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Compaq Presario S5000NX

My computer keeps restarting without any warning.I changed heatsink and fan, power supply. Could it be my processor going bad?

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  • Donna Nov 25, 2008

    I can not enter the bios. I only have one fan detected. It is the one on the heatsink because if I unplug it the rpm's go to zero. I cleaned the heatsink again and applied the thermal paste. The fan in the power supply is working. There is nothing in the event viewer. I am at a dead end. The only other thing I installed is memory alittle over 2 years ago. Would this be the problem? This has been going on for sometime. It might work for a day, a week or a month, then it will start with the restarts again. Thanks for any advice.

  • Donna Nov 30, 2008

    I added the new memory and maybe a few months later it all started. But what confuses me is it used to do it every now and then, now it is doing it all the time. I added a new heatsink and fan wen I did this the speed fan now says fan1 2558 rpms temp1 45C fan2 0 rpms temp2 86C HD0 30C. I cleaned the memory as you said and it is still doing it. The specs. for my pc says the memory speed is 2100 when I took it out it said 2700 so I purchased the 2700 could this be the problem?



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Hi Donna,
I'm not asking you to unplug the CPU's fan while the system is running!
(That would be a bad idea & the system would over-heat for sure).
The fact that you are not able to enter the bios is a major factor & you should have posted this.

So far this is what I do know. Memory was added to the system.
You can not enter the motherboards bios menu. Your old CPU fan was running at 1713Rpm, temp 46C which is, 114.8 Fahrenheit & you cleaned the CPU fan & assembly.
Than remove the heat-sink & fan assembly & applied new thermal grease.
(Guess the video's helped)?
Now tell me. Did the problem - (System restarts), did this start happening shortly after you added new memory onto the motherboard?
This is what I want you to do. Gather up a couple cotton swabs & a bottle of house hold alcohol. Unplug the power cord from the PC. Open your case. There are two memory slots on the board. You said you added memory 2 years ago. Carefully remove the memory from their slots. Look to pages 102-104 in your user manual for instruction on how to remove & install your memory. If you no longer have your user manual you can download it & print it out from this link:
You will also need Adobe PDF reader to view the manual, which can be download for free at Adobe's web site:

Once the memory has been removed take a cotton swab & place a couple drops of alcohol on it.
(Not dripping wet). Wipe the memory’s contacts/ each side both sticks. (Do not touch the contacts with your fingers). Use canned air & blow the memory slots out. If you do not have canned air you can use a powered sweeper with the brush attachment to clean the memory slots out. Than re-insert both DIMMs back into their slots. (Press firmly down while "slightly" rocking the memory left to right as you push down until both locking ends snap onto the memory). Before you close the case, I want you to check every connection in the case. Any one data cable or power cable could be loose.
If in doubt of a solid connection, unplug & re-connect carefully but firmly.
I'm pretty sure your system is not restarting because of the CPU but rather a loose connection or dusty / dirty memory, poor connection & bad or too weak of a battery. Normally I would suggest clearing the cmos/bios jumper on the board but Compaq does not provide the motherboard layout in the user guide. The battery on the board. Is about the size of a quarter. The average battery life is five years. This Compaq was built Aug-2003. One can remove it & check its voltage with a volt meter. It should hold 3volts DC. You can buy a replacement online or ask a friend that owns a volt meter to check the battery. Here is a picture of the battery:
Compaq Presario S5000NX - 8ee2615.gif

When finished, close the case & plug the power cord in.
That second fan in the system is not connected to the board & that is why there is no speed reading coming up with the software you installed. (This is ok). (Use a small clean paint brush to wipe the fans blades from dust build up, (both sides).
I'll provide Compaq's link for your Presario S5000NX DM171A. (Drivers & software):
Never know when you might need a driver.
Need to buy a battery:

Well this should fix the re-start issue. Take your time.

Post if the problem persist........

Good luck Donna!

Posted on Nov 25, 2008

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The power switch can get weak and let the contact touch slightly which will cause restarts just as XP is starting up. I just bang on the switch a few times to stop the restarts.

