, hard drive or motherboard. Remove the power cord, then press and hold the power button for 30 seconds, then plug it back in and press the power button. if it boots you had a static charge. If you get nothing at all but a silent system your power supply is bad. If it sounds like your computer is running but you can't see anything on the screen you might have a problem with your screen or video card. If you have another monitor try using it and see what happens. if it works so you can see things then your monitor was bad. If it does not work with another monitor but you still hear fans, and see lights and hear the disk drive spinning, then your video card is probably bad.

Mar 17, 2012 | Gateway Computers & Internet

1 Answer

I have a Gateway GT5662 desktop and when I turn the computer on only the fans come on. I have replaced the power supply and the computer still will not boot up. Could it be a problem with the...

This could be caused by a number of different problems. The power supply would have been my first guess. But it could also be a problem with the motherboard. In fact, a bad power supply could often cause damage to the motherboard.
Other possible causes could be a bad memory module, damaged CPU, or even having the hard drives not properly plugged in.
The easiest thing to try would be taking out your memory modules one by one and trying to start the computer. And then double-checking the hard drive connections. Other than that, it will become hard to diagnose the problem unless you have spare components you can swap out. It might be best to take it in to a shop where they can test the components, unless it's under warranty. In that case, you'd do better to deal with the manufacturer.
Also, when you work inside your computer, be sure to protect it from static discharge. The best way is to wear an antistatic wrist strap. You can get them for just a few dollars.
Hope this helps!

Feb 25, 2011 | Gateway GT5662 Desktop PC

1 Answer

Power light on power supply is on, but won't turn on when you push the power button on the front of the computer. No fans run nothing.

Bad Power On switch. (Located inside the plastic Power On button), or Bad Power Supply. Weak voltage power rail.

Bypass the Power On switch to see if the switch is the problem, or the Power Supply.

To perform this procedure you will be using a jumper wire to touch the Soft Power On wire's terminal contact, (PS_ON. Green wire), to ANY Ground wire's terminal contact, (Black), in your 24-pin ATX main power cable's connector. Brief contact, no more than 2 seconds.

Main power cable remains plugged in. The jumper wire can be a paper clip straightened out, then bent into a U-shape. The bend of the U is wrapped with electrical tape.

The legs of the U go down into the socket holes of the Green wire, and ANY Black wire. (ALL Black wires going down in that connector are Ground wires)

You have to make sure the jumper wire touches a metal terminal contact, that is down at the bottom of the wire.
The jumper wire is slid down next to the wire, in the socket hole.

The voltage is 5 Volts DC.
Two D cell flashlight batteries produce 3 Volts DC.



Sep 30, 2010 | Gateway GT5662 Desktop PC

2 Answers

I have a gateway gt5662 given to me from a friend who was going to trash it. Got it home and plugged it up and the started on its own. No lights are on the MoBo. and the and some of the fans work and...

If it was the CPU it should still give you some sort of beep or diagnostic code.
On the back of the power supply there is some times a little light, when you power up if there is an issue with the power supply it will blink or change colors. Some times the power supply testers will light up green but there still can be issues and you need to use a voltage meter to do a more advanced test.
Have you tried removing any extra hardware and then trying the boot?

Apr 13, 2010 | Gateway GT5662 Desktop PC

1 Answer

I press the power button on the front and no fans run

Sounds like your power supply is not supplying 12v to the system. Check all your power connectors are seated properly on your motherboard, if so then i'm afraid you need a new power supply.

Mar 26, 2010 | Gateway 500GR PC Desktop

3 Answers

Hello, I have a Gateway model GT5662, stock setup - Will not boot

Usually, if it's a motherboard that has a failed component on it, you will see failed Electrolytic Capacitors. The small aluminum 'Cans' on the motherboard.

The Electrolytic Capacitors that surround the Processor, should have special attention payed to them. These capacitors are Voltage Regulators for the Processor. If even One is bad, the Processor won't receive the correct amount of voltage, and won't turn on.

Most of the time Electrolytic Capacitors will show visual signs of failure.
There are rare occasions that they do not.
In this case the Electrolytic Paste has dried up in the capacitor, and no outside visual signs will be shown.

