I have a HP-Pressario 10 Desktop which had the cables from the 250 watt power supply unhooked. I need a diagram to rehook the cables correctly. This is a 20 pin hookup.

Even from 2008 solutions have solved a problem!

Good thing you are intelligent enough, to know the Power Supply is the problem, out of those old solutions, Christine.

Warranty? I'm almost willing to bet sitting here in this computer chair, that the Power Supply you installed, or had installed, is a low quality unit.
Not directed towards you, or whoever purchased it. We all like to save money.

I would get my money back, and look into purchasing a more reliable Power Supply, IMHO.

Recommendation?

If this is a Compaq Presario SR5505f Desktop PC, as the problem title states, it uses an ATX form factor Power Supply, and is rated at a maximum Wattage of 250 Watts.

The ATX form factor is used in a LOT of desktop computers.
Plenty, and readily available,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=1389575&CatId=1078

These babies are RE-LI-A-BLE.
What's that? 430 Watts?

Yes. You should have at least 10 percent more power, than the computer needs. I know. A lot more than 10 percent.

Fact: A computer only uses the power it needs, and NO more.
If the computer for example, needed 100 Watts to surf the internet, it only uses 100 Watts.

Gaming? Using an intensive game program? Yes. Then you could use
UP TO the maximum.

If you replaced the Power Supply with a 250 Watt unit, as logic of course would dictate, it is no wonder it has gone on to the, 'Great Power Supply in the sky'.
Those units are cheap. Cheap as in low quality.
1) Low quality Rectifier Bridge
2) Low quality Electrolytic Capacitors
3) Low quality Power MOSFET's.
4) Light gauge wiring.

If you need guidance in replacing the unit, (If you were not the one who did), please post back in a Comment.

For additional questions please post in a Comment.
Regards,
joecoolvette

The HP Pavilion w1907, 19 inch Widescreen monitor, RK283AA,
uses 49 Watts in operating mode, 2 watts in sleep mode.

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00916924&tmp_task=prodinfoCategory&cc=us&dlc=en&lc=en&product=3351967

The Compaq Presario SR5410F Desktop PC, has a 250 Watt power supply. (Maximum wattage rating )

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01374067&tmp_task=prodinfoCategory&cc=us&dlc=en&lc=en&product=3686678

Theoretically.

Back in the day when this computer was made, Power Supply manufacturers were 'fudging' a bit on the truth.

(HP has their Power Supply's made by another company.
Bestec, HiPro, and Delta, are three of them )

Actual wattage is more like 60 to 70 percent, of what is stated.
250 divided by 10 = 25.
25 times 6 = 150 (60 percent)
25 times 7 = 175 (70 percent)

Your Power Supply's actual maximum rated wattage, may be as low as 150 Watts!

Going with the Power Supply produces a maximum of 250 Watts;

If you are playing an intense game, or have several programs running at once, you MAY reach using 250 Watts.

Just surfing the internet? About 100 Watts.

Desktop PC plus Monitor:
1) Surfing Internet: 149 Watts, or let's just say - 150 Watts

2) Computer is maxed out running hard?
249 Watts, or let's just say 300 Watts.

Voltage times Amperage = Wattage
Wattage divided by Voltage = Amperage

Number 1 above? About the power it takes to use a 100 Watt light bulb, and a 50 Watt light bulb. (Incandescent)

Number 2? About the power it takes to run three 100 Watt light bulbs.
(Incandescent)

Regards,
joecoolvette

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

Bad Power Supply.
Weak Voltage power rail.

The Pavilion a6000n desktop computer uses an ATX style of power supply, and is rated at 300 Watts.
(Probably made by Delta Electronics)

The ATX style of Power Supply is used in over 85 percent of PC's. Very common unit.

[Case size is approximately 6 inches Long, 6 inches Wide, and 3-1/2 inches Tall ]

What you are looking for is an ATX power supply with at Least 300 Watts, and the correct power cables.

Note that a computer only uses the power it needs, and No more.

Wouldn't matter if you had a 10,000 Watt Power Supply, (Exaggeration), and the computer only needed 100 Watts, it will only use 100 Watts.

