ATX Power supply

http://h10025.www1.hp.com/ewfrf/wc/document?lc=en&cc=us&docname=c00026876

Motherboard: ASUS P4SD Motherboard Specifications

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00022505&lc=en&cc=us&dlc=en#c00022505_doc

Board Form Factor: uATX

uATX stands for Micro-ATX,

http://en.wikipedia.org/wiki/MicroATX

http://en.wikipedia.org/wiki/Computer_form_factor

http://en.wikipedia.org/wiki/Computer_form_factor#Tabular_information

HOWEVER, the Power Supply is an ATX form factor,

http://www.911forpcs.com/hp-media-center-power-supply.html

,of a sort.

Form Factor related directly to desktop computer Motherboards.
Now has 'evolved' to relate to the computer case, and Power Supply.

When referring to a Power Supply, and the ATX form factor; you are not only referring to the size, and shape of the Power Supply's case; but also the type of power cables used, and the technology used within.

Size and shape of an ATX power supply is approximately;

6 Inches Wide, 5.5 Inches Long, and 3.5 Inches in Height.
(152.39mm Wide, 139.69mm Long, and 88.89mm in Height)

Power cables included with Power Supply's nowadays, will include all the power cables you'll need, with probably some left over.

HOWEVER, looking at the 'ATX' form factor designated for your computer, to wit from the ad above, it does NOT fit the above size, and shape.

More like 6 Inches Wide, 4 Inches Long, and 3.5 Inches in Height.
Looks like they just crammed everything into one small box.

Remove motherboard, and all internal hardware, into a new computer case?
No prob!

Most Mid-Tower to Full Tower size computer cases, will have a Support Plate that accommodates a Micro-ATX form factor motherboard, OR an ATX form factor motherboard.

Just look at the Support Plate mounting holes.
Ones for a Micro-ATX (uATX) motherboard, will have uATX next to them, or MATX, or mATX.

Ones for an ATX motherboard, will have ATX next to them.

However check the computer case manufacturer info to be sure.

[ The motherboard mounts to a Support Plate.
The Support Plate can be an integral part of the metal frame, of the computer case; or a separate metal plate that attaches to the computer case metal frame ]

Not what you had in mind Joel? Post back in a Comment.

Regards,
joecoolvette

Acer computers are known to have low quality Power Supply's.
The one in your Acer could have a weak voltage power rail. No, not something that is easily fixable. It's more intelligent to replace it with a KNOWN to be good, Compatible power supply for a test.

1) Monitor not detecting.
In otherwords, No Signal. No video signal because the computer isn't working. LED lights may light, perhaps fan/s spin, but there isn't enough power to turn the Processor on.

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

B) EACH fan 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.


Intel Pentium Dual Core E2160? Can use Up To 65 Watts,

http://en.wikipedia.org/wiki/List_of_Intel_Pentium_Dual-Core_microprocessors#.22Allendale.22.2C_.22Conroe.22_.2865_nm.29

[ TDP = 65W
Thermal Design Point.
65 Watts ]

Known to be good, Compatible power supply:

The Acer M1640 desktop computer just uses an ATX form factor power supply. The kind installed in over 80 percent of desktop computers out there.

Form Factor is a term used for motherboards, but has gone on to other various computer parts.
It refers to the size, and shape of the Power Supply's case, and the power cables the power supply has.

Size and Shape:
Approximately 6 inches Wide, 5-1/2 inches Long, and 3-1/2 inches Tall.

Power Cables:
1) 24-pin ATX main power cable,

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

2) 4-pin ATX +12 Volt power cable,

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

3) Should have at least 2 SATA power cables.

4) Should have one 6-pin PCI-Express power cable.

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

5) Two to Four, 4-pin ATX standard Peripheral power cables,

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

{Misnomered as Molex. The name Molex stuck, just like Crescent wrench did for an open-end adjustable wrench }

[ The links to power cables above are part of a main page. Scroll up to the top of the page, and click on the photo - SATA power cable, for more info on SATA power cables ]

Perhaps there is an unused computer, that you can borrow it's power supply for a test unit.
The Acer M1640 just uses a 250 Watt power supply. (ATX form factor)

(If the power supply has more Wattage it's okay.
A Computer ONLY Uses the Power it Needs, and No More.

If you installed a 10,000 Watt power supply, {Exaggeration}, and the computer only needed 100 Watts for what it was doing, it would ONLY use 100 Watts, and No more )

Would like to hear back from you. Post in a Comment.

Regards,
joecoolvette

I'm going to base this solution on two scenarios from the info you have posted.

1) The power to your home/business went out. Now it's back on.

2) The power has been on all along, and the computer quit.


Based on 1) above;

The Power On switch could be bad, or the Power Supply.

A voltage spike could have occurred, and taken out the ATX power on switch.
(A generic ATX Power On switch is around $5. Example,

http://www.axiontech.com/prdt.php?item=78201 )

A voltage spike could have taken out a power supply that is of low quality, and/or on it's last leg.

