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I bought a new case fan to replace an HP Compaq DC5100 Case Fan. The problem is the fan I bought has a 4-pin molex connector which I didn't find in my computer. Is there a converter from the 4-pi

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  • 247 Answers

You will find 3-pin to Molex only as the 4th pin is for control which older Molex does not support. You bought the wrong model fan for your motherboard. You might consider rewiring it with the old connector. See e.g. http://www.silentpcreview.com/article1193-page7.html which provides wiring logic.

Posted on Jan 09, 2013

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: connecting front panel leads of generic case to 4600 motherboard

b9bfa92.jpg



-MrSlickShoes

Posted on Mar 20, 2009

  • 1 Answer

SOURCE: 920-fan command 2 pin connector not connected

It is a 2 lead wire (red/white and black) that connect right next to the memory slot. you have to connect the red/white wire to the 5v+ side of the 4 pin peripheral and the black lead to the com (black) on the same 4 pin peripheral. i can't really think of any way better to explain at the moment. but any questions. email @ forwardyourletter@gmail.com

Posted on Apr 28, 2009

mukexh
  • 20 Answers

SOURCE: need front panel connection diagram power switch lrf connectipns on 9 pin connector on motherboard

Hi u can easily solve this problem.
open your computer cover and and see the motherboard front panel connectors. a use of screw driver touch any two front panel connectors if any led or switch working this condition you can note this and connect successfully. one by one touch all penal connections and u will be solve ur problem thanks mukesh kumar
mukesh_ibm@yahoo.com

Posted on May 13, 2009

  • 10406 Answers

SOURCE: Lenovo J115 with new Gigabye motherboard - case fan set up

Lenovo's web-site: http://www-307.ibm.com/pc/support/site.wss/homeLenovo.do
should have the information.

What connectors are leading from the front-panel?
One "clump" of wires and one connector, or several separate connectors?

Posted on May 27, 2009

  • 69 Answers

SOURCE: 920-fan command 2 pin connector from power supply not connected

then connect the fan to a 2-pin connecter if you cant do it take it to a computer place to do it for you

Posted on Sep 24, 2009

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2 Answers

Computer shuts off after 2 mins when case side panel is on


Might be faulty PSU power supply unit
it sounds like a loose connection of some type check the power button connections make sure the soldered wire connections are good and dust free

check cmos battery seating some motherboards cmos batteries are soldered in

it could be a loose or faulty power or data lead check these from motherboard to hard drive also make sure the CPU cental processing unit has a secure dust free seating an has thermal paste

it does sound odd
hope this helps

Jul 04, 2012 | Computers & Internet

2 Answers

What size case fan for HP Compaq dc7600?


What size case fan? Dunno.

1) How to measure the fan? Across the fan's shroud. (Surrounding Cage) Fan stood up, measure the Height, and Width.

2) Look at the label on the fan's center hub. Write the number down.
Now which of these CHASSIS fan numbers match?

http://www.sparepartswarehouse.com/HP-Compaq,Business-Desktop-dc7100-dc7600-dc7700,Computer,Fans.aspx

A) 3777791-001
Chassis Fan - 70mm x 70mm x 15mm.

70mm x 70mm is the height and width of the fan's shroud. (Surrounding cage) [ Chassis fan stood up ]

15mm is the Thickness of the fan shroud.

Nope, not that one.

B) 451144-001 Chassis Fan - 92mm x 25mm

Could be.

C) 455310-001 Chassis Fan - 92mm x 25mm.

Could be.

Regards,
joecoolvette

Jun 11, 2012 | HP Compaq dc7600 Small Form Factor PC...

1 Answer

511-cpu fan not detected


are you the one opening your desktop computer?

If you are, check your cpu-fan connector pin if its properly connected to the motherboard

If not

check if your cpu fan are working if it didn't rotate replace it with a new one

Jul 26, 2011 | Compaq (283983-001) Motherboard

1 Answer

Recently changed the power supply. There is no video output. Where can I download the motherboard schematic?


Right here at HP Support,

1) Motherboard Specifications:

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00361570&tmp_task=prodinfoCategory&cc=us&dlc=en&lang=en&lc=en&product=459491

Scroll the page down to the top view illustration, and photo.

A) The motherboard uses a 24-pin ATX main power cable.
In the illustration the connector on the motherboard is on the right side.
It is an empty rectangular box with ATX Power Connector in it.

