Frequent loose contact between heatsink and processor

U can try dropping in another cpu, and removing all peripherals except the memory and see if it recognizes it. If problem persists the anomaly lies within the cmos of the mo bo or the mo bo itself.

If the cpu is now recognized add the peripherals one by one till the problem reappears. The last item you added is causing the hassle.

the temperature show in windows is not right sometimes. enter cmos setup by press del(or f2) open system helth to see the right cpu temperature and voltage. still over heating? you need a better heatsink and don't feget use some heatsink compounds.

Plz check the CPU temperature in BIOS>>Hardware Monitor if it is >70 it the problem with your CPU heatsink fan fixation problem. You need to clean the processor die and heatsink contact with IPA (isopropyl alcohol) and apply small amount of heatsink cement in heatsink fan and reinsert heat sink. Make sure all the heatsink fixing studs inserted in motherboard properly, it can be inspected by the bottom side of the motherboard

Maybe it's wrong with your heatsink;youcan touch this:
http://www.laptopcpufan.com/sony-laptop-cpu-fans-c-7.html

It may be owe to software problem 1, the virus "shock" virus attack will prompt system will automatically start in few seconds. From the remote control you Trojan program all the activities of the computer, including let your computer restarts. Remove viruses, trojans, or reshipment system. 2, the system files damage system files destroyed, as the KERNEL32. Win2K DLL Win98 features, the font list below such basic execution system files destroyed at startup, system will therefore cannot finish initializing and forced the restart. Solution: cover installation or reinstall it. Hardware problem: 1.Chassis power is not enough, dc output is pure, the dynamic response sluggish. Users often ignored or assembling businessman, using cheap price of power supply, so is the largest system of automatic restart suspicion. (1) the power output power shortage, when run large 3D gaming occupy CPU resource of software, the CPU needs power supply, power is not caused by overload protection, stop the power output. After the output power to stop, load, reduce power restart. Due to the protection of the recovery/time is short, so we are hosting automatic restart. (2) power dc output is pure, pure dc power supply of digital circuit requirements, when the power output of too direct, the harmonic content will result in digital circuits, performance is often work to crash or restart. (3) working load of the CPU is dynamic, on the current requirement is dynamic, and the dynamic response speed quickly. Request Some of the poor quality power dynamic response for a long time, could also lead to crash or frequent restart. (4) high-end graphics update equipment (large disk/video card/equipment (increased), after the hard disk) / burners, power supply of original beyond rated output power will cause the regular crash or restart. Solution: now in high quality high-power computer power. 2.The memory chip thermal stability, incorrect or damage to restart the system memory problems to restart the system of risk. (1) the poor thermal stability of memory, boot can work normally, when the memory to a certain temperature, temperature is can not work normally, which leads to crash or restart. (2) memory chips, slightly damaged, also can pass on self into the system, when the operation can be some big software throughput will restart or crash. Solution: replace memory. (3) memory of CAS value too small can also lead to instability caused by system memory, automatic restart. General had better use the default Settings, don't roll change yourself. 4.The CPU temperature exorbitant or the cache damage (1) the CPU temperature exorbitant often causes protective automatic restart. The basic reason of high temperature is due to poor cooling chassis, CPU, the CPU is undesirable reasons: the heat radiator thermal conductivity low, radiator material with a foreign body between CPU interface (1) for quality assurance, fan speed is low, the fan and radiator dust too much, etc. And P2, P3 motherboard CPU temperature probe damaged under the mp4 or within the CPU temperature detection circuit on the mainboard damage, the BIOS BUG in a special conditions of temperature, the CPU CMOS setup to protect low temperature, etc. Can also cause protective restart. (2) of an internal CPU, level 2 cache damage is CPU common fault. The extent of damage, or can start, when running into the system, the software (some throughput big media player, games, 3D graphic) will restart or crash. Solution: in the CMOS setup of shield (L2) or level 2 cache cache (L1), 1 or replace the CPU. 4.AGP display, PCI CARDS (nics), cat restart automatically (1) the external card or poor quality work not standard, AGP/PCI bus signal misoperation cause system RESET to restart. (2) and graphics, loose network system may cause restart. 5.Parallel, USB access is serial, fault or the incompatibility of external devices restart automatically (1) the fault or not compatible with the parallel damage, such as printer, a foot of short-circuit, USB equipment damage of short circuit, signal level sutural definition, opaque, etc. (2) hot swaps external devices, shaking, cause signals or power instant short-circuit. 6.Mainboard failure In case of automatic restart motherboard is rare. Generally RESET circuit are associated with a fault, Socket weld is empty, slots, contact undesirable, Individual chip, capacitance elements such as damage.

you might want to replace the CPU fan and re apply a thermal paste between your processor and heatsink. Make sure the heatsink and CPU fan is securely in place to avoid thermal problems

No thermal grease or old dry thermal grease and a dust and debris filled heatsink is your most likely cause of this problem. Dell isn't very overclocker friendly...it is more likely a lack of maintenance in blowing the dust out of the case on a regular basis. Take the case panels off and use dry compressed air to blow the system out and clean it thoroughly. The heatsink needs to be removed and the hold down latch on the processor needs to be removed and the heatsink and processor need to be wiped clean and a new thin layer of thermal grease applied to the processor. Put the system back together and fire it up.