Posted on Jan 05, 2011

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Hi jdgunderman, I read you previous post about this issue:

Your CPU fan was running too slow. Now I see you mentioned you've replaced the heat-sink & fan assembly altogether. I have to ask you! Did you remove the old thermal past from CPU? The old thermal grease must be removed. If your new heat-sink came with thermal tap on its bottom side, you'll still need to remove the old dried grease or thermal tape from the CPU. If you did not remove the old from the CPU it can & will over-heat. I doubt your CPU is going bad. (CPU's do not usually go bad, it's more like its good or dead).
I do think it's not getting enough of fresh air. Let's move on to what you need to do. You're going to have to remove the heat-sink & fan assembly. Next, find your self a nice soft clean cloth/rag. Dampen the cloth with house hold alcohol. Wipe all old thermal tap or grease off the CPU & the heat-sink. (Do not scratch either surface)! Once totally clean replace thermal grease on to the CPU & reinstall the heat-sink & fan assembly . Included below is a utube link to help you see how all this is done:
If your system continues to shut down you can add an external 3" case fan to the left side of the case.
Enter your bios & find the section for your CPU. See if any of the settings are set too high, like fan speed. If the fan speed is set too high the system will shut down. CPU fan setting should be set to no less than 1900Rpm.

Good luck jdgunderman!

Posted on Nov 24, 2008

  • Mike Peluso
    Mike Peluso Nov 30, 2008

    Hi Donna,

    Your memory is ok.

    The FSB = Front Side Bus runs at 400MHz. It should be able to run the PC2700 memory which runs at DDR 333MHz.


    I am no longer concerned with the speed of the CPU's fan. Lets use my own system as a reference. My CPU fan runs at 3292Rpm. My CPU's temp is at 34C. Your system temps are within reason for the CPU & HD0. So now there is one item left to check & that is the hard disk drive. Your system restarts may not be from system over-heat. Since you are able to get into your windows from time to time, (Your able to run the speed fan program). Make a change in windows. Left click the start button once, slide up to My Computer & right click one it once. Left click once on Properties. System properties window will open. Left click once on the Advanced tab. Click the Settings button under Startup and Recovery. Startup and Recovery window will open. Under System failure, left click once on the green check mark next to, Automatically restart. The green check mark will go away. By doing this you will force windows to display an error message before it does a restart. So keep a pen & paper close by. It may take a few restarts before windows gives up the error. Once done, include it in your next post.



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Won't start but CPU fan vibrates but will not go full blast. Intermittant

It appears you have a faulty CPU fan and it is causing the CPU to overheat and shut down.
I suggest you replace the CPU fan. remove any dust from the heatsink and put new heatsink compound on the CPU/heatsink.

May 06, 2012 | Compaq Presario S5000NX PC Desktop

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I have a compaq s5000nx that keeps shutting down and restaring after 20 min have not done any thing to it


Open the case and blow any dust out of the heatsink (under the cpu fan). Overheating is the main cause of sudden shutdowns. You may also want to apply fresh thermal paste between the cpu and heatsink. Please let me know if this helps or not.


Apr 17, 2012 | Compaq Presario S5000NX PC Desktop

2 Answers

Compaq presario sr2030nx won't boot. The fan

Bad Power Supply.
Weak Voltage power rail.

I'm going to explain what is wrong, and why.

Power Supply's are rated in Wattage.

The Power Supply used in a Compaq Presario SR2030NX desktop computer, is a 300 Watt unit.
(ATX style)

1) ALL the lights 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 SR2030NX uses an AMD Athlon 64 X2 3800+, processor,

The AMD Athlon 64 X2 3800+ processor can use Up To 89 Watts, (Windsor Core)

(HP Support lists the Processor as an Athlon 64 (O) 3800+.
The (O) should be an X2)

This means your bad Power Supply has enough power to light lights, and spin fans, but not enough to turn the Processor on.
No Processor running, No computer.

Bad Voltage power rail.

Inside the Power Supply are Electrolytic Capacitors.
Electrolytic Capacitors can break down.
The capacitors are used as Filters.

They filter the incoming AC electricity (Input Stage), and the outgoing DC electricity made by the Power Supply. (Output Stage)

(Observe the photo to the upper right of the page. The photo can be enlarged by left-clicking on it. It can be enlarged twice)

Electrolytic Capacitor simplified construction:

The Electrolytic Capacitors used in the Power Supply, (And on the motherboard), of a Compaq Presario SR2030NX, are Aluminum Electrolytic Capacitors, which are of the Radial design.

