No sound due to new power supply,forgot where the connector goes.

Yes you can,

http://www.cputopia.com/hp-480w-hp-pavilion-a815n.html

$19.99USD

Have a nice day

More likely to be power supply problem due to bad caps, you need to open it up and look for caps with bulging top, post back what you see so we can guide you furhter. See example of failed HP monitors and other due to bad caps: http://s807.photobucket.com/home/budm/allalbums

This indicates there is a problem with the Power Supply.
You have a weak voltage power rail.
Components inside the power supply have failed.

Most of the time this due to the power supply, as well as the inside of the computer is dirty.
The rest of the time it is due to a cheap quality power supply from the computer manufacturer.

You can be the best housekeeper in the world, but inevitably dust, dirt, and other material is drawn into your computer.
Your computer uses air to cool the hardware components inside.

Air is drawn in through the front of the Pavilion a730n, and is exhausted out of the back.
(There is one computer case fan in the back, and the Power Supply fan also helps)
This is the computer's Cooling System.

The cooling system for the Power Supply is a fan on the back of the unit, and Heatsinks that are inside.

(A Heatsink is a small plate of metal, with tall fins on it. The Heatsink works as a small radiator. Heat is absorbed up through the fins. Air is drawn through the fins, and heat is pushed away by the air)

When the fan blades, center hub, and surrounding cage become clogged with the above mentioned material, the cooling capacity drops tremendously.
Same thing for the Heatsink fins when they become clogged.

Heat = Wasted Energy
The Power Supply strains to keep up with the power load that is needed, and the additional loss of energy, (Power), that is lost due to heat.

Eventually components inside the Power Supply fail.

Commonly it is the Electrolytic Capacitors that fail first.

Computer manufacturer's commonly use cheap quality Power Supply's. They buy them from a Power Supply manufacturer.
Cheap quality = the computer manufacturer saving money, because the unit's cost them less.

1) Cheap Electrolytic Capacitors
2) Too small of a gauge of wiring is used
3) Cheap quality Rectifier Bridge
4) Cheap MOSFET's
The list goes on.

Solution is to replace the Power Supply.
Power Supply's come in many sizes, and power designations.

The HP Pavilion a730n uses the common size, and shape of Power Supply, used in 90 percent of personal computers. ATX

The power designation is 300 Watt.
Usually it is a Bestec, Delta, or HiPro power supply that is used.
C-H-E-A-P!

Based on personal experience, I would recommend this power supply for a replacement unit,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4675269&CatId=1078

Not an advertisement for said website. You may find a better price by searching.

Know this:
A computer only uses the power it needs, and no more.
Example:
You could install a 1000 Watt power supply in your computer, (Not actually. It will not fit), and if your computer only needs 100 Watts,
it only uses 100 Watts.

(Typically surfing the internet uses 100 Watts. Same as a 100 Watt light bulb)

This is HP Support, Pavilion a730n, and the Manuals page,

http://h10025.www1.hp.com/ewfrf/wc/manualCategory?lc=en&dlc=en&cc=us&product=431078&lang=en&

On this page you can download the Part Replacement Instructions manual.
Has large illustrations, to show how to replace parts inside the Pavilion a730n Desktop PC.

Power Supply replacement is shown.

From me:
If this is your first time in replacing a computer hardware component, this may seem like a daunting task. Once you are finished you'll realize it wasn't all that tough.

Inside your computer you'll see many cables, (Wires)
You'll see cables coming from the Power Supply, that go to the various hardware components inside.
(Motherboard, Harddrive, and CD/DVD drive/s)

Power cables from Power Supply
1) You have a cable with many wires in it. It has a white connector on the end, and is long in shape.
It has 24 socket holes.
It's a 24-pin ATX main power cable.

Connects to the motherboard. To release it from the motherboard, there is a lock tab on the side of the connector. Press the lock tab at the top. This pivots the lock tab, and draws a hooked end, out of the side of the motherboard connector.

