COMPUTER will not power the fans are on but i think i need a processor. I used the one from the orginial motherboard the one under the fan

Every computer comes built with a processor cooling fan system.
The fan's main function is to keep the processor from overheating.
After long periods of use, processor fans can start to malfunction.
If your eMachines computer's fan is excessively noisy, it will need some maintenance.
If you don't deal with a noisy fan promptly, your computer's processor could overheat and cause significant damage to your motherboard as a result.

WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL.
http://www.kitchentablecomputers.com/static.php - rules
Only work inside the computer case when the power has been switched off and disconnected. Never open the power source.
Some of the below steps recommend removing physical parts within the computer.
While in the computer it is highly recommend that you be aware of ESD and its potential hazards.
Power down the computer.
Disconnect all cables and peripheral devices from the computer's back panel.
Rotate the computer so the back panel is facing you. Lay the computer on its left side.
Remove the Phillips thumb screws that fasten the right side access panel to the computer's frame.
Remove the side access panel from the computer to reveal the motherboard and all internal components.
Locate the cooling fan assembly near the center of the motherboard.
Remove all Phillips screws fastening the fan to the motherboard.
Disconnect the fan's power cable from the motherboard.
Then lift the fan out of the computer.
This will reveal the processor chip.
Place the fan on a flat work surface with the label sticker facing upward.
Use a thin, flat-head screwdriver to peel away the label sticker from the fan.
This will reveal the access hole to the fan motor's bearings.
Apply one to two drops of lightweight mechanical oil into the fan motor's bearings.
Replace the fan's label sticker.
Use a can of compressed air to spray the dust and debris from inside the fan blades.
Place the fan back into the motherboard on top of the processor chip.
Replace the retention screws and reconnect the fan's power cable to the motherboard.
Replace the side access panel and its two retention thumb screws.
Place the computer tower vertically, and then reconnect all cables and devices to the computer.

From your description it sounds like Electrolytic Capacitor's on the motherboard are fried

The one's used in the motherboard voltage regulator circuit, and more specifically the one's used to control voltage for the Processor.

Tall statement?

"I was using the PC as usual (not working on it). It just rebooted itself; came on for a minute, and then shut off; with the exceptions of the fans. They got very loud."

Processor isn't working. All the power is going to the fans.

http://www.youtube.com/watch?v=KN6_-8fYHo0

Starts at 0:04

This is a video of why your computer restarts.
It's because of bad Electrolytic Capacitors, in the motherboard voltage regulator circuit, and more so, the one's that control voltage for the Processor.

Eventually the capacitors fail enough, and/or more than the needed amount of capacitors fail; and the Processor turns off.
(BIOS turns it off)

Isn't stated in the video. However, I used the video for reference for you.

http://www.hardwaresecrets.com/article/616

NOTE that capacitors, used in the motherboard voltage regulator circuit
for the Processor, are not just the one's immediately surrounding the Processor.

You have to follow the circuit traces on the motherboard, (Bottom and Top), and follow from the processor socket.

Some of the capacitors used for the Processor, could be pretty far away from it, on the motherboard.

[Circuit traces. Also known as signal traces.
Think; Very tiny thin flat copper wires, on the motherboard ]

eMachines are a budget computer. NOTHING wrong with that.
However one of the cost cutting choices they make, is using low quality capacitors.

All of the above sound like a foreign language? Sorry, not meant to be.
The main thing is to use the following link for reference, and look at the capacitors on your motherboard.
(Close. May need a light)
{Power unplugged from computer, and FOLLOW Anti-Static Precautions}

http://www.capacitorlab.com/visible-failures/index.htm

No?
Then suspect the Power Supply. Need guidance in testing it post back in a Comment.

Regards,
joecoolvette

Bad Power Supply. Weak voltage power rail.

[There are three main power rails in the SMPS for your desktop computer.
A) The 3.3 Volt power rail
B) The 5 Volt power rail
C) The 12 Volt power rail ]

1) ALL of the LED lights on at once 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 125 Watts of power.
Just depends on what Processor it.

Remove the Processor, and you will have power to light LED lights, and spin fans.
Of course without a Processor operating, you have No computer.

Replace the Power Supply.

Do you have a KNOWN to be good, Compatible power supply available to use for a test unit?

