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Desktop will not boot; both fans start eventually, but not will consitent speed; they slow down and speed up as if not getting enough power. the mother board has a red light flashing at the same Rhythm the fans slow down and speed up; could it be a defective power supply, not sending enough power to the mother board?

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Most likely your guess is correct and if a beep sound is not availabe (Power good signal) than its 100% power supply problem.

Posted on Apr 28, 2008

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My laptop won't start up normally. The fans and everything begin to turn and start when I press the power button, but within seconds, they start to slow down and eventually stop.


You did not post anything about make and model. This is kind of a guess.

My laptop has "battery saving" setting that operate the fan based on temperature. When I start up, the fan comes on and the computer checks itself, Then the fan slows down. Later when the laptop warms up, the fan speeds up. See if you have some power management scheme set that makes the fan run like this before you take it to the shop.

Your laptop should be under warranty.

May 09, 2015 | Computers & Internet

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How do I control fan speed?


Keeping the fans clean is especially important, because the fans blow out hot air and bring in fresh air to cool down the laptop.


Fans attract dust, however, which can slow them down, resulting in a hot laptop.

If the laptop overheats, vital parts can cease functioning altogether.


Consequently, keeping your laptop's fans clean is crucial.



The fan speed on a laptop can determine how it operates consistently and reliably.

You can slow it down or speed it up, based on the circumstances.


For instance, slowing down the fan speed may be useful in reserving processes or during a prolonged slow time.


Speeding it up is beneficial in keeping the laptop cool during ongoing use or high-traffic times. For the long term, find a happy medium for regular use, so you won't "psyche" out your computer by constantly adjusting the settings.


Click on the Start menu and select "Control Panel." Next, choose "Performance and Maintenance."


Select "Power Saver."


To slow the fan speed, locate the slider next to "CPU Processing Speed" and slide it down by moving across to the left.


To speed up the fan, move the slider to the right.


Press "Apply" and then "OK," if prompted.


Hope this helps


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1 Answer

Won't start but CPU fan vibrates but will not go full blast. Intermittant


It appears you have a faulty CPU fan and it is causing the CPU to overheat and shut down.
I suggest you replace the CPU fan. remove any dust from the heatsink and put new heatsink compound on the CPU/heatsink.

May 06, 2012 | Compaq Presario S5000NX PC Desktop

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Gateway gt4016 desktop, s/n gcm64 110 54982 unit will not boot up, pressing power button, fans starts, yellow light comes on, then shuts down. cleared cmos, pressed power button unit will boot up but...


the cpu could be over heating make sure its secure if you like get some thermal paste from your local pc world put a little on the top of the cpu under the cpu fan and replace fan securely might work be carefull....bonnell

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My gateway MA1 laptop running win xp has cooling problems


Contact GATEWAY, and get them to fix your laptop.
The fan is designed to run at "full-speed" when you first turn it on, and then there are temperature sensors that slow the fan down, to minimize noise, while the computer is "cool" enough that the fan does not need to run. The sensor is malfunctioning, and is not turning-on (or turning-up) the fan when the computer gets "warm".

Jul 17, 2010 | Gateway Computers & Internet

1 Answer

Gateway 831gm not booting. Fans come on but no boot process.


2 questions:
When you say new motherboard do you mean an actual new motherboard or new to that machine, but came from another used model?
When you say you tested the power supply do you mean with a voltmeter/ammeter or put it in another computer and it worked?
I worked on several gateways with similar problems and it boiled down to motherboard issues.
I tested it by replacing the power supply with a bigger (used) power supply and it worked great (for 1 time) and then put the other power supply back in to confirm my diagnosis and yep it wouldn't boot. The next morning I was going to run some virus/malware cleanup and installed the other (known good) power supply and it would not work. I tried all day to get it to boot and it did about twice in a 4 hour period. When it did run it would run great but any attempt to restart it would cause it to crash. No ryhme or reason, it would not fail the same way more than twice. Sometimes beeps, other times no beeps, sometimes it would start up with no video (could hear the Windows starting sounds) other times it would start up normal. I could let it sit and it would start or I could keep trying in sucession and it would eventually start. Some times the fans would slow down from a roar, sometimes they wouldn't. So with a known good power supply that had 150 more watts than the original I diagnosed it as a failed motherboard. But if you have put in a brand new motherboard then I would replace the power supply, because a bad power supply does not mean no power, just not enough power. Please post back and let us know what you find out.

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My DC5000 SFF turns on okay then switches off randomly Help!!


Which fan are you referring to? As far as I know the fan in the power supply runs at the same speed at all times. So if that is the fan you are hearing it may indicate that the power supply is failing. The power supply may be over heating and shutting down. I would try a different power supply if you can get your hands on one.

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Thinkcentre M55 8806 power on off problem


May be your computer motherboard wires connection get loose or getting moisture in wires. Or there may be some earthing problem in ur power switch. First, check the wires connection & tighten up properly. if problem persists, check the earthing by power tester. Check you RAM if it is properly tight in the jack.

Dec 26, 2008 | Computers & Internet

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