On the motherboard photo it is the rectangular white connector with two rows of 10 socket holes, and is to the bottom right of ram memory slot 2.

Another example of a 24-pin ATX main power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

Ensure that the 24-pin ATX main power cable's connector, is locked into place on the motherboard's connector. The lock tab on the main power cable must be hooked over the tab on the motherboard connector. This ensures that the main power cable is in all the way.

B) The motherboard uses a 4-pin ATX +12 Volt power cable.
The connector on the motherboard is a white square connector, with 4 socket holes.

In the illustration it is to the bottom left corner of the Processor socket (LGA 775), and has ATX12V underneath it. This power cable's connector also has a lock tab.
Another example of a 4-pin ATX +12 Volt power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4

Power TO the motherboard, that's it.

Power FROM the motherboard:

C) System Fan, and CPU (Processor) Fan.

Abbreviated as SYS_FAN, and CPU_FAN to the bottom left of the ATX12V connector.
(4-pin ATX +12 Volt connector on the motherboard)

The System Fan is the computer case fan.
CPU Fan is the Processor fan.

D) The four SATA headers on the bottom right in the photo, (Blue, Orange, Black, and White), are for the SATA data cables.
They connect to a SATA harddrive, or SATA optical drive. (CD/DVD drive)
(They are an L shaped connector inside, with 7 pins inside)

Power for these SATA devices comes from the Power Supply.
The Power Supply has SATA power cables.
Example of an average SATA power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#sata

(L shaped connector with 15 pins inside. The longer connector between a SATA data cable, and a SATA power cable )

Did you forget which SATA data cable plugs into where, on the motherboard?
Don't sweat it.

The beauty of SATA is that you can plug the harddrive's SATA data cable into ANY of the SATA headers (Connectors) on the motherboard, and BIOS will find it.
Same with a SATA optical drive, or any SATA device, for that matter.

IF, your SATA harddrive has a place on the back for BOTH, a SATA power cable, and a 4-pin standard Peripheral power cable, ONLY use the SATA power cable.

Using both will eventually burn out the SATA harddrive!

Example of a 4-pin standard Peripheral power cable, (Misnomered as 'Molex'),

http://www.playtool.com/pages/psuconnectors/connectors.html#peripheral

From there the main optical drive, (CD/DVD drive), has to have the audio cable plugged into the audio connector on the motherboard.
(Plus the power cable, and data cable, of course)

In the illustration this is the header down in the very far left corner, and located towards the bottom edge.
It has CD_IN marked underneath it.

In the photo it is the Black rectangular connector in the very far left corner.

If you didn't connect the 4-pin +12 Volt power cable, your Processor isn't getting any power.
No Processor operating, No computer.

No Signal on monitor.
(No video signal)

For additional questions please post in a Comment.

Regards,
joecoolvette

Jul 24, 2011 | HP Compaq Presario SR1430NX (PS566AA) PC...

1 Answer

Do I need to use the fan control that came with case? Because I heard it causes problems with the case.


Not at all... just bypass the controller and connect directly to the 4 pin power molex connector or Fan connector on the motherboard if they are available with your motherboard.

Nov 20, 2010 | Ultra Products Ultra M923 Full Tower ATX...

1 Answer

How do I find a manual for the ULT40278. I'm trying to figure out you would connect 2 fans when some motherboards have only one fan connection?


Motherboard fan connectors typically use a small 3-pin which looks like this: zero_awake.jpg
the left connector is a female connection (the side with 3 holes) the middle and right are male connections, has 3 metal pins:
  • Black: GND (ground)
  • Red: +12VDC or +5VDC (12V or 5V DC - direct current)
  • Yellow: Tachometer signal (used to read fan speeds)
NOTE: Wire color may vary, and some fans or motherboards may control fan-speed.

Some fans use a 4-pin connection, which is generally a CPU fan connector but not always:
zero_awake_0.jpg
This pictures a 4-pin connection, but may look different from other 4-pin connections because the wires are covered in a black sleeve, which keeps them safe from harm and to reduce potential negative affects on airflow created when there are lots of loose wires inside a computer case.

zero_awake_1.jpg
This photo shows a 4-pin connection attached to a motherboard next to a 3-pin connection in a motherboard. While it is not recommended in the case of the CPU's fan, in the case of other internal case fans with a 4-pin connection, it is possible to plug them into a 3-pin connector of the motherboard, but the ability to control fan speed, which is controlled in the 4th pin will be lost.