Need guidance in replacing, or suggestions for Power Supply's to choose from, post In a Comment.

Regards,
joecoolvette

I like that. Kinda' rhymes. "Fan OK but no Display"

Problem is your Processor isn't turned on.

You have a bad Power Supply.
> Weak voltage power rail.

You probably have a 200 to 300 Watt power supply. (SMPS)

1) ALL of the LED lights together use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts.

3) A typical Processor can use 51 to 125 watts. Depends on what Processor it is.

The Intel D845GVSR motherboard uses a Socket 478 processor socket.
Supports Intel Celeron, Intel Pentium 4, and Intel Celeron D, that utilize a Socket 478 processor socket, and have a maximum FSB of 533MHz.

http://en.wikipedia.org/wiki/List_of_Intel_chipsets#Pentium_4_Chipsets

Utilizes the Intel 845GV motherboard chipset.
[ Intel 82845GV Northbridge chip, and Intel ICH4 Southbridge chip ]

89 Watts is the maximum wattage, that can be used by a Processor for the Intel D845GVSR motherboard.

Power Supply has enough power to light LED lights, and spins fans, but not enough to turn the Processor on.
No Processor operating, No computer.
No computer, No video signal to the monitor.
(No Signal)

Do you have access to a KNOWN to be good, compatible Power Supply, for a test unit?



Motherboard Manual in PDF file form:

http://www.intel.com/p/en_US/support/highlights/dsktpboards/d845gvsr

Under the heading > Documents and Guides, left-click on > Product Guides for D845GVSR.
Then left-click on the first file listed.
Product Guide - PDF File Name: D845GVSR_ProductGuide_English.pdf

A) Power Supply.

One of the leading causes of computer failure.

LED lights come on? Fans spin, or spin a few times, and stop?

Bad Power Supply. Weak voltage power rail.
1) ALL of the LED lights combined 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. (Older Processors such as Pentium II's for example, use less)

No Processor operating = No Signal on the monitor.
No video signal.

But if you do think it's a problem with the Ol' Goldfish 3, look at the Electrolytic Capacitors on the motherboard.

1) http://www.capacitorlab.com/visible-failures/

I do not understand what do you want to find under the processor??? Leprechauns???

If you desperately want to clean your computer, never ever use vacuum cleaner, if you want to clean heatsink and fan, exactly remove only and only fan, brush and blow heatsink if you must.

Now, again, as you did put already your computer to pieces:

1. switch off computer, remove power cord from teh socket
2. remove again the wall,
3. remove heatsink and fan, check if processor is correctly installed, replace heatsink and fan,
4. remove and re-insert memory sticks, thes have tendency to burn or get moved during cleaning, check if memory is correctly inserted
5. check power connectors on the motherboard, 24pin as well as 4 pin
6. check power supply itself

If computer after tha procedure still do not start, tehre question arises:
1. did you used vacuum cleaner to clean?
2. did you use static strap...

If your answer is yes/no you fried your processor, memory or motherboard... or all three, check then all three components against known working computer and then replace bit which you fried...

I would still say it is power supply! Check with power supply from another computer.

You have intermittent power supply to the fan, you have no power supply to the motherboard, processor fan is not spinning , not is indicator diod on the board, first instance and easiest to check is always power supply.

If power supply is not a reason, check on motherboard high volume capacitors, especially around processor, capacitors should have flat tops, if tops are buckled, that meant capacitor/s is/are gone and motherboard can be used as a decoration, if you do not have special soldering iron to replace surface mount circuitry, do not bother even to think to replace them.

After the computer has powered off, unplug it from power.

You need to replace the Processor fan.

(CPU stands for Central Processing Unit.
Another term used is Microprocessor, or simply Processor)

When a Processor becomes too hot, (Passes it's thermal limit), the Processor turns off.
(BIOS turns it off)

This is a Fail Safe feature to keep the Processor from burning up.
(Literally in some cases, as in on Fire!)

Your motherboard was made by TriGem.
It's a TriGem 2002052.
HP's name is Glendale.

http://h10025.www1.hp.com/ewfrf/wc/document?docname=bph07813&tmp_task=prodinfoCategory&lc=en&dlc=en&cc=us&lang=en&product=90832

Scroll down for a photo, and illustration of the motherboard.