Hi ,

Many has this problem.
1. The main reason behind this problem is that your system is experiencing "system failure".

To overcome this problem,
First Go to start->right click my computer->click the advanced tab, go down to startup and recovery-> uncheck the "automatically restart" box.

Now your computer will not restart while experiencing the "system failure". Instead of the restart you will get an error message which can help you diagnose the source of this problem .

2. The other reason may be the power supply(SMPS). Make sure that sufficient power is provided for all the parts of the CPU.
For eg: If you are having any high end graphics card, that will consume more power and there are chances that the power supply will get educd to other parts.
So make sure you have SMPS( power supply) sufficient enough. Also you can try with higher power SMPS.

3. It may also be due to the heat produced that you might want to look into that, check in the bios setting for you temperature right after the computer shuts down. You might need a better heatsink or more fans in your case.

4. It might also because of virus ,so try an updated antivirus and scan your system.

If removing the black powder was damaging to the processor then your system wouldn't start at all.

If I am interpreting this correctly, your PC is only hanging when you restart. It sounds like what you did was pull the heatsink and fan off of the processor and you wiped away that black powder/smudge junk that OEM vendors such as HP use as thermal material between the heat sink and processor.

Some systems do that. It's to be expected. It COULD be caused by a temperature sensor detecting higher temps, though. (Although that's not likely if it's still starting when you shut it down completely and then start it back up.)


The first thing you want to do is re-seat the CPU in it's socket. I don't know what kind of CPU you have so I don't know what kind of socket it is. Be careful in doing so and if you don't know how to open and close the socket then do a little research online for some instructions; or come back here and tell me what kind of CPU you have.

After re-seating the CPU correctly, you want to be sure to clean the die of the CPU with some kind of solvent (such as alcohol) to get rid of any grease or random chemical build-ups. If there is still sticky residue on the CPU from the thermal material, you can normally get rid of that using a bit of WD-40 on a cloth. (DO NOT APPLY ANY CHEMICALS DIRECTLY TO THE DIE OF THE CPU. PUT IT ON A CLOTH FIRST.) If you use WD-40 to clean the CPU die, use alcohol to clean up the WD-40 afterwards.

Do the same to the bottom of the heatsink. Apply WD-40 directly to the bottom of the heatsink if you like. It tends to eat away all of the sticky junk well enough that you can just scrap it off. Clean the surface with alcohol afterwards.

Get yourself some thermal paste from either Radio Shack or an online store. (Radio Shack is currently selling Arctic Silver thermal paste. Good stuff.) Apply just a SMALL DAB of it to the die of the processor and spread it around until you have a nice, thin and even layer of it. (You don't need a ton of it on there.)

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OPTIONAL STEP FOR BETTER RESULTS:
If the heatsink is rough on the bottom of it, you can buy sandpaper and sand the bottom of it flat and smooth on top of a flat, glass panel. Make sure to give it a good, smooth finish with a fine sandpaper. This will give it a good, flat surface to make contact with the CPU and will help thermal transfer a great deal. Clean the heatsink and apply it to the top of the CPU carefully.
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MAKE SURE THAT THE HEATSINK IS NOT FACING THE WRONG DIRECTION WHEN YOU PLACE THE HEATSINK ON THE CPU AGAIN. If you do, it may actually sit on the socket that the CPU is in rather than on top of the CPU itself. If you turn it on like that, you may burn the processor.

Lock the heatsink down onto the processor as normal.

That junk that OEM vendors put on CPU's should be banned. It's better than nothing...but not by much. They tend to use junk heatsinks and even worse thermal transfer material.

I doubt you damaged your CPU by taking off a little bit of the thermal material like that. However I'm not saying that it's not possible, either. It most likely just got a little bit hot afterwards if anything.

At the very least, clean the surface of the heatsink and the CPU and put some thermal paste there between them. Things should run fine after that. But if your system continues to hang on a restart, then I wouldn't panic. Mine does that sometimes. No big deal. I just shut it down instead of restarting it and turn it back on.

Either way... If you follow these instructions and have a better cooling situation, you're going to experience a bit more stability and possibly better performance with your system.

Let me know how it goes.

Cyryl

I'm sorry to tell you but your cpu has probably fried. Your pc hanging a lot probably meant something was overheating and the fact that you say your cpu is not hot when you have the cooling fan off of it means it is probably the cpu. When you first turn your system on without a cpu cooling fan, the cpu should be slightly warm, although I do not recommended running a cpu at all without a cooling fan or even touching it when it has power.