Though sometimes computers have a way of controlling fan speed on a 3-pin or 4-pin connection even without the 4th pin, such *** voltage regulation and reading tach. feedback. These things are typically things a general user doesn't need to worry about unless their computer is running particularly hot and causing trouble.

In which case, it might be worth investing some money in a fan controller, which takes a power connection, several fan connections (varies based on the controller you get) and gives you the ability to control fan speed externally on your computer case. My controller has nice dial knobs, though some "fancy" controllers have a display and up and down buttons. (Fan controllers would be at your own discretion in terms of price, you can get them cheap all the way up to seemingly ridiculous expensive)

In the event of not having enough 3pin or 4pin connections on a motherboard, it is still possible to add case fans by way of 4pin molex connections:
zero_awake_2.jpg
A female molex connection

zero_awake_3.jpg
A male molex connection

Some case fans run exclusively through these connectors, others have a combination of a 3pin (or 4pin possibly, though I've never seen this combination) and a 4pin molex connector. In this case, the molex connector can connect directly to a cord from the power supply and run the fan. It is possible to run case fans without having them connect to the motherboard at all! Which makes it possible to connect more fans, with less available connections for your fans on your motherboard.

If a fan is a certain connection (any of the 3) and you need to convert it, for example:
  • a 3pin to a 4pin molex because your motherboard doesn't have enough 3pin connectors for all your fans,
adapters are available to change one type of connection to another, at many online retailers (such as newegg.com, amazon.com, or other electronic supply retailers) and some retail stores, Best buy might have something, though you'd have a safer bet at a store like Micro Center which is more specialized for PC building or an alternative PC/electronic store.

To ensure you solve your problem, just be sure to familiarize yourself with the motherboard you are planning on buying (or have) and the fans you plan to have inside your computer. It can be a bit more work to check the specs on the fans and motherboards, but a little work saves hours of headache later.

Nov 03, 2010 | Ultra Products Ultra ULT40278 XT MicroATX...

2 Answers

Does this hp dc5100 use sata drives


Yes it uses Sata drives.So if you are planning to use sata drive then you can.Your hp dc5100 uses sata drives.

Please rate me if this solution works for you

Thanks......Have a great time.


Jul 20, 2010 | HP Compaq dc5100 Small Form Factor PC...

2 Answers

Odd PC Build Bootup Problem:: I recently built a PC and have an odd problem when booting up. Build: MOBO: M2N32-SLI Deluxe CPU: AMD 6000+ RAM: Corsair 2 x 2048 PC6400C5 GPU: Sapphire Radeon HD 4670 1GB...


Instead of connecting you're fans to a single 4-pin molex on the power supply why not use the motherboards 3-pin molex fan connectors coming off the motherboard. See page 2.2.4 in your manual. Though I agree you should still be able to run 4-pin molex connectors to all fans off of you're PS. Allow the mother board to supply the 12v current to you're extra fans.
CHA_FAN1
CHA_FAN2
CHA_FAN3
CHA_FAN4
You're motherboard will supply the needed power. Less wiring will also allow better air flow through out the system and less strain to the fan controllers.
4-pin molex to 3-pin female; http://www.avadirect.com/product_details_parts.asp?PRID=11410
OR
http://www.microbarn.com/details.aspx?rid=101317&source=froogle

Happy New Year!
Mike

Dec 29, 2009 | ASUS M2N32-SLI Deluxe/Wireless Edition ATX...

1 Answer

Trying to install a missing fan but cant find the power pin


These are relatively simple to find.
Although there are some complications when locating them, for the most part, they're in no way difficult to locate, the problem YOU may be having though, is that you just don't have a pin output for another fan.
IF that is the case, simply go to your nearest computer hardware store, and purchase a 3pin ATX fan to 4pin Molex Connector Cable.

they look like this:
[img]http://i.s.shopwiki.com/i/data/140x140/4/735/332/aHR0cDovL2VwLnlpbWcuY29tL2lwL0kveWhzdC0xNTYyMzEyMTk4NjM5NV8yMDUzXzEzOTY5NTEz==.jpg/img]

that will allow you to change the fans connector to something you can use. Simply remove the female molex on your hard drive if you don't have a free male, and mate them, then rehook the new empty one to the hard drive, and the fan to the other.
**note** this DOES take power from your PSU (power supply unit) so make sure that you have something of a good wattage, since this will take a 12 volt discharge to be kept.

Jun 17, 2009 | Dell Computers & Internet

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