There are No hardware components installed on the motherboard.
No Processor, Ram Memory, or any expansion cards in those white PCI slots.

The Black rectangular 'frame' you see, with the White rectangular block in the middle, (Has socket holes in it), is where the Processor plugs in.

When you open your computer, you will not see the Processor.
It is under the Heatsink, which is under the Processor fan.

Basic example of a Heatsink, with a Processor fan sitting on top of it,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=578161&CatId=795

It is that CPU fan, (Processor fan), that has failed.
The fan has bad bearings, and is no longer spinning, or spinning Very slow.

(Or spins a few times, stops, then spins a few times again, and so on)

Replace the Processor fan.
A better method is to replace the Heatsink, and Fan as a combo.

As shown in the above link.

The HP Pavilion 513c desktop computer, uses an Intel Pentium 4 processor, or Intel Celeron processor, that fits in a Socket 478 processor socket.

HP Pavilion 531c specifications from HP Support,

http://h10025.www1.hp.com/ewfrf/wc/document?docname=bph07769&tmp_task=prodinfoCategory&lc=en&dlc=en&cc=us&lang=en&product=90832

Not very explanatory, I'll admit, but under the heading
Base processor and speed,
it lists,
C(W) 1.8GHz /400

Stands for the Processor when operating at maximum capability, will have a frequency rate of 1.8GHz

The 400 stands for 400MHz FSB.
(Front Side Bus)

Looking back at the motherboard illustration, you will see - Socket 478 printed on the processor socket.
.
Only used for Intel Pentium 4 processors, and Intel Celeron processors.

http://en.wikipedia.org/wiki/Socket_478

You need a Heatsink/Fan combo that fits on a Intel Pentium 4 processor, that fits in a Socket 478 processor socket.

1) Work on a table

2) Computer unplugged from power, open the computer case.

3) Observe Anti-Static precautions

[Anti-Static Precautions:

Your body carries Static electricity.
Static will fry out (Short Circuit) the hardware components inside a computer.

Power unplugged from the computer, TOUCH the metal frame of the open computer case.
This will relieve your body of Static.

Should you get up, and leave your computer in the middle of working on it, upon your return be Sure to Touch the metal frame again ]

4) Use a can of compressed air for computers, and attach the plastic straw provided to the can of air's nozzle. You may wish to use a dust mask.

[DO NOT use a vacuum! Vacuums create Static electricity]

4) Spray the inside of the computer out.
Start at the top left corner, and go across to the top right corner. Let go of the trigger.

Start again. Drop down a space, (1 inch or so), spray another row across.
Keep going down in rows.

If there is thick 'Gunk', (Dirt, dust, hair, etc.), use Q-tips to dislodge the gunk, then spray air again.
(You are in essence breaking the 'crust', then the can of air can spray it out)

When you reach the bottom, tilt the case towards you, spray the bottom of the case (Computer case) out.

5) Unplug the 20-pin ATX main power cable.

[Example of a 20-pin ATX main power cable, and it's connector,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

Note the plastic locking mechanism on the side of the connector. This lock works like a see-saw on a playground. It is hinged in the middle. Squeeze the top of the lock in, to unlock it ]

6) Remove the 4-pin ATX +12 Volt power cable.
Example,

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

Has a lock on the side also.
(Don't forget to plug it back in, when you are finished installing the new Heatsink/Fan combo. It is power for the Processor.

Make sure both power cables above are plugged in tight, when reinstalling them)

Continued in a Comment.

There are several factors that could cause the above problem in your diagnoses.

A) Processor Fan is not operating, or not spinning at the set speed desired. (RPM. Revolutions Per Minute) Fan bearings are bad.
Replace processor fan.

Computer case open, observe the Processor fan as soon as you start the computer.
If the fan is not spinning, shut the computer down.
(Hold the Power On button in for a count of 10 seconds)

Observe if the fan spins slowly, or spins for a while, stops, then spins again.

B) Failing Electrolytic Capacitors on the motherboard.
C) Power Supply has a weak voltage power rail.


Failing Capacitors on the Motherboard.
Electrolytic Capacitors.
Specifically the one's used in the motherboard Voltage Regulator Circuit.

A Processor must have a Steady, Clean, supply of voltage.
The tolerance range is Very small.
Too little, or too much voltage, the Processor turns off.
[BIOS turns it off]

Part of what the motherboard voltage regulator circuit does, is to regulate voltage for the Processor.

