I have , Gigabyte 848 G motherboard> the problem is that CPU not booting even when trying booting it using direct junction the 2 power legs on the board . it boot when connect power up leg of the board's main power supply with any of its ground legs , but in this case, some motherboard' components drooped

http://www.gigabyte.com/products/product-page.aspx?pid=3789#ov

"GIGABYTE DualBIOS is a patented technology that automatically recovers BIOS data when the main BIOS has crashed or failed.

-> Featuring 2 physical BIOS ROMs integrated onboard, <-

GIGABYTE DualBIOS allows quick and seamless recovery from BIOS damage or failure due to viruses or improper BIOS updating. In addition, GIGABYTE DualBIOS now supports 3TB+ (terabyte) hard drive booting without the need for partitioning, and enables more data storage on a single hard drive."

Downloads > Download type: Manual > English 3001 pdf 30.46MB

(S-l-o-w download. Took over 2 MINUTES, and usual time is around 10 seconds )

[Scroll mouse cursor to the Bottom/Middle. The ghosted out navigation guide will appear. Click on the Adobe PDF icon all the way to the right. When your mouse cursor is on it, - Show Adobe Reader toolbar - briefly comes up.

AS SOON AS you press the Power On button, start tapping on the DELete key. Tap in 2 second intervals. If you hear beeps while tapping ignore them.
They are Stuck Key Error Code beeps.

Page 66 - BIOS Update Utilities

Supposedly with having two BIOS chipsets. Main and Backup; the backup BIOS chipset is supposed to take over, with the next boot; in the event something happens to the Main BIOS chipset. (Program)

Regards,
joecoolvette

I love using Gigabyte boards in my own Home Theater PCs, so I run across this problem sometimes when I'm setting them up for the first time with a USB keyboard. Pretty sure the problem you're having is the same--the BIOS isn't set to 'recognize' USB keyboards by default, so try the following:

• Turn it off, and connect an older PS/2 style connecting KB to it;
• Turn it back on, enter the BIOS, and find the settings page with 'USB Keyboard' in it;
• Change that setting to BIOS rather than SYSTEM, so next time you boot, it will 'see' your USB KB. Plug in your USB KB before rebooting, then save the settings and reboot the PC again.
• You can leave the old PS/2 KB plugged in to make sure you can change things, but try your USB keyboard out as well. You should be able to control BIOS settings upon reboot.

Hopefully this was all you needed. If it persists, be aware that some Gigabyte mobos have had BIOS issues galore (eBay is full of Gigabyte BIOS chips).

Check your CPU make sure its placed correctly and that you don't have too much contact grease,you only need a very small amount.
If that's not the problem try re-seating your ram and video card.
Other then that look at the power supply could be under powered!
hope this has helped

you need to do many task for this simple prob:-)

>> take out the RAM and switch on the system even thought if you don't get beep then
>>>> take out the Bios battery and switch on , if here also you don't get
>>>> check the SMPS
>>>check the processor with some other board where your processor support
>>>> check your m/board with some other processor which your board support

Enter you're bios and disable ACPI. Wait until you have at least SP2 installed before enabling ACPI. While in the bios open, Hardware Monitor & MISC Setup. Watch the CPU temp. See page 53 in you're manual.
You're system shutting down may be caused by the CPU over heating. This is a safety feature for all MBs. Suggest that you remove the CPU heat-sink assembly from the CPU. Check the thermal past / tap. If it is dried or cracked replace. Remove the old using house hold alcohol on a clean rag. (Not dripping wet). At this point there is no need to remove the CPU. Clean the CPU's fan and blow out any dust build-up within the assembly. The heat build up will cause you're system from booting untill the CPU cools. This is why it seems to take awhile for you're system to boot.
Link to Gigabyte GA-7VKML manual; http://europe.giga-byte.com/FileList/Manual/motherboard_manual_7vkml_e.pdf

Gigabytes main site for GA-74KML;
http://www.gigabyte.com.tw/Support/Motherboard/Manual_Model.aspx?ProductID=1306

Cheers'
Mike

Do the fans still start spinning ? And did you do a CMOS clear ?
You should also try booting it without a graphics card and/or any other audio/network card, etc, so you only have the CPU and motherboard (and also try it with 1 RAM bank and without). When it beeps, it's probably alright (implicating other failing hardware).

When you hear no beeps at all (but the fans spin), it's pretty likely that the board is gone. You might want to doublecheck the powersupply and CPU nevertheless.

i think the cpu may have a problem with the board or the memeory. either its bad, damaged or incompartible with your system. try out another cpu

some hard ware problem i think..try to replace RAM ...

Fiend your solution direct from Gigabyte. Here is your solution.....



http://www.gigabyte.com/motherboard/prob676ijt65/solution
884

Hi Jay,
Is you're memory installed in the two yellow slots?
Try using only 1 DIMM in DDRII_1 slot.
Page 17 in you're manual. When using only one PCI-E graphics cards you do not need to plug in extra power to the board, as shown on page 19. (Only need this additional 4-pin Molex when running two PCI-E cards).
Check internal connector is plugged in item,
1 ATX_12V_2X (Pg. 23 in you're manual).
(System will not boot without this).
Also item, 2 main power 24-pin Molex cable is securely connected. Chassis Intrusion Header (By default is opened/no jumper). I don't like the CPU getting hot. It shouldn't. Do you have a spare heat sink & fan for you're CPU? Are you 100% the cooling system is running correctly?
Lastly, here is Gigabyte's Qualified Vendors List (QVL), for you're board. Corsair 2GB is not listed.
http://www.gigabyte.com.tw/FileList/MemorySupport/motherboard_memory_ga-ma790fx-dq6.pdf

Luck!
Mike