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HP 873N CPU fan error

CPU fan error and system shuts down. I have previously had the fan replaced, only to have the error occur a year later. Could the issue be mother board related? Also can you suggest where I can look for a replacement fan? Thx...

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Yes, It is possible to be a board problem much more likely to be a dust /dirt problem. I have not found anywhere to purchase the CPU fans by themselves.Would obve to be wrong on this one; seems that they are sold along with the heatsinks. My favorate is : Newegg. com  but another is:

All you will need to know is your CPU  socket number. You can look that up in tghe manual:
I provided a link to the HP manual for you computer below. I beleive,once opened , you wil see the dust and dirt which may have caused a failer of the CPU fan. Filters are available for the same websites as the fan/heatsinks.〈=en&cc=us

Posted on Feb 13, 2009


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My HP 8710W shuts down when overheated. Usually when playing games. To overcome this, sometimes I let the part of the laptop where the power supply input is located, to stand out of my desk, so that it...

I had similar problem on my HP 8710p and eventually fixed it. Here is how.
First I had a normal overheat situations twice due to clogged dirty fan vents over a period of 4 years. You notice this when the vent cooling fan stays on most of the time, unlike when it was new, even while idling, and of coarse one is reluctant to break open new a PC. After eventually cleaning the fans the problem was resolved but the PC was actually operating at slightly higher average temperatures as the cooling fan would switch on more often that it did when it was new. This is so suttle it did not concern me at the time me until eventually after 18 months, a mere boot would send the cooling fan into frenzy of cooling mode and usually switch the PC off before a full boot could be achieved.(and yes my cooling fins were spotless as I cleaned these once a month at this point).
System reboots were a nightmare as I would have to wait for 30 mins for the CPU to cool down. Eventually I lifted my keyboard on the left side and slipped a small 5 volt fan onto the processor. The fan was powered by a USB port. This worked great but directly cooling the CPU also meant directly depositing dust directly onto the inside of your PC which had to be cleaned with compressed air at least once a week. That was besides the fact that I had to contend with a lop-sided keyboard because of the fan height.
After a year of this I finally I decided to rather try replacing my CPU as I had run out of options. While searching eBay I discovered that CPU cooling apparatus'us were sold in conjunction with CPU's so I decided to buy the cooling apparatus first as a replacement CPU was pricey, especially for an older PC. Skeptical about about my decision, I replaced the CPU cooling apparatus.
To my amazement the problem was solved. Where before I could not even touch the copper tubing near my CPU with my bare finger, now it was cool, probably no more than 30 C and booting was silent. Needing to be sure of this, I replaced the previous cooler and the problem returned, the CPU cooling apparatus copper evaporated spit near the CPU and miraculously cooled down to a room temperature on the fin end.
This was difficult to understand because copper is a very good conductor of heat and here clearly was a situation where the one end of the copper tubing was hot enough to boil spit and the other was at room temperature.

So what can cause this? I am not sure exactly but its not mentioned any where on the Internet as a fix, Not even by HP themselves.
I suspect initial over heating may have messed with the internal climate system in the copper tubing to the extent that the coolant dissipated, probably due to high pressure. The faulty cooling apparatus did not demonstrate any signs of ware and tare, actually the replacement cooling apparatus looked worse than mine as the copper had lost its sheen. I also examined the faulty apparatus from close up for any possible cracks and holes and found nothing visibly wrong. All I had to go on is that the replacement worked and mine did not.
My CPU now peaks at around 50 C when number crunching and the cooling fan is seldom activated. The copper tubing is warm, but not hot, right up to the area where the CPU is located. My system runs so quiet now it has a feeling of newness about it. That raises another question, modern PC's have normally have self preservation software coded into their BIOS that prevents or slows down the CPU clock speeds when over heated or running on battery. The battery part is to conserve power but the heating part is to not do irreparable damage to the CPU. This feature is usually referred to as "dynamic clocking". A hot CPU will run at the slowest possible speed it can function at, (beyond this it will be shut down) at a time when you are trying to crank every bit performance out of it. So it goes without saying my PC now runs faster and appears to be more responsive, just like the day I bought it.
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My PC was headed for the trash heap. (I am a developer, not a gamer) but now it will stay. Its reliable, trustworthy and never had a problem besides the cooling issue.

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If your machine shuts down randomly there can be only 3 possible solutions to this one:
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  2. Your CPU is overheating, caused by a broken or unresponsive CPU heat sink fan, which causes your pc to shutdown (will always auto- shutdown at a certain temperature to prevent damage to the CPU. Check if you can feel "air" coming out of your laptop, suppose to be a hatched outlet at the side or at the back or on the top cover.
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