I realize that it may look like I'm typing a foreign language here.
This is more information about Visual Signs of Capacitor Failure,

The Gateway GT5662 Desktop PC uses an ECS MCP61PM-GM motherboard.
As you can see in the photo below, it does use Electrolytic Capacitors, and not solid capacitors,

ECS motherboards are not reliable, and known for capacitor issues.


I believe your problem directly stems from a bad power supply.
Power supply has a Weak Voltage Power Rail.

Reasoning for this diagnoses?
Computer tech who has seen this problem at my shop over the years, occur more times than you can shake a stick at.

Would rate it at 70 percent of the reason for computer failure.
It is also rated at that percentage all over the internet.

The diagnoses you stated is correct for this type of problem.

Weak voltage power rail:

Your Gateway GT5662 can come with one of three power supply's.
1) Bestec - Part Number - 6506056R300 - 300 Watt
2) HiPro - P/N - 6506055R300 - 300 Watt
3) Delta - P/N - 6506054R300 - 300 Watt
(P/N's are Gateway numbers)

These are cheap generic power supply's. They have cheap components inside.
Cheap Electrolytic Capacitors,
Gauge of wiring is too small,
Rectifier Bridge is of low quality,
and the list goes on.
When you pick your power supply up, you can feel how light it is in weight.
You can literally feel the difference in weight, when you pick up a decent power supply in comparison.

These power supply's have three main voltage rails. (Very common)
1) The 3.3 Volt power rail
2) The 5 Volt power rail
3) The 12 Volt power rail

The Electrolytic Capacitors used inside the PSU, (Power Supply Unit), are used in the Input stage, and the Output stage.

Used for the incoming 120 volts AC from your house, in the Input stage.
Used for the outgoing DC Volts that have been converted, inside the power supply in the Output stage.

[A computer power supply converts AC electricity, into DC electricity for the computer.
3.3 Volts, 5 Volts, and 12 Volts are DC.
Alternating Current and Direct Current. A flashlight battery is an example of stored DC]

With a weak voltage rail there isn't enough power to turn on the processor.

1) ALL the lights use less than 1 Watt
2) EACH fan uses 2 to 3 Watts
3) A typical Processor uses 55 to 125 WATTS.

This is why the Power On light comes on, the fans spin a few times, but no Operating System comes up.
(Windows XP is an example of an operating system)

No video signal from the computer, you get a No Signal on your monitor. No video signal because the computer isn't working.

When you press the Power On button, you are making a temporary circuit to the power supply, through the motherboard.
You are making a circuit that delivers 5 volts to the power supply. Just for a few seconds. Soft Power On.
(That's why the Power On switch is spring loaded)

The power supply comes on, and the BIOS program is activated.
(From the BIOS chip on the motherboard)

BIOS checks to see what devices are installed, does a Ram Memory count, turns the Processor on, and hands the computer over to the Operating System.

You don't even have enough power to activate BIOS now.

Why does a power supply fail?
Usually two reasons, or a combination of both.

1) Computer is dirty inside, and so is the power supply.
Computers should be cleaned inside, ( And the power supply), on a regular basis with a can of compressed air for computers.
(Computer unplugged from power)

2) Cheap components used in a cheap quality power supply.

Replace the power supply, also insure that the computer is clean inside before doing so.

Do you have another power supply that is compatible, and is known to be good to use for a test?
(300 Watt ATX style with at least the same power cables)

Some of us have old computers around, that we can 'Borrow' one for a test, then put it back.
This would prove my diagnoses to be correct, and you will know what to buy.


This is NOT an invite to open your power supply.
The Electrolytic Capacitors used inside can hold a charge for Weeks, sometimes Months!
If your fingers touch the wrong spot, (Terminals on capacitor, or circuit one, or more are in), YOU could receive the charge!

Shock is Bad to Fatal!

Jan 07, 2010 | Gateway GT5662 Desktop PC

1 Answer

When I start my computer it says no input signal and I do not get a picture I can hear the tower running and the power light on my screen is on how can I fix this it is a gateway model GT5662

Your video cable is (1) disconnected (2) faulty or you have selected some other mode other than what has been set in the BIOS.

The message if from your monitor

Check it out.

Sep 27, 2009 | Gateway GT5662 Desktop PC

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