Question about HP Pavilion A520n (DW233A#ABA) PC Desktop

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Computer will not boot up.

I accidently left my computer running for too long in a place where the cooling fan could not operate efficiently. Now I can't get the thing to boot up. The power supply seems to be fine, because lights and indicators still work. How big is my problem?

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  • nsindian
    nsindian May 11, 2010

    laptop or desktop?

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Try booting desktop into safe mode by tapping <F8> as computer is turning ON. Keep tapping until you get to the Advanced boot Menu then select Safe Mode. Once logged into safe mode access your device manager by entering in Run command - devmgmt.msc

check for any issues with hardware

Posted on Jun 10, 2008

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  • HP Master
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Its either the board or the processor, or possibly both of this.. but first try to remove all the hardware which all attached the cpu, and put it back on after an hour.. clean each parts..

let me know here again..

Posted on Jun 10, 2008

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1 Answer

What's your problem?tower fan is always running off and on


Your computer's Processor/CPU fan is set to run faster when it is hot and slower when it is cool. That is why it get's quiet and loud. A clean may reduce the noise, by removing the dust from the computer system the fans will be able to operate more efficiently and effectively meaning that they won't have to spin as fast.

Install fans in your chassis to provide your computer system with freash air, an exhaust fan is also an idea to push warm air out of the system. Generally the larger the fan the quieter it will be, as a large fan can spin at a slower rate to provide the same airflow of a smaller unit.

Remember that it is that fan over the CPU heatsink that is keeping your computer alive. Overtime they can wear, replacing the fan is an option.

Take care!
damnor01

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Blank screen on start up


Hi

You say there is a blank screen at Start Up. You do not say if the computer boots successfully into the XP Operating System. Do you see the power LED and the Hard Drive Activity LED working? Can you see/hear the Hard Drive spinning? Ok. Try to eliminate the possibilities, one-by-one. I will assume, since you upgraded the PSU, that you have had the case open and therefore know if dust, dirt and grime would have clogged up the inside of the computer reducing its cooling efficiency and causing it to overheat. If you have not done so already, carefully use a vacuum cleaner with a narrow nozzle attachment.

Make sure the Front Panel Control Header Pins are fitted in the correct orientation.
Make sure the CPU and Heatsink are fitted correctly.
Make sure the CPU fan is connected.
Make sure the RAM is properly in the RAM slots.
Make sure the Graphics Card and any other PCI cards are properly in their slots.

Connect only the CPU Power Cable, the Hard Drive power cable and any Graphics card power cable (if you have a separate Graphics Card and it has a power connector) and, leaving the computer open and flat on the floor so you can see all parts inside, test the computer again.
If it works, shut the computer down; add the CD/DVD drive power cable, and then the case fans, testing as you add each extra device. Upgrade to a 550W PSU if you experience any failure or slow spinning of fans with the 300W PSU. After installing the new PSU, clear the BIOS by disconnecting the power cable and removing the small, silver CMOS battery for 2 minutes and then reinstalling it and then restarting the computer. If the computer boots, you could consider a BIOS update.

A well-ventilated desktop computer base unit has a fan arrangement that sucks in cooling air from a small open slot under the bottom edge of the front control panel and vents hot air extracted from the CPU and generated by most of the internal devices, via (an) extractor fan(s) at the rear. Choosing a good quality, efficient , low noise, large-bladed, multi fan PSU that sucks hot air in from multiple faces and vents in all out via a powerful, efficient, low, noise extractor fan on its rear face. A cheap PSU is a very false economy and worth spending a little extra in return for a disproportionate payoff in terms of cooling, performance and system stability.

Sometimes, positioning the base unit directly on a carpet with a thick shaggy pile, or enclosing in it, during use in a poorly ventilated under desk cubby hole, next to a radiator, or in place receiving direct sunlight, polarised by glass in the nearby windows or some similar place can have a underestimated impact on the base unit's ability to cool itself when in use. Cooling is essential for the CPU, Motherboard Chipset, Graphics Card or onboard Graphics Chip, Hard Drive and RAM Memory. All need to be as cool as possible to work at optimum efficiency and the performance of each suffers drastically when exposed to over hot conditions, particularly the CPU which, from stone cold, can reach the temperature of boiling water within seconds of the computer being powered up and will underperform, overheat and shut down at the merest incidence of over hot conditions.

So review all the salient cooling issues, then consider adding a separate, dedicated, fan cooled graphics card, its GPU Fan adding to the efficient cross circulation of cooling air to more of the interior and, also, its own built-in GRAM freeing up the 16Mb, 32Mb, 128Mb or 256Mb of System RAM that the on-board graphics chip borrowed from the RAM Modules. RAM that has to work less hard, works at a cooler temperature and thus more efficiently. The CPU works more efficiently as it no longer has to compensate as much for the loss of System RAM previously commandeered by the on board graphics, so it also generates less heat in doing so.


