Question about HP Pavilion 753n (P9852AR#ABA) PC Desktop

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How do you remove the processor cooling block.

I need to replace my power supply in this machine, and to do so I have to move the monsterour cooling block on the processor. I can't for the life of me figure out how to get this thing unlatched. It looks like you would simply press down and away on the metal tabs, but it won't budge. Any ideas?

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  • 240 Answers

This is a very old machine, close to 10 yrs (approximately). I cannot find a picture of it with the access panel removed so I have to go on gut here.
First, the latchings of the CPU heatsink & fan will vary from year to year and even between models. Some computers have the CPU physically riveted to the motherboard and it cannot be removed. If you break the seal between the bottom of the heatsink and the CPU (immediately below it) you will have to clean both sides to remove the thermal grease, re-apply fresh grease and remount it when done. If you have never done this, do you homework first because you can blow the processor if done incorrectly. At best the unit will not power up. Next, I have worked on a lot of these old units that come across my bench and never saw one yet that necessitated the removal of the heatsink to remove the power supply and I have worked on a lot of them. But without a picture it's difficult to give exact advice.
The latches all work on basically the same principle: the heatsink mounts on a frame almost touching the CPU; there is usually a cross bracket running across the top, and down to the latches on either side. Usually a screwdriver is used to press down on one side and the "hook" disengages from the frame thus freeing the heatsink and fan assembly. Now you must be careful. Over years the thermal conduction grease dried and hardens, "gluing" the heatsink to the processor; if you just rip it off it may tear the CPU off the mounting frame and damage it. So you have to "work" with it, a slight, gentle "rotation" pressure side to side with a gently pull, and sometimes that doesn't even do it. Then a safety razor blade worked underneath may loosen it enough for removal. It gets dicey. Again, without pictures I am flying blind.
I suggest that you may want to go to www.suggest-a-fix.com for more in-depth help, that (free) forum is more suited to this kind of thing than here. I hang out there and can help you further. Wish you the best in your project!

Posted on Mar 30, 2014

Testimonial: "Thanks, Rich. Yes, it's an old machine, but I need XP to run a scanner that will scan large transparencies. There isn't a Win 7 update because it, too, is old with no affordable replacement. This CPU doesn't have a fan as part of the assembly. I'll check out the other forum. Maybe I can post a picture."

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sparky1500
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SOURCE: well i have a compaq

you can use these processors:


AMD Athlon 64 (3000+ - 4000+)
AMD Athlon 64 FX (51 - 60)
AMD Athlon 64 X2 (3600+ - 4800+)
Some AMD Opteron 1xx series
Some Sempron 3x00+ (Step E3,

any standard wopeer supply will do, and you will need a more powerfyul power supply for a mre powerful graphics card.

you can get any pci-e card. an nvidia 9800gt used to be the 2nd best graphics, but its now the minimum card for gaming. I wqould reccomend a 9800, or at least an nvidia gtx260. the higher the numper, per series, and the 4xx and 5xx series are btter than the 2xx. be sure to check the graphics card for reccomended power supply rating.


for the ram, you need pc3200 DDR ram(DDR-400) or higher DDR ram, not compatible with ddr2 or ddr3.

Posted on Mar 18, 2011

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The smell is the Power Supply.

Typical example of a Power Supply not installed in a desktop computer,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4435072&CatId=106

[ NOTE*
This is not an example of a direct replacement Power Supply for your computer. I would need to know the Model Number of your eMachines to give exact information ]

Bad Power Supply. Weak voltage power rail. (Or rails. There are three main voltage power rails for a Power Supply used in an eMachines desktop computer)

Enough power to light LED lights, and apparently spin fans, but Not enough to turn the Processor on.

Watts = Voltage times Amperage.
One measurement used for measuring the maximum available power output, of a desktop Power Supply, (SMPS. Switched-Mode Power Supply), is to state the Maximum Wattage available.

Typical maximum Wattage available for a typical eMachines Power Supply, usually averages from 150 to 300Watts.

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2) EACH fan uses 2 to 3 Watts of power.

3) A typical Processor can use 51 to 125 Watts of power.
Depends on what Processor it is.

(Note* Intel Pentium II processors use less than 51 Watts)

Solution is to replace the Power Supply.
This isn't as hard as it 'sounds', if you have never performed this procedure before.
I know you can do it.

1) http://www.fonerbooks.com/r_power.htm

2) http://www.videojug.com/film/how-to-install-or-change-my-computers-power-supply

3) http://computer.howstuffworks.com/power-supply.htm

If you need guidance in replacing the Power Supply in a step by step for your eMachines, please post in a Comment. (Believe upper right of your page)

Should you also desire recommendations to compare for a Power Supply, I would be happy to provide them.

Regards,
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Without the processor running, there is no computer.

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