(Surfing the internet typically uses 100 Watts.
Computer. Monitor uses it's own power, and is separate from this figure)

This is HP Support > Pavilion a6000n desktop computer > Specifications,

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00873231&tmp_task=prodinfoCategory&lc=en&dlc=en&cc=us&product=3377269&lang=en

This is HP Support > Pavilion a6000 desktop computer > Motherboard Specifications,

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00906129&tmp_task=prodinfoCategory&lc=en&dlc=en&cc=us&product=3377269&lang=en

1) Scrolling down the page, and looking at the photo of the motherboard, you can tell the Power Supply must have a 24-pin ATX main power cable.

To the right of the Blue, and Black ram memory slots is the 24-pin ATX main power cable connector, on the motherboard.

It is White in color, and consists of 2 rows of 12 socket holes.
24 total.

On the illustration it is marked as - ATXPOWER.

This is a closer look at a typical 24-pin ATX main power cable, and it's respective connector,

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

Note the Lock on the side of the connector. The Lock is hinged in the middle, (Plastic), and operates like a see-saw on a playground.

Squeeze the top of the Lock in to remove the 24-pin ATX main power cable.
ONLY gently pull up on the connector, and NOT the wires.

[This action brings the hooked end of the Lock away from a 'Bump', or protrusion, that is present on the female connector, on the motherboard ]

2) The Power Supply must also have a 4-pin ATX +12 Volt power cable.

On the illustration where it states Socket AM2 is the Processor socket.

To the left, and down a little of the Processor socket, is a blank square.
The writing under it is illegible.

This is where the 4-pin ATX +12 Volt power cable plugs in.

On the motherboard photo it is to the left of the white Processor socket, and is square in shape, with four socket holes.

This is a better look at a 4-pin ATX +12 Volt power cable, and it's respective connector,

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

Color of the plastic used in the connectors, does not matter.

3) Looking at the Specifications page, you will see that the Power Supply must have at least 1 SATA power cable.
It's used for the 250GB SATA harddrive.

Closer look at a SATA power cable, and it's respective connector,

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

NOTE*
If the SATA harddrive in your computer has a place for a SATA power cable, and a 4-pin Peripheral power cable, ONLY use the SATA power cable.
DO NOT use both.

4) Again looking at the Specifications page, the Power Supply must have at least two, 4-pin Peripheral power cables.
Used for the optical drives.
(DVD drives)

A closer look at a 4-pin Peripheral power cable, and it's respective connector,

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

There may be more 4-pin Peripheral power cables needed, to run any computer case fans.

[The Processor fan plugs into the motherboard ]

An example of an ATX power supply that is 500 Watt rated, and has the correct amount of power cables, plus the correct type of power cables,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3255392&sku=ULT-LS500

No you don't. If you think the power supply is bad, then unplug it, unscrew it, and take it to a discount place like Fry's to simply match it. Compaq does not make its own power supplies, so they use generic ones, like everyone else does. The only thing you have to choose is how many watts you need. The original may have been rated too small if it went bad, and you many want one with more power, like 500 watts.

Hi,
You can find the same psu at ebay with free shipping.

http://itemlistings.ebay.com/sdcsrp?fl=360131455504&product=bestec+atx-250-12e&sconstraints=PriceMin.Value%3D23.00%26PriceMax.Value%3D45.59

Hi,
It's 250 watts output, mate.

http://cgi.ebay.com/NEW-250W-power-supply-for-HP-PAVILION-a705w-a706n-a708n_W0QQitemZ270325532996QQcmdZViewItemQQimsxZ20090104?IMSfp=TL090104114008r23161

Fixya!

Chris (ziraffa)

You can use any 250-Watt ATX Power Supply with Power Factor Correction.

Az.

the 9600GSO uses arounf 250 watts under load. While I cannot fing exact spec for the HP PSU I would be surprised if it were more that 350W. Is there any indication on the case or can you open the case up and look at the PSU?

9600 GSO Power

You need somthing in the order of 450W or greater. Get an Enermax, Corsair or other good quality PSU.

The next time you get a PSU. Tell them what you have. Apparently you got one that is not compatible with your compaq.The power (500 wattage) will work with your MB.
Get an OEM PSU from Compaq(HP).