Tip & How-To about Computers & Internet

How to disable LED light in a CPU fan

Some desktop computer towers, also known as a processor with decorative LED lights on the fan. LED means light emitting diodes. This is a small, lightweight, durable savings of energy that goes into a variety of colors. It connects to a device with two metal terminals of the connector is similar to a power cord. This can affect a beautiful, but can also be irritating. If the computer in your bedroom at night, these lights can affect your sleep, so it's important to know how to turn off the LEDs on the fan.


1. Remove the computer side. Tighten the screws on the side of the CPU. Slide the face up and away from the side of the CPU. This ensures that the fan and the LED lights on the computer.


2. Pull the LED on the bottom and away from the fan with a plier. Hold the head with an LED light pressure and drag it to yourself. It is easily accessible from the release of the fan, because it only comes with two small clips.


3. Flip the CPU. Slide the side in the slots on the CPU. And tighten all the screws through the holes on the side of the CPU, making it in a clockwise direction.

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Red hard drive light and fan continuously running


Let's diagnose from your statements;

A) No display on monitor

B) Harddrive activity LED is on

C) Fan keeps running. Assume your reference is to the computer case fan. IMHO if it was a reference to the Processor fan, you would have stated so.

D) Power Supply changed. Assumption is that it is KNOWN to be good......

A1) Following a diagnostic flowchart, you would rule out the possibilities of a problem, one by one, and step by step.

No display on the monitor can mean a lot of things, however with the additional information we can narrow it down further....

B1) The Harddrive activity LED is on. The way you made the statement, makes me think you are referring to it is CONSTANTLY on.

Reason?
Harddrive is in an endless loop. BIOS is trying to find the Boot record on the Harddrive.
However for some reason it isn't finding it.

C1) Fan keeps running....
This leads me more to believe the reference is now, to the Processor Fan.
Processor fan running at high speed.

D1) When someone states they 'Changed' the Power Supply, instead of Replaced the Power Supply, this leads me to believe the reference is to another Power Supply that was laying around, and not a new Power Supply.

Therefore makes me want to ask;
"How do you know the Power Supply is indeed good?
All 3 main voltage power rails are good?
3.3 Volt, 5 Volt, and 12 Volt? (DC)"

A Power Supply with a weak voltage power rail, will show the symptoms you are seeing.
Why?

1) If ALL of the LED's (Light Emitting Diode) were on at once, they would use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts of power.

3) A typical Processor can use 51 to 130 Watts of power.
Just depends on what Processor it is.

No Processor running, no 'Brain'
No 'Brain' running, no computer.

You press the Power On button. This plastic assembly then presses against a Power On switch, located inside it.

The Soft Power On circuit is activated. This 'excites' the Power Supply, and turns it on.
The first chipset to receive power is the BIOS chipset.
The Basic Input/Output System program is initialized.

BIOS looks to see what devices are connected, does a Ram Memory count, TURNS THE PROCESSOR ON, and hands the computer over to the Operating System.
(In this case the O/S is some version of Windows)

Processor is NOT turning on. No 'brain' operating to find the Boot record on the Harddrive.
Harddrive spins in an endless loop.

Power Supply is KNOWN to be good? Came out of a working computer?
Power Supply is a new one?
Still doesn't mean it is good. Test the 3 main voltage power rails, with a multimeter.

Assuming the Power Supply IS indeed good......

Clean out the inside of the computer.
Replace the Thermal Paste on the Processor (CPU)
Make SURE you are following Anti-Static Procedures.
[The CPU (Processor) is the MOST susceptible hardware component to Static shock ]

However, after replacing the Thermal Paste, do not plug the Power Supply into power.

Press the Power On button in, and hold in for a count of 10 seconds.
Let go.
Do this procedure 2 more times.
What you are doing is clearing CMOS Error Codes, and resetting BIOS Setup back to the factory default settings.
The former matters, not the latter. Just telling you the 'whole story'.

NOW plug the Power Supply into power. WAIT 1 minute, turn the computer on.

Post back in a Comment with the results. Or click on Reply at end of solution, and post results.

Need guidance in replacing the Thermal Paste on the Processor (CPU)?
Post the computer manufacturer name, and model number.
The Model Number can be found on the Back of the computer, or up on the side of the computer tower.

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3071621&CatId=503

http://www.hardwaresecrets.com/article/274

Regards,
joecoolvette

May 14, 2013 | Computers & Internet

1 Answer

HP Pavilion Media Center m8200n upon turning on it only beeps, and led light blinks twice contiuously, with no signal to monitor?


Power On LED Carl?

I ask that because most Power Supply's that HP uses, have an LED on the back also.
(HiPro, Delta, and Bestec)

The LED is now working as a diagnostic LED.
(Light Emitting Diode, so stating LED light, is redundant)

The beeps you hear are BIOS Beep Codes.
The computer's way of telling you something is wrong, and an area to look into for it.

As stated, it's a Code.
One example;
3 Short beeps,...pause, 3 Short beeps,...pause, etc.

With the Power On LED blinking 2 times, then a pause; indicates,

A) Computer is dirty inside. To include Power Supply

Computer is unplugged from power, Anti-Static Procedures are FOLLOWED; and a can or two of compressed air for computers, is used to clean it out.