Consider also Inexpensive but beneficial, cooling Motherboard Chip and RAM Heat Sinks for the RAM Modules. Inexpensive, underside fan powered Hard Drive Coolers that screw to the underside of Hard Drives. See examples here:

http://www.amazon.com/Thermaltake-TMG-HD1-HDD-Cooler/dp/B000ZM8D4I/ref=sr_1_1?s=electronics&ie=UTF8&qid=1315115079&sr=1-1

http://www.amazon.com/Zalman-VGA-Ram-Heatsinks-ZM-RS1/dp/B0009YIJ2I/ref=sr_1_3?s=electronics&ie=UTF8&qid=1315114910&sr=1-3

http://www.amazon.com/gp/customer-media/product-gallery/B0009YIJ2I/ref=cm_ciu_pdp_images_3?ie=UTF8&index=3

The 550W PSU is necessitated by the extra cooling devices you contemplate installing

If none of the above works, then the Motherboard might either have a BIOS corruption or a power management fault.

A new motherboard might be obtainable from Dell but the price is likely to be prohibitive. Dell often have unique design architecture in their cases that makes it difficult or impossible to install other brands of comparable specification Motherboard.

I hope this helps. If this Answer goes some way towards helping to resolve your Query, Problem or Fault, please take the time to Rate it. This helps Answerers, like me, better understand the needs and the point of view of Askers, like you, and guides us in exploring the best ways to provide the most comprehensive, useful and high quality Responses and Solutions we can. If you need further help, please do not hesitate to post another Question or add a Comment to this Question.

Sep 05, 2011 | Microsoft Windows XP Professional

1 Answer

Does this fan have a brushed motor? Thanks Phil


The Exhaust Fan/Video Card System Fan Kit from StarTech is an add-in cooling fan designed to fit in the PCI or ISA expansion slots of any computer. It is used to exhaust warm air out preventing problems due to overheating components. The exhaust fan inlet faces adjacent PCI or AGP cards and makes a great video card cooler for hot running 3D accelerator cards like the Voodoo TNT2 GeForce256 and others. A quiet running brushless DC motor coupled with a high efficiency blade design is capable of moving 36 CFM (cubic feet per minute) of air. Power is supplied to the fan using a standard LP4
hope this helps

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Compaq presario C 700 fan runs non stop


Make sure the air vents are clear when it is operating, also use a can of compressed air to blow out the dust from the vents and fan. This should make it cool more efficiently and the fan shouldnt run as much afterward.

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I am getting blue screen with error of partmgr.sys. i did clean boot, it was fine for a day but it happen again.


Check the size of Random Access Memory (RAM) in your computer. Its small size could be the reason for this problem as many of today's software need large amount of memory to operate in smooth manner. Additional RAM will also increase the efficiency of your computing particularly for gaming.
• Excessive use of computer or a malfunctioning cooling system can make computer/laptop overheated. Whenever system is heated, its efficiency will go down. BSOD is one possible consequence of over heated system. Keep fan of your computer in fully functional mode.
• Registry is the most vital part of Win 7. Corrupt registry is the biggest reason for BSOD in Win 7. One way is to clean registry manually but manual tricks could wreck your system completely if you are not a top notch computer expert. More appropriate way is to buy a good registry cleaner reginout and PC optimizer

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I have a toshiba and that is exactly what the fan is doing to cool off the processor. That is because when you boot XP the fan stops after 30 seconds is simply it has no difficult operation on it. But when you choose to switch on to Ubuntu your fan doesn't stop is because ubuntu requires more air since it has so much effort on its operation. Mind you when you installed ubuntu, it requires larger video graphics memory than the XP OS. Try to execute more websites on different tabs on your XP and you will find your fan will work overtime because you put much required operation for the processor. But to help the fan cools off the internal devices, place cooling pad beneath the notebook so that your PC will be safe.

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Computer keeps shutting down. It will start up and sometimes work for a while then shut down unpromted. Or if I start it, the computer will just keep shutting down and restarting for no reason. I can get...


That sounds like either a graphics problem or more likely a memory problem. Try taking out a couple sticks of RAM or leave just one in and try that.

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1 Answer

Laptop getting unusually hot in operation


Re: "the FAN runs only when the booting is being done.but it stops as soon as the booting is completed".

That would be normal, as the variable speed fan comes on only when the computer is under load.

What is not normal is that the fan is not coming on when the computer overheats.Or that the fan is not cooling enough when computer is overheating.

Monitor computer temperature using a software, check if Fan is coming up when temperature gets critical.

If fan comes up but does not cool enough, then replace the fan, it is not efficient anymore because of a bad bearing or dust. ~Also ensure that fan is well mounted, if fan has poor contact with CPU surface , cooling will be poor.

If fan does not come up, and critical temp is not detected, then the sensor on motherboard is bad, this is very uncommon.

If fan does not come up and temp is critical, then fan is faulty, replace it.

There are also more than one fan on many laptops, check that one of the fans (CPU fan, video fan) is not completely ded, and therefore cause for the problem.

Here is the software to control your fan and temp state:

Download SpeedFan - Access temperature sensor in your computer

Download SpeedFan 4.38

SpeedFan - Free software download

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The fans in most desktops do run whenever the unit is on. Only high end/ performance/ or self built systems usually have self adjustable fan speeds.

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If you have the original Windows operating system boot disk or can get one via download, try booting off that. If the computer then runs OK, you will need to attempt to format the hard drive.

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