This link gives information about what Electrolytic Capacitors look like installed on a motherboard, and photos plus info, about the visual signs of Electrolytic Capacitor failure,

http://www.capacitorlab.com/visible-failures/index.htm

(Computer unplugged from power. Observe Anti-Static Guidelines. Need more info about the last sentence, please post in a Comment)

Requires either replacing the failing capacitors, or replace the motherboard if bad capacitors are found.

If upon a close scrutiny with a flashlight, and magnifying glass, does not reveal visual signs of capacitor failure, then the next hardware component to check is the Power Supply.

3) Power Supply's have Electrolytic Capacitors also.
A computer power supply changes AC (Alternating Current) electricity from a household, or business, into DC electricity.
(Direct Current. A flashlight battery is an example of stored DC electricity)

Electrolytic Capacitors are used as Filters in a computer power supply.
They filter the incoming AC (Input Stage), and the outgoing DC (Output Stage)

Generally I have found that these are the weakest link, and are the first hardware component to fail in a PSU. (Power Supply Unit)

http://en.wikipedia.org/wiki/Switched-mode_power_supply

There is a way to test the Power Supply.
Requires either a multimeter, or a Power Supply Tester, or using a KNOWN to be good, compatible power supply to substitute, and use as a test unit.

An economical multimeter can be purchased for around $10 to $15 at many stores. An auto parts store usually carries them.
An economical power supply tester can be purchased for around $20.

This is an example of a power supply tester,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=5250576&CatId=5471

Computer dirty inside, as well as the inside of the Power Supply, will cause detrimental factors to the computer.

1) Dust is a Static magnet. Dust can create pathways for static electricity to follow, and the DC electricity used for a computer.
This can cause hardware components inside the computer to Short Circuit. (Fry out)

2) Dust, dirt, hair, etc, can clog the cooling components of the computer.
The computer case fan/s, the Processor fan, and Heatsink, and the Power Supply fan, and Heatsink/s located inside the Power Supply.

Air is drawn in through the front of a computer, (Or on some custom PC's through the side), and flows over the hardware components inside the computer, helping to cool them.

If a layer of dust, dirt, hair, and so on, has coated these hardware components, the heat will be trapped, and the air flow will not be able to carry the heat away.

If the computer case fan's are coated, their cooling capacity drops tremendously also. The fan, or fans, will not be able to provide the air flow needed.

If the Processor fan, and Heatsink are coated, the cooling capacity of these two components drops tremendously.
A Processor has a thermal temperature it can operate in, and will turn off if the temperature is exceeded.

It's a Fail Safe feature that is built-in, to keep the Processor from burning up.

[A Heatsink is essentially a plate of metal that has tall, thin fins protruding from it. Heat is absorbed into the plate, whereby it is then absorbed by the tall, thin fins.
Air flows in-between the fins, and helps carry the heat away.

This is an example of an average Fan/Heatsink combo,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=2604150&CatId=493

The Heatsink is the aluminum finned part sitting under the fan.

Using a can of compressed air for computers, on a regular basis as needed, can help prevent many computer failures.

To summarize:

1) Check the Processor fan. If the computer is dirty inside, there is the obvious factor for it's failing.
2) Check the capacitors on the motherboard visually.
3) Test the power supply, or substitute it with a Known to be good, compatible unit for a test.

[Compatible
Must have at least the same amount of Wattage, or more.
Must have all the correct power cables needed.
Must have enough of the correct cables]

There are four things to check.

One: Processor Fan

Two: How dirty the computer is inside. (Plus PSU)

Three: Power

Four: Electrolytic Capacitors on the motherboard.
[Note* PSU = Power Supply Unit, or simply power supply]

One: If the Processor fan has stopped spinning, the processor will overheat. Since the Aspire M1100 series desktop computers, use an AMD processor, the processor can overheat in less than 30 seconds, without external cooling.
(Intel's take longer)

The BIOS program in a computer, is what turns the Processor on, and also what turns it off.

If BIOS senses no processor fan operating, or the temperature of the Processor has exceeded the processor's thermal limit, the processor is turned off.
Keeps the processor from burning up.
Literally.

