I have a HP M1270N Media Center PC. The CPU Fan

HP Support > Media Center M7050y Desktop PC > Main Support page,

http://h10025.www1.hp.com/ewfrf/wc/product?product=471696&lc=en&cc=us&dlc=en

How to > Adding / Replacing hardware >

Opening the PC Case

Fan 3 tells me nothing

Computer case fan?

Processor (CPU) fan?

http://h10025.www1.hp.com/ewfrf/wc/document?docname=bph07139&tmp_task=useCategory&cc=us&dlc=en&lc=en&product=471696

FOLLOW Anti-Static Procedures with your unplugged from power, computer.

Post back in a Comment.

Regards,
joecoolvette

WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL.

http://www.kitchentablecomputers.com/static.php - rules

First clean your computer of dust you could use a fine air blower from a compressor or a can of compressed air whatever you use make absolutely sure there is no moisture in the airlines

if the fan in your computer is constantly running to cool down the cpu and it is normal for it to increase it's speed, your fan should run quietly even it increases the rpm.

But if you hear a loud noise in the fan, i think there's something wrong with it.

I suggest for you to check the fan if it's coming in contact with anything. If the fan is visible while your computer is operating, you can observe it to know what is really happening.

I don't know what type of fan hp uses on their computers, maybe something is loose already on the fan so better check it or bring it to an hp service center.

http://www.hardwaresecrets.com/article/Thermal-Compound-Roundup-February-2012/1490

make sure your CPU has thermal paste

your CPU might be getting hot making you computers fan to run consistently

hope this helps

If you haven't already done so, have a look at 'Troubleshooting Power Supply Issues' here
http://h10025.www1.hp.com/ewfrf/wc/document?docname=bph06788&tmp_task=solveCategory&cc=us&dlc=en&jumpid=reg_r1002_usen_c-001_title_r0001&lc=en&product=443756
(found by searching hp website for 'm1270n' > Support & Troubleshooting for your HP media centre m1270n Desktop PC > Solve a Problem > Start-up/Shutdown/Power > Power Management - Trouble Shooting Issues > (there's a section titled 'Power Supply Light is On or Flashes)

12.April.2014

http://www.newegg.com/Product/Product.aspx?Item=N82E16835150086 this is a compatible cpu fan and heatsink or you can search ebay and find the oem fan and heatsink quite easily

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Your Fan is Thermal Controlled.... It Will Auto Adjust To Your Temperature..

You Can Rewire THe Fan To A 12 volt Constant Source To Correct The Issue Of THe Fan Not Constantly Running...It will no longer be thermal controlled and it will run all the time... (yellow wires are 12v)

Are you sure it's the power supply?

Most modern power supply units are of the ATX type. Brand should not matter. Your PC used a 300 watt power supply when new. You can purchase a power supply with more output (watts) if you like, but not less. You will have to purchase from a computer specialty store most likely - take the dead one in and compare it side by side with the new one before buying.

There are very few mechanical parts in cpu...some of them are cpu fan. smps fan chassis fan hard disk motor or cd drive.......as you were talking about click...i doubt on cpu fan also clean the processor and coolant as there might be dust in it that prevent the cpu fan to cool down processor this might be causing system freeze....do reply back if this solves your prob

one reason that a CPU fan may be running constantly is that it may not be able to cool the cpu down. usually this could be due to dust or debri clogging the incoming or outgoing vents or even dust accumulated on the fan itself or the heatsink.

Power supply has died