Gigabyte GA-7DX+ won't power up. Checked momentary swith ok, shorted MB connector green lead to gnd, powers up as long as short remain. Doesn't latch. Also apparently no video, not POST beep. Tried various combinations removing memory, cd drive, floppy drive - no change. Assistance would be appreciated.

Oh? Did this just happen?

Or are you installing this motherboard for the first time?

Will help to know, because you may not have the necessary needed, power cables plugged in,
OR;
One or more of them may be loose.

I also see that English is not your native language. I apologize that English is all I know, in advance. If you see something printed here you do not fully understand, post back in a Comment.
We will work it out.

Gigabyte GA-8I945GZME-RH,
(GA-8, capital I, 945GZME-RH, not GA-81945GZME-RH ),

http://www.geeks.com/details.asp?InvtId=GA-8I945GZME-RH-BO

Gigabyte Support > GA-8I945GVME-RH motherboard > Main Support page,

http://ee.gigabyte.com/products/page/mb/ga-8i945gzme-rh/download/

See where it states -
Advantages/ Overview/ Specification/ Downloads/ News/ Awards?
Look at the black bold subheading under it - Download type: and under it - Drivers - in the box.

Click on the blue arrow to the right of the box.
In the drop down list click on - Manual

In the list go to the second file down.
English - 1003 - 5.4Mb - 10/07/2006
Left-click on the blue -> FTP

This is a PDF file. After you click on FTP, it may take up to 30 seconds before the first page comes up.

Power cables to motherboard;
1) 24-pin ATX main power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

2) 4-pin ATX +12 Volt power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4

Notice how both power cable connectors have a LOCK on the side?
Look at the photo in the middle for both power cable links, above.

The connector on the motherboard has a TAB, that the Lock goes over.
Hooked end of Lock, goes over Tab on female motherboard connector.

When the hooked end of the Lock is over the Tab, on the motherboard connector, you KNOW the power cable is plugged in tightly.

If not, there is your problem.

Do you have the SATA power cable plugged into the Harddrive, tightly?

SATA power cable,

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

Do you have the SATA data cable plugged in tightly to the motherboard, AND to the Harddrive?

http://en.wikipedia.org/wiki/File:SATA_ports.jpg

CPU = Central Processing Unit. Another term used is Microprocessor, or simply Processor for short.

Does NOT mean personal computer.

CPU is on? You mean the Power Supply's fan is running, and computer case fans, and Processor fan.
Does not mean the Processor is on.

Why?

Primer:
You press the Power On button. This plastic assembly pushes against a Power On switch,

http://www.axiontech.com/prdt.php?item=78201

The Power On switch is a Momentary Contact Switch.
It closes very briefly, which in turn briefly completes a circuit.
The Soft Power On circuit.

The Power Supply always has a constant 5 Volts present, when it is plugged into power. A 5 Volt reserve power, called the 5 Volt Standby power.

Closing the Power On switch briefly provides a Ground, and completes the Soft Power On circuit.
The Soft Power On circuit excites the Power Supply, and turns it on.

The first chipset to receive power is the BIOS chipset.
The Basic Input/Output System program, on the BIOS chipset, is initialized. (BIOS program)

BIOS looks to see what devices are connected, does a Ram Memory count, TURNS the Processor on, and hands the computer over to the Operating System.
(Windows XP, and Windows 7, are two examples of an O/S)

You are getting a 'Cable not connected' error message, which means BIOS hasn't turned the Processor on.

Is the 4-pin ATX +12 Volt power cable plugged in, and tightly? It's power for the Processor.

Post back in a Comment.
Regards,
joecoolvette

Motherboard schematic are not available due to trade secret from the manufacture.. Motherboard are not made to be repaired because they are printed circuit in different layers.

the speakers plug/outlet is usually at the back of the computer you will have to open up the computer to check the lead attached to the rear of the input plug make sure the connection is good
try cleaning your computer of dust using a fine air blower from a compressor making VERY sure that there is no MOISTURE in the air line specifically around the sound card and the CPU central processing unit dust causes static to build up in a computer
hope this helps

Your mainboard may be one of the mainboards on the P67 Chipset in that the SATA Controller dies.

These mainboards have been recalled by Intel, you should contact the place of purchase for warranty support.
Try to turn on the PC with no SATA devices connected.

Claim warranty support ASAP!

Be sure to rate this solution, thumbs up!

Thanking you
damnor01

that model does not come up on the eb page for gigabyte so need to know the socket type to get the informaion you need psot it here and I will try getting it again

Using the manual for the Gigabyte GA-945P-S3 MB. Go to page 71 & you'll see bios beep codes for your board: AWARD BIOS Beep Codes 1 short: System boots successfully 2 short: CMOS setting error 1 long 1 short: DRAM or M/B error 1 long 2 short: Monitor or display card error 1 long 3 short: Keyboard error 1 long 9 short: BIOS ROM error Continuous long beeps: DRAM error Continuous short beeps: Power error As you can see there isn't a code for three short beeps. When you boot your system try to pause your boot up screen. See if the bios is reporting the correct total of memory in your system. Bios codes from the link below. http://www.computerhope.com/beep.htm#05 3 beeps for the AMI bios code reports Base 64K RAM failure. You can test your memory. Go to memtest.org Scroll down the site to just under the three screen shots. Download Memtest86+ V2.11 You have a choice in making a bootable floppy disk or a bootable CD-ROM disk. Once completed you boot your system to the testing program. Memtest will check your system memory. This should help. Thanks for using FixYa! Mike

I went to dogpile.com typed in "gigabyte ga-7dx" for the search, looked for the gigayte web site, clicked on the link and the page popped up. I selected to download the manual and can now read it. Just follow these steps and i'm sure you will have the manual too. It is all there. Best of luck.

You should be able to find all your answers here.
http://www.gigabyte.com.tw/Products/Motherboard/Products_Spec.aspx?ClassValue=Motherboard&ProductID=1361&ProductName=GA-7DX

If the wires from the reset switch is white/blue the blue wire is positive, Hdd red/white red is positive power Green/white Green is positive etc. The wires on the speaker connector will be red/black/black/white - red is positive. The colored wire is always positive. On all GA mb's the positive connection is always towards the back of the MB and are marked with a + on the base of the pin as you can see on the photo. Hope this help.

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