Question about HP Pavilion a1114n Athlon 3400+/1GB/160GB/DV+/-R/RW/XPH (PX748AA) PC Desktop

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I have a problem with a HP Pavillion a1114n. when u press the power button the cpu fan spins up for about 1 second and then cuts off and then the power led blinks on and off continuously

Lots of dust and dirt inside case. Tried cleaning, but it did not help.

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Bad Power Supply.
Weak voltage power rail

The hardware components inside your computer (HP Pavilion a1114n Desktop PC), are cooled by air flow. Heat is radiated away, then air flow helps carry the heat away. (Heatsink/Fan)

The Power Supply is cooled by the same method.
Power Supply's used in today's computers are SMPS.
Switched-Mode Power Supply,

Click on the photo of the open Power Supply, to the upper right.
In-between the letters B and C, and C and D; are Heatsinks.

Look like whitish/grayish rectangular blocks, of varying thicknesses, stacked along a singular flat bar.

The block shapes are aluminum fins.

Whatever this Heatsink is placed against, it will absorb the heat from it, and radiate it away with the thin fins.
Air flow from the small internal Fan, helps carry heat away from the thin fins.

Heat = Wasted Energy
The Power Supply overheats, and cannot keep up with the call for power.
Components inside fail; the Power Supply fails.

A THIN coat of dust on the Heatsink fins for the Processor, will drop the cooling capacity a LOT.

If you would like to test the Power Supply, you will be using the test for the three main voltages;
3.3 Volts, 5 Volts, and 12 Volts. All are DC Voltage.

(In comparison two D cell flashlight batteries store 3 Volts DC.
The dangerous voltage is contained within the metal case, of the Power Supply)

You need a multimeter. An economical model is around $5 to $12.
Available in a multitude of stores. An auto parts store is but one example. Large store chains may carry them on a checkout aisle rack.

Or if there is a working unused computer, that has a KNOWN to be good, and Compatible Power Supply, you could borrow it for a temporary test unit.


Posted on Nov 05, 2012


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SOURCE: HP Compaq D530 sff Will not power up

I have the same problem but it seems to be related to the NIC. When I start without the ethernet cable plugged in it's fine, plug in the ethernet cable and the machine stops dead. I can't even start the PC with the cable plugged in.

Posted on Mar 05, 2008

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SOURCE: Trying to power up the unit

It sounds like either a bad Hard Drive or your Motherboard is shot. Is there anything showing up on the screen when the computer is trying to boot up?

Posted on Jul 22, 2010

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SOURCE: cannot get power to the tower. power led is

First check to see if you have any capicitors that are defective. (see attached image)mrtekhead.jpg
If you see any that look like this then the motherboard will need to be replaced.
If you do NOT see any, then unplug the power cord from the wall and let sit for 15 minutes to let the unit discharge. Check power outlets or power strips to make sure they have power too. Plug back in and check for power. Hope this helps.

Posted on Mar 06, 2011

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SOURCE: Error on normal boot up,

HI ker7758 ,

You may need to apply "Thermal paste/grease " to the CPU.

You can watch this video tutorial from Youtube:

There are different types of thermal grease. You don't have to buy the expensive ones. The cheapest on the market should be able to do the job.

Posted on Apr 09, 2011

Testimonial: "I found one of the hooks for my heat sink springs had broken off. I re-soldered. Will also take your advice & re-paste."

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New case fan running but still getting error message system fan failed.

Did you try;

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Do this procedure two more times.

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Thanks.Please rate this answer

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When a laptop overheats the CPU will shutdown, this is known as thermal overload. The laptop will not boot up until the CPU has cooled down. If this problem in not fixed then the CPU will eventually fail.
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