Computer case open, do not stick your hands inside, turn the computer on, observe the processor fan. See if it's rotating.

Observe for a small length of time, to see if the processor fan spins, but then stops frequently. Also the fan may be spinning at a slower RPM, than it should.

Solution is to replace the fan, but cost wise it may be more effective to replace the Heatsink, and Fan as a unit.

To replace, the computer is off, and unplugged from power.
Computer case open, TOUCH the metal frame of the case to relieve your body of Static electricity.

Your body carries Static. Static will fry out (Short Circuit) the delicate computer hardware components inside.
Simply touching the metal frame will alleviate this.

[Note* If you get up in the middle of working on your computer, upon your return Touch the metal frame again.
Or wear a $6 ESD wrist strap, and connect the alligator clip to the metal frame]

This is what an average processor Heatsink/Fan combo looks like, if you are not aware,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=1116581&sku=TC3G-2028

If you are aware, please ignore the above, and the following.
Heatsink/Fan combos differ in their appearance, and design, but all follow the same theory.

In the photo, the Heatsink is the finned aluminum looking object under the fan.
The Heatsink is composed of a metal flat plate, that has tall fins protruding from it.

Heat from the top of the Processors case is absorbed by the metal plate, and radiated up into the fins. The fan pushes air in-between the fins, and carries the heat away.

Therefore the area in-between the fins, the fins themselves, and the fan must be kept clean.

Doesn't take very much 'gunk', (Dirt, dust, hair, etc) to drop the cooling capacity of these two components, tremendously.
This goes along with number 2 above also.

Two: The inside of the computer, as well as the inside of the power supply, must be kept clean.

Preferred method, is to use a can of compressed air on a regular basis as needed.
[Computer unplugged from power. Anti-static guidelines as detailed above, implemented]

Three: Power supplies can fail. The power supply can develop a weak voltage power rail, and not have enough power to turn the Processor on.

It will have enough power to light lights, and maybe spin fans, (Or spin a few times, and stop), but not enough for the processor.

A) ALL the lights use less than 1 Watt of power
B) EACH fan uses 2 to 3 Watts
C) A typical processor can use 51 to 125 Watts.
Depends on what processor it is.

The Acer Aspire M1100 series processor options, are either an AMD Athlon 64 X2, or an AMD Athlon 64, or AMD Sempron.

http://en.wikipedia.org/wiki/List_of_AMD_Athlon_64_microprocessors

The highest wattage usage is 89 Watts. (TDP. Thermal Design Power)

You can test the power supply. A multimeter, or power supply tester is required. (Average cost for an inexpensive multimeter is around $12. Auto parts stores are one place these can be found. An inexpensive power supply tester can be purchased for around $20)

You can also replace the power supply with a known to be good unit, if you happen to have one around, for a test.

Has to have at least 200 Watts. The correct amount of power cables, the correct form factor, (ATX), and at least the correct amount of power cables.
If you would like guidance in testing your power supply, or replacing, simply state so in a Comment.

Four: I'm not knocking Acer computers, but they are a budget line of computer. As such they use low quality parts.

The Electrolytic Capacitors on the motherboard are one such component.

In particular, it is the Electrolytic Capacitors used on the motherboard in the Voltage Regulator circuit, that should be paid special attention to.

If you are not familiar with electronic components, nor the Voltage Regulator circuit, the above will look like a foreign language to you.
[Understandable. Not everyone wants, or needs to be a computer 'geek' like myself]

Processor operate with a specific voltage range. This voltage range is very small, and cannot be exceeded, nor limited.
The motherboard voltage regulator circuit regulates the voltage for the processor, and also for other components on the motherboard.

There is more than one Electrolytic Capacitor used in a motherboard voltage circuit. If just ONE capacitor is bad, the processor will not work.

The following is a guide for visual failure of capacitors.
(Electrolytic)

http://www.capacitorlab.com/visible-failures/index.htm

This information will help explain Electrolytic Capacitors, what they look like on the motherboard, and the reason why they fail.

If you find the information is not concise enough for you, or you would like a less detailed explanation, simply state so in a Comment. I'll be glad to explain.

In an additional comment, I'll post a link to information on the motherboard voltage regulator circuit.

If you have any questions concerning anything I have detailed here, or would like more of a breakdown, simply state so in a Comment.
JCV