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When i switch my tower on it starts up two beeps screen works for 3seconds then tower shuts down i have replaced the motherboard battery but this didnt fix problem any advice

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  • Packard Bell Master
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The beeps you hear are BIOS Beep Codes.
The computers way of telling you something is wrong, and an area to look into for it.

It sounds as though your Packard Bell has an AMI BIOS.
[American Megatrends Inc.

BIOS stands for Basic Input/Output System]

2 Beeps then a pause, then it repeats usually means a problem with the Ram Memory.

I would suggest you remove the Ram Memory modules, ('Sticks'), and clean the gold plated contact pins on the bottom.

This is an example of a DDR Sdram ram memory module,

http://en.wikipedia.org/wiki/File:Generic_DDR_Memory_%28Xytram%29.jpg

(You can left-click on the photo to enlarge. You can enlarge twice)

Use a pencil eraser to clean the gold plated contact pins on the bottom, of the ram memory module.
Both sides.

If you are not using a solid eraser, and using one on the end of a pencil, refrain from letting the metal band contact the pins.
Rub the eraser up, and down each contact pin.
You may not see anything happening for your work, but I assure you that you are cleaning the contact pin.
Doesn't take much pressure with the eraser.

{The gold plated contact pins develop corrosion on the surface. Doesn't take much corrosion to make a bad contact ]

Use air to remove the eraser dust.
You can use a can of compressed air for computers, or air pressure from your mouth will be sufficient.

If you have a can of compressed air for computers available, also use air to clean out the ram memory slot/s.

Reinstall the ram memory. Close the computer case. Plug the computer into power, WAIT 1 minute, turn the computer on.

Basic guide in a video of how to remove, and replace Ram Memory,

http://www.youtube.com/watch?v=r2EC4BxtBSY&feature=related

NOTE*
When I stated basic guide, I meant Basic.

Since you have already replaced your CMOS battery, you are probably aware of the following.
If so, please disregard.

Always work on a table. If your table is directly on a carpet floor, do not swing your legs.
Observe Anti-Static Precautions when working on a computer.

Your body carries Static electricity.
Static will fry out (Short circuit) the hardware components inside a computer.
You may not even see it, or feel it.

Computer on a table, computer unplugged from power, computer case open.
TOUCH the metal frame of the open computer case to relieve your body of Static.
Should you leave your computer in the middle of working on it, be SURE to Touch the metal frame again upon your return.

The Locks, or 'Ears' as I like to call them, on the outside of the Ram Memory slots, swing to the outside.
The top of the Lock moves to the outside of the ram memory slot.
The lock pivots much like the action of a see-saw on a playground.

There is a Lock on each end of the Ram Memory slot.
Down in the bottom of the Lock is a small slot.
This is where the bottom outside corner of the ram memory module sits in.

There is a Locating Notch in the bottom of the Ram Memory module. It may look to be centered upon a casual observation. It is NOT.

There is a Locating Lug in the bottom of the ram memory slot. The Locating Notch must line up with the Locating Lug.

There is a Notch on each end of the ram memory module.
There is a protrusion, or "Bump', on the Lock that matches the Notch.
When the ram memory module is inserted correctly, there are usually two satisfying clicks, as each "bump' clicks into the Notch.

Have any further questions please state in a Comment.

[The tower shutting completely off does concern me. Clean the ram memory module contact pins. Clean inside of the computer with a can of air. Try to start the computer again.

You may have a failing Power Supply ]

Posted on Nov 10, 2010

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