I need an internal pin out diagram for a 4 Pin connector to connect power supply to a hp pavillion f70 monitor. I do have a power supply with same specs but it has a normal plug with outer as +ve and Inner as -ve.

Hello,

The power supply is 12v. There are two different versions of that model monitor and the plug connector for the power is different. One version has 4 pins on the power connector on the other has just a center pin and barrel. You need to check the connection on the back of your monitor before you order that adapter to be sure and get the correct one that you need. You can get both type here:
http://www.ccl-la.com/catalog/index.php?cPath=25

Presuming you mean the Earthwatts 500:
Should work, though the Earthwatts has the 24 pin ATX instead of the 20-pin.
http://www.atxpowersupplies.com/manuals/Antec-Earthwatts-EA-500D-user-manual.pdf
You just need to snap the 24-pin connector apart to make it work as a 20-pin. It can be snapped back together for future motherboards.
The Bestec is just a standard ATX power supply

The secret: all the wires are oriented (you cannot plug the in backward), and your replacement
power supply must have a connector for each of your peripherals.
Even the connector going to the motherboard is oriented.
Make sure everything on this list has a power connector plugged into it, then
power up the desktop system and compute.

1. motherboard
NOTE: everything below in the list resides in a peripheral bay
2. HDD (hard disk drive) (there may be several)
3. FDD (floppy disk drive)
4. CD-ROM
5. DVD-ROM

If you run out of connectors, buy a "Y-connector" at your local "Computer Goodies" store.
As you connect these devices try to utilize proper anti-statis techniques - meaning, if you don't have an anti-static strap to clip onto the Pavilion A810N frame, then be sure to ground yourself
by touching the frame with a forearm or something as you make/unmake the power connections,
while at the same time try to avoid touching the (CMOS-based) IC chips or PC board surfaces.
forearm
External drives (incl tape drives) get their own power - not from your 400W Dynex.
Your computer monitor will also gets its own power (from a 120VAC 3-prong CEE cord)

Bad Power Supply. Weak voltage power rail.

Has enough power to light LED lights, and maybe spin fans, but not enough to turn the Processor on.

1) ALL of the LED lights on at once use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts.

3) A typical Processor uses 51 to 125 Watts. Depends on what Processor it is.

The Compaq Presario SR2013WM desktop computer, comes with an AMD Athlon 64 3800+ processor, that fits in a Socket AM2.

1) http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00777760&tmp_task=prodinfoCategory&lc=en&dlc=en&cc=us&lang=en&product=3300335


Can use up to 62 Watts.

2) http://en.wikipedia.org/wiki/List_of_AMD_Athlon_64_microprocessors#.22Orleans.22_.28F2_.26_F3.2C_90_nm.29

No Processor operating, no computer.
No computer operating, No Signal to the monitor. (No video signal, or also known as No VGA Signal)

The Power Supply used is just one of the common ATX form factor power supply's.
Used in over 80 percent of PC's out there, and readily available.
(ATX size of the power supply case, is approximately 5-1/2 inches Long, 3-1/2 inches Tall, and 6 inches Wide)

It is 250 Watt, and a generic model. Probably made by Bestec, Delta, or HiPro.
(You can use a larger wattage Power Supply with NO problems.
A computer ONLY uses the power it needs, and NO more)

A) The ATX main power cable is a 24-pin ATX main power cable. All of the new power supply's have an ATX main power cable, where the connector can be used as a 20-pin, or 24-pin.

B) Uses a 4-pin ATX +12 Volt power cable.

C) Past the two power cables above, just make sure the Power Supply has a SATA power cable, (For the SATA harddrive), a Floppy Drive power cable, (Used for the Card Reader), and enough 4-pin standard Peripheral power cables.
(Misnomered as 'Molex')


3) Typical 24-pin ATX main power cable,

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

4) Typical 4-pin ATX +12 Volt power cable,

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

5) Typical SATA power cable,

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

IF, the SATA harddrive has a provision for using a 4-pin standard Peripheral power cable, AND a SATA power cable, ONLY USE THE SATA POWER CABLE.