Gently wiggle the connector side to side, while depressing the lock tab, ease it up.
(Side to side lengthwise)


2) You have 4-pin Peripheral power cables. (Also referred to as Molex)
White in color, 4 wires. (Red, Yellow, and two Black)

One to each CD/DVD drive you have.

3) You have One SATA power cable. Connects to the SATA Harddrive

4) You have One 4-pin ATX +12 power cable. The connector is square in shape.
Has two Yellow wires, and two Black wires.

This power cable is for power to your Intel Pentium 4 processor, and Must be plugged in.
Plugs into the motherboard.

This link shows the various power cables, and connectors, that I listed above.
(Large photos, and clear information)

http://www.playtool.com/pages/psuconnectors/connectors.html

(Scroll the page down, to view all of the power cable connectors. Click on a photo of a connector, to view more information about it)

Should you need more information, just click on Comment, and type it out. (Believe top right of your page)

Yes it needs a power supply. You can get a cheep one on eaby or get one off of the HP site

Hope this works,

Luke Wilcox

I am working on my neighbor's slimline HP right now. His HP was having the same problem and has an extended warranty thru HP. He sent the computer to them and was told the motherboard is bad and not repairable. They actually told him to go buy a new computer! I told him I would take a look at it for him. I could not verify if it was the on-board video because even though the board has a PCI-E slot only a half size graphics card will fit and I do not have one. I need to verify that it is not the power supply but the problem is the board uses a small form ATX connector so I had to order and adapter for $15 and I am waiting for the part. If the power supply turns out to be then I will probably install a new motherboard. The problem is there is no where to get a new motherboard for this model(was made by Asus for HP). There are only used available one's available with no warranty. When I get the part to test the power supply I will post an update to you.

This is a case where something that is getting switched on during start-up is causing the power supply to fail... probably due to a short. How ever I believe the short is in the power supply

This is an older HP model ( I have a 530N) with teh same problem. I bought a new power supply and installed it.

Take a picture of the inside of your computer and put it up on the website with the wire connectors that need to be connected. The connecting wires should be in four groups. 1. The power supply connectors. These connectors will supply power to to all the power using components not supplied power by the motherboard itself. 2 The connections to the other components in your system like the dvd/cd player and the harddrive and floppy drive.3. The motherboard connections for the case. The power switch connector andreset switchconnector. The power led and theharddrive activity light.The USB connector and the audio connector.The fan connections like the cpu fan and other fan only connectors found on the motherboard.The external fans ( Fans that need to be connected to the power supply).Most of these connections are labeled on the motherboard. The case connectors also should be labeled for the correct connection. The best way to find the answers to this hook-up, may be to call HP pavilion with your computer make and model number,motherboard model number including revisions number. Computer made by big manufacturers tend to have may revisions and the only way to make sure your are getting a correct hook-up to the motherboard is call them for assistance.Especially if the motherboard and case labels are not present or so small that they cannot be read.Hope this helps you with your problem.

It sounds that the Power supply Unit is faulty and needs replacement.The ATX powersupply is easy to replace. you can do it yourself. Just remember how you take it out is how you're gonna install a new one back, remember where the connectors go on the mother board. Remove PC from power mains before you work on the PC. Before you touch the inside of the PC just touch the frame of the PC to ground your self to avoid static. Good luck.

sounds like it is in standby mode..........try pressing and holding the power button until it turns off fully. then remove the power cable to reset the power supply, wait for 5 mins then plug in and try again,

it is also possible that you have a fault , possibly a failed power supply, it might be best to investigate that if the power reset doesn't work

HI Pierre,

I am going to have to go draw something up real quick for you.
In words, The main big connector goes to the only connector on the motherboard that it will fit in.
The smaller connectors rectangular connectors plug into the Hard Drive and another in the CD/DVD drive. Als you may have another connector for a Disc drive.
All the Connectors are specifically shaped not to fit where they do not belong.