Observe the two photos of capacitors, shown at the upper right of the page.
The Electrolytic Capacitor example shown at the bottom, of the bottom photo, is the Radial design.
(Short blue capacitor)

The case of the capacitor is an Aluminum 'can'.
Inside the aluminum can are three strips.

1) One strip is an aluminum foil, and is the Conducting strip.

2) One strip is an aluminum foil, and has a non-conducting medium applied to it.
This is the Non-Conducting strip.

3) The last strip is a paper-like medium, and is soaked with Electrolytic paste.

The paper strip soaked with Electrolytic paste, is placed in-between the Conducting, and Non-Conducting strips, and all three strips are rolled up tightly.

(The Positive lead of the capacitor is attached to the Conducting strip. The Negative lead is attached to the Non-Conducting strip)

When a capacitor breaks down the paste inside develops a gas. (Hydrogen gas)
This gas expands inside the case of the capacitor (Can)

At the bottom of the 'Can' is a seal. It is a synthetic rubber like material, and is shaped like a flat disk.

The top of the 'Can' has a shape etched part way into it.
The shape is commonly an X, or K.

When the gas expands, and develops enough pressure, either the seal at the bottom is compromised, And/Or the etched shape breaks open, to relieve the pressure.

The Electrolytic paste is pushed out.
So much paste loss, and the capacitor operates at a weakened state.
To much paste loss, and the capacitor fails.

A Capacitor as a electronic component that slowly develops a charge, then releases it all at once.

You may compare it to a large swimming pool being filled up by a garden hose, then one wall of the swimming pool is taken down all at once.

This is why the Power Supply worked when you unplugged it for a while, then plugged it back in.

The weakened capacitors paste chemical composition, allowed the capacitor/s to revert back to a working stage once power was removed.
(Power Supply unplugged from power)

When you plugged the Power Supply back into power, the capacitor/s were working again.
Worked with so much paste loss.

Eventually enough paste was pushed out, and the capacitor/s have failed.

What causes Power Supply failure?

1) The inside of the computer is dirty, as well as the inside of the Power Supply.

The cooling components of Power Supply is it's fan, and Heatsink's located inside the Power Supply.
[Refer back to the photo of the open Power Supply, in the SMPS link]

(A Heatsink is a component, that draws heat away from another component.
Typically, a Heatsink is composed of a flat metal plate, that has tall, thin fins protruding from it.

Heat is absorbed into the flat metal plate, whereby it is absorbed into the tall, thin fins.
The fins radiate the heat away.

When a fan is used in conjunction with a Heatsink, the air produced by the fan goes in-between, and around the fins, and helps carry heat away)

When the fan's blades, center hub, and surrounding cage are dirty, and the Heatsink/s are dirty, the cooling capacity drops tremendously.

Again, Heat = Wasted Energy.
The Power Supply tries to keep up with the call for power, and eventually components inside the Power Supply fail.
Electrolytic Capacitors are the weakest link, and typically fail first.

2) The computer manufacturer used a cheap quality Power Supply.
Cheap quality components used inside the Power Supply.

If you wish I can guide you in testing the Power Supply.
You'll need an inexpensive multimeter, or an inexpensive power supply tester.

(One example of an inexpensive power supply tester, )

Or if you have a KNOWN to be good, compatible power supply, you can use it for a test unit.

Need help in finding a replacement Power Supply, or information in how to replace it, simply state so in a Comment.

Jun 02, 2010 | HP Compaq Presario SR2030NX PC Desktop

1 Answer

My hp compaq 615 always restart after an hour and some minutes

Posible over heating issue, (issue with the fan, processor or heatsink)
>Overheating triggers auto-shutdown to protect the CPU
>Memory module going bad;
>Power supply going bad.

Computer usually shuts down if it is over heating so it won't melt down. There is a command on how to disable the auto shut down but it may affect your computer badly.

please check this thread for further troubleshooting

on other view

I would suggest to reformat your computer first before dealing with the hardware issue to avoid part replacement.

Mar 27, 2010 | HP COMPAQ Presario SR5510F Athlon 64 X2...