If you use both you will burn up the SATA harddrive.


6) Typical 4-pin standard Peripheral power cable,

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


Have questions regarding the above, or need recommendations on a Power Supply, please post in a Comment.
Regards,
joecoolvette

Most motherboards now have a 24-pin power supply connector. If you haven't already found a diagram showing the pinouts of the 20- and 24-pin power plugs, here's one borrowed from a handy site:



The two plugs are essentially the same, but the 24-pin version duplicates some voltages on the extra pins. The extra pins in the larger connector were meant to provide extra current paths for voltages that see heavy loads from newer processors and motherboard circuitry. Depending on how a motherboard is designed, it might work with a 20-pin plug connected (leaving pins 11, 12, 23 and 24 empty). But typically if the board has a 24-pin connector it needs the 24-pin power supply plug.

Most power supplies have a 20-pin plug with a separate 4-pin section that fastens to it for connection to a 24-pin mobo connector. It typically has one side designed to slide onto the end of the 20-pin plug, essentially turning it into the 24-pin version. This added plug does not have a retaining clamp on its side, so you can tell it from the the 4-pin CPU power plug. The wire colors are also different. For reference, here is the processor power plug, from the same website:


New motherboard specs call for the separate processor power connector for the same reason the extra pins were added to the power supply connector: to handle the high currents needed by increasingly faster CPUs.

When the motherboard has these connectors, you need to use them all to get everything working. Hope this helps. Thanks to smspowersupply.com for the diagrams, and thank you for using Fixya.

Since your monitor requires 4-pin dc connector: http://insidecomputer.stores.yahoo.net/ac-power-adapter-4pin-for-hp-lcd-l1510-l1520-41510152015201720175060.html
You may want to buy a new one, or if you really want to know which pins are positive and negative, you will need and Ohm meter and open up the monitor, attach on lead of the meter to a fuse on the main board (it will be labeled with Fxx) and another lead of the meter to one of the 4-pin power input at a time, two of them should indicate less than one Ohm, once you find that, the next to do is to trace out the copper trace of the PCB, it should be connected to the POSITIVE lead of the Electrolytic capacitor (usual value will be 220~470uF). Next, connect one of the meter lead to the metal part of the chassis, then measure the reistance of the other two pins of the power connector, it should be leaas than one Ohm. If you get all this reading then the monitor is using Negative ground system for the electronics.
Notes; most monitors that use 4-pin connector with single power supply (it will show spec. something like12V 5A), then two pin will be tied together (12v is fed to two pins, Ground is fed to two pins). Hope this help.

well the PSU cables for the mobo should only be able to be hooked to one place on the board. i'm not sure if this is a 20 pin and a 4 pin or just a 20 pin, but the 20 pin connector should only fit one place and snap in. you don't need a diagram, if you're wondering about all the rest of the cables it doesn't matter where you plug what 4 pin connector to. as long as they're connected..

If you need further help, reach me via phone at https://www.6ya.com/expert/joel_63c670a84e9f6a97

i presume that is a pentium 4 or newer motherboard. you will need a power supply that has at least one or two of the small four pin connectors as well... generally if it has that the extra four pins slides onto the 20 pin connector on one side and that makes up your 24 pin connection.

pin no 1 - Red colour signal (Red colour wire)
pin no 2 - Green colour signal (Green colour wire)
pin no 3 - Blue colour signal (Blue colour wire)
4&5 Not connected
pin no 6&7&8 are (Grounds)RGB Returns
9&10 NC
pin 13 Hohizontal sync signal
pin no 14 vertical sync signal
Not nessasry other pins

Dhen: This monitor uses a special Power Adapter as shown... Also the Pin designation is from the NOTCHED PART BEING ON TOP: NOTCH U +V O O +V GND O O GND SithPitt