I have a procedure to follow if you are interested.

B) Processor (CPU) fan is not seated correctly, and/or is Not functioning, or functioning properly.

Case open, and computer on; see if the Processor fan is;
1) Spinning

2) Looks to be spinning the proper speed.

No, I don't expect you to count the Revolutions per Minute, lol!
My reference is a general one. If the Processor fan looks to be turning slowly, you'll know it

3) Processor fan spins intermittently. Spin, slow down, stop....spin, etc.

C) Thermal Paste in-between Processor, and the finned Heatsink that sits on it, has dried up.
Lost it's thermal conductivity properties.

Top of Processor, and Bottom of Heatsink; MUST be THOROUGHLY cleaned, and fresh, new Thermal Paste applied.

I have a procedure for this too.

I can guide you step by step.

Post back in a Comment.

Regards,
joecoolvette

http://h10025.www1.hp.com/ewfrf/wc/product?cc=us&lc=en&dlc=en&product=3548185

How to > Adding/Replacing Hardware > Opening the PC Case,

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00583783&tmp_task=useCategory&cc=us&dlc=en&lc=en&product=3548185

http://www.hardwaresecrets.com/article/274

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3071621&CatId=503

Apr 03, 2013 | Computers & Internet

1 Answer

Gateway a computer desktop has power but nothing on screen the computer doesn't have a tower


1) Computer doesn't have a tower? Means it is a 'pancake style' of desktop computer. A flat model.

2) No signal on monitor screen?
Good.
At least we know the monitor is good.

Problem is monitor cable, IF separate cable; or computer.

Computer isn't sending a video signal.
No Signal, Power Saver Mode, etc.

If an older CRT type monitor, (Looks like a small TV), and monitor cable is not detachable; use a known to be working monitor, and monitor cable.

If a separate monitor cable, use a monitor cable from a working computer, for a temporary test unit.
Put it back when deemed monitor cable is the problem.

Logic at this point, would deem something is wrong with the graphics chipset.
Whether mounted directly to motherboard, (Integrated), or a separate graphics adapter card. (Graphics/Video Card)

However, computer could be dirty inside, or have a bad Power Supply.

LED's (lights) light up? Maybe fans spin?
Means nothing.

1) If ALL of the Light Emitting Diodes were on at once, they would use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts of power.

3) A typical Processor can use from 51 to 130 Watts of power.
Just depends on what Processor it is.

Older desktop computer?
Ummm, 35 to 40 Watts.

That is why LED's can light, and maybe fans spin, but no computer.
NOT enough power to turn the Processor on.

Computer needs to be CLEAN on the inside. Inside of Power Supply too, as well as possible.

Proper method to do this procedure, post back in Comment if you need guidance.

Also remove ALL Ram Memory modules, and clean gold plated contact pins on bottom; with pencil eraser.
Reinstall. Make SURE they are seated in tight, and Lock 'ears' are locked in place.

Post in a Comment, as to the model number.
Example, DX4300-05. Should be on back of computer.

Regards,
joecoolvette

Mar 22, 2013 | Gateway Computers & Internet

1 Answer

pisplay not shown


Display not shown?

1) Does the monitor show No Signal?
If so go on.

If not;

Use another known to be good monitor, and monitor cable, on your desktop computer. Be aware that the problem may be the monitor cable.

Or use your monitor cable, and monitor, on another KNOWN to be working computer.
The monitor isn't receiving a Video Signal. Means the signal is not reaching the monitor. Could just be a bad monitor cable.

2) If the monitor is good, and the monitor cable is good, the problem is the computer itself. The computer isn't working.

You may see LED lights light up, hear fans running, and maybe even the Harddrive spinning.

Problem could be the Power Supply.

A) IF, all of the LED lights were on at once, they would use less than 1 Watt of power.

B) EACH fan only uses 2 to 3 Watts of power.

C) A typical Processor can use 51 to 125 Watts of power. Just depends on what Processor it is.
(Older Intel Pentium III processors, and AMD Athlon processors, use less power than 51 Watts)

Not enough power? BIOS will not turn the Processor on.

Solution is to test the Power Supply's 3 main voltage power rails, or use another KNOWN to be good, COMPATIBLE power supply, for a test unit.

The 3 main voltage power rails are;

A) 3.3 Volt power rail

B) 5 Volt power rail

C) 12 Volt power rail

Test is done with an economical Multimeter, set to DC Voltage.

Post the model number of the IBM Netvista desktop computer. You will find it on the back of the computer, next to the Windows product key,
(XXXXX-XXXXX-XXXXX-XXXXX-XXXXX), or up on the side of the computer tower.

Post in a Comment.

Regards,
joecoolvette

May 20, 2012 | IBM NetVista PC Desktop

1 Answer

fan not lightning up


there should be 3/4 small led (light emitting diodes) on the inner of the fan check the integrity of the solder on the wire to this led strip if there are any breaks in this then it can be re soldered.

if the fan is part of the PSU (power supply uinit then consult your local pc repair shop do not open the PSU.

If its just a case fan it would prob be easyer just to replace the fan.

hope this helps

Nov 03, 2007 | RaidMax NINJA 918 ATX Case

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