Error Loading Operating System

I have an LG PC. I have office Professional 2007. The hard drive is seagate 320 Gbytes. It was operating perfectly, until I moved it to another room. I turned it on and the screen said analog power saving mode.
I have changed the battery on the motherboard, double checked all connections, and reboted it and now the screen says Error loading operating system. If I press del it takes me to CMOS utility. But I don't know what to do. Can anyone advise what I should do. Step by step would be great.

Hi megatron, and "Welcome to the Seven Forums." . . .

Now to the problem at hand. First we need to know what operating system you are using. Microsoft Office 2007 is not an operating system. To find out what OS you are using "press and hold the down the Windows Key then push the Pause Key." Doing this will bring up what is known at the "View basic information about your computer."

From that screen you will see the basic information about your operating system and the computer itself. Now type in that information so that we who wish to help can see what operating system, and computer you are using. With this information we can at least start to give you some ideas as to the problem. . .

Go ahead into BIOS setup via Delete key at boot, check that HD is detected and Reset to Optimal Defaults, Save and Exit.

Now what happens?

You'll need the disk provided in Step 6 of Troubleshooting Windows 7 Failure to Start
to boot to run Startup Repair a few times to see what it finds. It should offer to automate System Restore but if not run it manually from the System Recovery Options.

If these first steps fail start at the top of the Troubleshooting steps which include everything possible to start Win7 leading up to if necessary rescuiing your files to run Factory Recovery or get the superior Clean Reinstall - Factory OEM Windows 7

And make sure your hard drive connectors haven`t come loose, you moved the pc, this CAN happen, resulting in what you are seeing.

Lee said:

Hi megatron, and "Welcome to the Seven Forums." . . .

Now to the problem at hand. First we need to know what operating system you are using. Microsoft Office 2007 is not an operating system. To find out what OS you are using "press and hold the down the Windows Key then push the Pause Key." Doing this will bring up what is known at the "View basic information about your computer."

From that screen you will see the basic information about your operating system and the computer itself. Now type in that information so that we who wish to help can see what operating system, and computer you are using. With this information we can at least start to give you some ideas as to the problem. . .

Click to expand...

Hi Lee,
OK, In pressing the windows key then the pause key this Info is on the screen:- MSI Amibios (c) 2005 American Megatrends. Inc.
BIOS date: 08/05/06 Ver : A7255ums V1.0
Intel (R) Core (TM) 2 Duo CPU E4500 @ 2.20GHz, speed : 200x11=2200MHz
Hyper thread disable
DDR2 Speed = 533HMz
Press DEL to run setup (Doesn't Work)
Press F11 for BBS POPUP (Doesn't work)
Initializing USB Controllers ..Done.
2016MB +32MB
Auto-detecting USB Mass Storage Devices..
00USB mass storage devices found and configured.

Then press tab key then pause key this is on the next screen:
Via technologies Inc Via VT8237A SATA RAID CDROM BOOT BIO V1.00
Copyright
Scan Devices, please wait...
No Raid
Ctr10 Chn11 Maser ST3320613AS -SATA mode
Press <TAB> key into User Window! (Doesn't Work)
If you want to install Linux Default partition RAID driver, please do not use CPROM creation operation!
Then it goes to Error Loading operating system

Thanks for your posts and helping me I really appreciate it.
I have checked the hard drive leads they are fine.

If I press TAB at the start up it take me to
VIA Tech. Raid BIOS Utility
Create Array
Delete Array
Select Boot Array
Create/Delete Spare
Expand Span (JBOD) Array
Serial Number View

The Serial Number View is highlighted, If I press F1 it says View Array/Disk Status. It won't allow me to move to the next Item. If I press exit it says do you really want to exit Y/N. If I press Y nothing happens and I have to shut it down.