The power supply used in an HP Pavilion a1100y desktop computer is of low quality.
Low quality components are used inside.
(Bestec, and Delta are two of the low quality power supply's used by HP in this time frame)

Plus add to the fact that the computer has some age on it, (5 years old?), and could be dirty inside.
Dirt,dust, etc. 'kills' computers and power supply's.

There is a simple test to perform to see whether the problem is the Power Supply, or the Power On switch.
(The Power On switch is located within the plastic Power On button assembly)
If you wish to know how to perform this test please post in a Comment.
(Free)


Based on 2) above;
The Power Supply is bad.
The test would be either to use a multimeter, and check the three main voltages coming out of the Power Supply,
Or,
Substitute the power supply with a KNOWN to be good compatible unit.
(250 to 300 Watt)

(Sometimes access to another known to be good, compatible power supply may be obtained from a computer that is no longer in use. The user has upgraded to a better computer.
Compatible being that the Power Supply has the required Wattage, and required power cables)

[The three main voltages produced by an SMPS (Switched-Mode Power Supply) used by the Pavilion a1100y desktop computer are;

A) 3.3 Volts DC (Orange wire)
B) 5 Volts DC (Red wire)
C) 12 Volts DC (Yellow wire)
In comparison two D cell flashlight batteries produce 3 Volts DC ]

This is HP Support>Pavilion a1100y desktop computer> Motherboard Specifications,

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00499325&tmp_task=prodinfoCategory&lc=en&dlc=en&cc=us&site=null&lang=en&key=null&product=1118244

Looking at the motherboard illustration, and photo at the bottom of the page, we can see what power cables are needed for the motherboard;

A) 24-pin ATX main power cable
(Connector on motherboard illustration marked as ATXPWER1. In the photo it is whitish, and has two vertical columns of 12 square socket holes. It is to the Right of the Ram Memory slots)

B) 4-pin ATX main power cable.
(Connector on motherboard illustration is marked ATX12V. It is to the left of the Intel Northbridge chipset - Intel 915GV GMCH.
In the photo it is the whitish square connector with four square socket holes. It is to the Left of the
aluminum finned Heatsink, sitting on top of the Intel Northbridge chipset)

Other power cables needed are;
1) A SATA power cable for the SATA harddrive
2) One or two 4-pin Peripheral (Standard) power cables for the optical drive/s. (CD/DVD drives)

The Processor fan cable attaches to the motherboard. (CPU_FAN)
The computer case fan attaches to the motherboard. (SYS_FAN)

The ATX form factor is used primarily for describing a motherboard.
Form Factor denotes the size, and shape, and power cables for a Power Supply.

The ATX form factor for a Power Supply;
Size: Approximately 6 inches Wide, 5-1/2 inches Long, and 3-1/2 inches Tall.

A $40 ATX power supply with 300 Watts will do just fine. No need to buy an expensive Power Supply based on advertising as a direct substitute.

One example of an inexpensive reliable ATX power supply for a Pavilion a1100y desktop computer,

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

Has all the power cables you'll need. Actual maximum wattage rating is 350 Watts.
Information,

http://www.hardwaresecrets.com/article/332

For additional questions or to clarify anything I have stated, please post in a Comment.

Regards,
joecoolvette

Your motherboard uses a standard ATX power supply 20 pin power connector. Most ATX power
supplies should be compatible with your board..get a supply rated at 450 watts or higher for
future expansion of your system

depends on the case that it is in. for the physical size. but normally any ATX power supply of 350watts or better is a good selection.
i need a picture of the case to be sure

Hi:
You can hook up that power supply, no problem. A motherboard will only draw as much current as it needs.

Most computer testing facilities will test your current power supply for free. A replacement is very inexpensive to replace. Bestbuy, MicroCenter, small computer shops and buy replacement from Amazon.com, newegg.com.. Just make sure you have the correct information for your replacement. The model number on the power supply would be your best bet in most cases. Good luck and have a great day. I buy power supplies as low as $15 dollars Generic

If you need further help, I’m available over the phone at https://www.6ya.com/expert/william_02fc2766c1e13b73

Hello,

If your motherboard is wtx connection , pretty sure that there are 2 ports in it. the 24 pins and the 22pin. so maybe you need a WTX power supply which is availbale today. this is tha example (http://images.google.com.ph/imgres?imgurl=http://www.acmemicro.com/estore/prodimg/PS-ZP-T6460.jpg&imgrefurl=http://www.acmemicro.com/estore/merchant.ihtml%3Fpid%3D840%26lastcatid%3D59%26step%3D4&usg=__Ox5OtEG9zc7AqUAus-hrVrOEvyA=&h=180&w=180&sz=8&hl=tl&start=1&tbnid=yrGwUf_iyMZMxM:&tbnh=101&tbnw=101&prev=/images%3Fq%3Dwtx%2Bpower%2Bsupply%26gbv%3D2%26hl%3Dtl%26sa%3DG)

maybe you can find a PSU for your stuff in that link.

may this help,

melnavz

Essentially any Standard ATX power supply with a rating of 250 Watts or higher will work

http://www.discountelectronics.com/index.php?l=product_detail&p=1849

no the supplier is trying to make some extra money they alway try to say stuff to make extra green that will work fine