1 Answer

My computer cuts on but fan is going very fast and my monitor will not cut on if i turn it off i have tried hooking monitor to another computer it works fine. i have a compaq presario sr1703wm

Need a little more info please. First do you mean the computer stops working and the power supply fan is loud or is it the processor fan. Because if its the cpu fan then the processor maybe over heating. Make sure that the processor heatsink is on correctly and if needed put some thermal grease to help disapate the heat of the processor to the heat sink. Two possible faults cpu has overheat or is faulty or sensor on the system board is sensing the wrong temp and is shutting the system down. Both tyhese faults need parts hard to tell the difference without spare cpu.

Dec 19, 2009 | E-Machines T3958 (827103050974) PC Desktop

3 Answers

Switching on but only stays on for a couple of seconds before going blank. If switched off and on it will come on but only stay on for 2/3 second,

Most of the time, owners never clean out the inside of their desktop computer, nor have it done.

Hardware components inside the computer, need a steady supply of air rushing over them, to keep their temperature down. The main hardware component that requires this, is the Processor. If the processor becomes too hot, it is turned off. (BIOS program turns it off)

Without the processor running, there is no computer.

The processor has a Heatsink, and Fan, (Sitting on top of the heatsink), to draw away the heat given off by the processor.
The heatsink is a finned piece of metal, attached to a metal base.

As heat is given off from the processor, it is drawn into the base of the heatsink, and radiated out by the fins.
If the fins become clogged with dust, dirt, hair, and other foreign material, the cooling capacity of the cooling system, drops tremendously.

If the fan blades, center hub, and outside cage of the fan, become clogged with foreign material, the cooling capacity drops termendously.

This in turn, allows the processor to heat up beyond it's thermal operating range, and the processor is turned off. This is a Fail Safe option that is built-in, to keep the processor from burning up.

This is also why it is imperative to keep the heatsink, and fan clean.
Solution for this is to remove power to the computer, (Unplug the computer from surge protector), open the computer case, and use a can of compressed air for computers

There is a Thermal Paste compound in-between the Heatsink, and the Processor. This could have dried up.
The bottom of a Heatsink, and the top pf a Processor have rough surfaces. This cannot be seen readily by the Human eye, but can under magnification.

When the two surfaces, (Heatsink bottom, and Processor top), are mated together, there are Air pockets in-between them, or Voids.
The Thermal Paste fills these voids, and allows better heat transference.
Solution for this is to remove the old thermal compound, and apply fresh thermal compound, (Paste)

The rest of the inside of the computer, needs to be kept clean also. Dust and dirt, are 'magnets' for static electricity. Static will fry out delicate computer hardware components. (Can of compressed air for computers)

Also the Power Supply. The Power Supply has it's own fan to keep it cool, and this fan's blades, center hub, and outside cage, need to be clean. The inside of the Power Supply should be clean also. There are heatsinks inside a personal computer power supply.
(Can of compressed air for computers)

The Dell Dimension 2400 has been around for quite a while, in computer rated time. Came out in 2004.
If this is the original power supply, the power supply could be bad.

Electroytic Capacitors may have gone bad. Rectifier bridge, and also IC's.
Solution is to replace the power supply.

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My Compaq Presario F730US keeps overheating the fan does not run properly what docking station do you recommend me to buy

I would recommend cleaning out the vents and geatsink grills with compressed air. I would then remove the heatsink unnit and replace the thermal grease on the heatsink and processor. Most laptops do not need any additional cooling if thier heatsinks are free of dirt, dust and debris. The compressed air can be bought at office supply chains. Just use short bursts of air and clean all the compartments including the cd tray. Just make sure to power down the laptop first and remove the battery.

Oct 05, 2009 | Compaq Presario F730US Notebook

1 Answer

Dell XPS 200 Computer shuts off leaving blinking amber light

3 most common solutions to your problem are:
  1. Bad power supply; once it heats up will quit without warning
  2. Bad heatsink/fan; processor heats up and will lock up your Pc
  3. Bad motherboard
Try opening the machine and give the inside a thorough cleaning, paying special attention to the heatsink and fan. Once clean and you've ensured the fan is operating, put it back together and see if your problem is fixed. If not, a new power supply will likely fix your problem. Best of luck.

Jul 06, 2009 | Computers & Internet

1 Answer

My computer keeps shutting itself down without warning. I have live one care which prevents virus to pass through the system but the computer will stay on for a little while then shut off then stays on for...

It is possible this is caused by overheating. Check the power supply fan first, probably in the back of your computer tower. Do you feel any airflow? If so, the next thing to check would be the CPU fan/heat sink. Many motherboards have a temperature gauge software nowadays, or you can download one for free online to see how hot your CPU is running.

2 Possible solutions:
  1. Replace Power Supply if there is no air flow.
  2. Put in a new Processor Heatsink/Fan

Mar 12, 2009 | Computers & Internet

2 Answers

Comp makes a buzz noise and wont show any start up

Suggest you,

A) Look at the back of the computer at the Power Supply fan, and tell me if it's spinning. (Where the power cord plugs in, is the Power Supply)

B) Open the computer case, look at the Processor fan, and tell me if it is spinning.

Also is the computer dirty inside, as well as inside the Power Supply?

DO NOT touch anything inside the computer until it is unplugged from power, and you have followed Anti-Static precautions.

From there I would diagnose the Power Supply. The Compaq Presario s3310cl desktop computer, came with a generic wimpy 200 Watt power supply.

HP Support > Compaq Presario s3310cl desktop computer > Specifications,

Back when the Power Supply was made power supply manufacturers were 'fudging' the actual maximum Wattage rating.

True Wattage rating is more like 60 percent of what is stated.
120 Watts.

My belief at this point of the diagnoses due to your brief statement, is that the computer is dirty inside, and the Power Supply has gone to the great power supply graveyard.

(Bad Power Supply)

Even if the Power On LED is lit, fans are spinning, and the Power Supply fan is running, you may have a bad Power Supply.

Weak Voltage power rail.

1) ALL the LED lights 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.
(General statement. Older CPU's use less power)

The Compaq Presario s3310cl uses an Intel Pentium 4, that fits in a Socket 478 processor socket, and at maximum capability, operates at a 2.53GigaHertz frequency rate.

When operating at the maximum frequency rate it can use up to 61.5 Watts.


(sSpec Number - SL6D8)

2) Socket 478 processor socket,

(In the HP Support Product Specifications, it's listed to the right of the heading - Processor Architecture.
mPGA478 )

No Processor running, No computer.
No computer operating = No Signal on the monitor, or a black monitor screen.

The SMPS in your computer (Switched Mode Power Supply) has two cooling components.

1) The Fan

2) Heatsink's used inside.

Typical construction of a Heatsink, is a plate of metal with tall, thin fins protruding from it.

The plate of metal absorbs heat from whatever object it is placed against.
The tall, thin fins then absorb the heat from the plate of metal, whereby the fins radiate the heat away.

If a fan is used in conjunction with a Heatsink, (Such as a Power Supply, or Processor for example), the air flow from the fan helps to carry heat away from the fins.

Heat = Wasted Energy

The more heat developed inside the Power Supply, the more the Power Supply strains to keep up with the call for power.
Eventually components inside the Power Supply fail, and the Power Supply itself fails.

Doesn't take very much 'Gunk' on the fan, and Heatsink's inside the Power Supply, to make the cooling capacity of these two cooling components, drop tremendously.


Basic typical construction of an SMPS, is shown to the upper right of the page in a photo.
You can left-click on the photo to enlarge. You can enlarge twice.

This is NOT, I repeat NOT, an advertisement to open the Power Supply!

If there are any Electrolytic Capacitors that are still good in that Power Supply, they can release their charge to you!

Electrolytic Capacitors are designed to slowly build up a charge, then release it all at once.

You can compare them, to a large swimming pool being filled up slowly by a garden hose, then one wall of the pool is taken down all at once.

Once power is removed from an Electrolytic Capacitor, (Such as unplugging a Power Supply from power), they can hold a charge for weeks, months, or sometimes over a year.

If your finger/s, touch the terminals on the bottom of a Radial Aluminum Electrolytic Capacitor, the charge could be released to you!

If your finger/s, touch a circuit that one, or more Radial Aluminum Electrolytic Capacitors are in, the charge could be released to you!

The shock can range from Bad to FATAL.

[Anti-Static precautions:

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

Work on a table. Computer unplugged from power, computer case open.
TOUCH the metal frame of the open computer case to relieve your body of Static, BEFORE you reach inside. (Not shouting)

If you get up in the middle of working on your computer, and walk away, upon your return be Sure to touch the metal frame again ]

You can reply to me by clicking on Comment.
Believe upper right of your page.

May 15, 2008 | Computers & Internet

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