Debug LED code AA - computer errors and tries to restore every boot and never completes and shutsdoiwn

Restart your computer repeatedly tapping the f8 key to enter safe mode while the screen is black once in safe mode where the only things working will be your keyboard and mouse allowing you to attempt to repair your computer
If done properly the user should get to a screen similar to the below screen. Select the option for Safe mode command prompt only Windows Advanced Options Menu
Please select an option: Safe Mode
Safe Mode with Networking
Safe Mode with Command Prompt Enable Boot Logging
Enable VGA mode
Last Known Good Configuration (your most recent settings that worked)
Directory Services Restore Mode (Windows domain controllers only)
Debugging Mode Start Windows Normally
Reboot
Return to OS Choices Menu Use the up and down arrow keys to move the highlight to your choice. To perform a system restore, follow these steps: 1.Click Start, click Run, type msconfig, and then click OK. 2.On the General tab, click Launch System Restore. 3.Select Restore my computer to an earlier time, and then click Next. 4.Calendar dates in bold are possible restore points. Click the most recent one to view system restore information. 5.Select a system checkpoint or an installation restore point, and then click Next. 6.Close all other programs. 7.To start the system restore, click Next. 8.Your computer restarts. Repeat steps 1 through 8 until you fix your configuration issue.
or

It is possible for the Windows operating system on your eMachines computer to have a critical failure. If the operating system on your eMachines computer is failing, you can use your recovery discs to restore your computer. Recovery discs come with your purchase of an eMachine, and contain your operating system and all your basic drivers. You can recover your eMachines W series in about an hour.

Turn off your computer and press "F8" to enter the BIOS menu. Tab over to the "Boot Sequence" or "Boot Order" menu. Move your optical drive to the top of the list. Press "F11" to exit and save changes. Insert your recovery disc into your optical drive, then restart your computer. Press any key to boot from disc. Select the "Full Recovery" option from your recovery disc menu. Allow the recovery procedure to complete. Hope this helps.

Try doing a System Restore and choose to restore the system to a date when in was working successfully last, or maybe just before then:
Boot into Safe Mode, then go Start, All Programs, Accessories, System Tools, and then choose System Restore. Once the System Restore is complete, let the system boot normally and see what happens.

take note of what the blue screen text says, if you can get it to stop in blue screen, write down what the screen says and go to another computer and type those items into a google search, that will lead you to the error code page of microsoft and perhaps a better idea on what is going on with your pc

A beeb normally means defective (hardware failure) DOA. Go back to your store for a warranty replacement.

Does it start without the scanner?
http://tinyurl.com/69hd8kf

Does computer beep when you turn it on? Information on beep codes bleeps on booting, boot codes led flashing flashes 1 2 3 4 5 once twice three times on and off times on boot. power on self test fail, boot failure.

Quick help guides and LED flashing errors codes search for error codes using your Service manual.

Maybe more info here
http://www.goodson.com.au/service/FrmService.htm

Led 2 flashing indicates the the computer is undergoing POST (testing components). If it flashing then something is wrong, usually the computer beeps a cumber of times which translates to a code eg ram error.

When led 2 is stable, the computer completed POST and is booting up through bios and then the OS.

Led 1 on which means the computer is receiving power.

See Manual: http://global.aopen.com/userdownload_List.aspx?RecNo=10062&Model=1258

Did you try to "Restore this computer to another point in time"? Then you press F8, and choose "System Restore" then another screen asks if you want to go to safe desktop, or do a system restore, when you select system restore,another window, a bit like a calendar, and you choose a date prior to when you had problems?
Otherwise, please try this... when dell screen comes up on keyboard hit CTRL+ F11 twice only then you will see Dell pc restore by Symantec.Hit on restore and hit on i agree and select the option Restore the pc to dell factory settings and then it will restore the pc.
Otherwise you will have to obtain a Windows Vista install DVD, boot on this and repair/reinstall from That.. anyway try whats proposed and get back to me..

DST (Drive Self Test) failed. this simply means that the drive is no longer stable. If you are unable to boot to windows or safe mode and this is the error you get you might need to do a low level format if you still want to use it or do a debug script then repartition and re-format the drive.

The Low-level partition - will reinitialize your drive to the factory settings.

Debug Script - removes DOS and non-DOS partitions on the hard drive. It also allows you to convert a drive from an incompatible partition structure to one that will work with FDISK.EXE such as, converting Linux partitions to MS-DOS partitions.

For you to use the Low-level format and to completely wipe out HDD data. Use the format software from http://www.killdisk.com, download the CD ISO image , burn to CD, ad boot from CD , the rest can be found in the menu.

In using the debug script use this :
Insert the boot diskette that contains the Debug command into the respective drive.
Restart the computer.
A black screen with Microsoft Windows® 95 Startup Menu will appear. Press the <5> key on the keyboard followed by the <Enter> key. The boot process will conclude with an A:\> prompt, followed by a blinking underline (cursor).
From the A:\> prompt, type the following commands and press the <Enter> key after each command:
NOTICE: Performing the following will remove all data from your hard disk drive.

NOTE: Type the bolded text only (the debug prompt is a dash). You will receive an error if you type anything other than the bold text. The non-bolded text represents the system response that will appear after typing each command and press the <Enter> key.

debug
-F 200 L1000 0
-A CS:100
xxxx:0100 MOV AX,301
xxxx:0103 MOV BX,200
xxxx:0106 MOV CX,1
xxxx:0109 MOV DX,80

NOTE: Type 80 for the Main hard drive - HD 0, or type 81 for the Second hard drive - HD 1.

xxxx:010C INT 13
xxxx:010E INT 20
xxxx:0110 (Leave this line blank and press the <Enter> key)
-G

The message, Program terminated normally, appears. Turn off the computer by pressing the power button.
On the next startup the hard drive must be partitioned and formatted.

Hope this helps to save your drive.

Replace X-tal (Viper) on SSB (item 1H00, order code: 2422 543 01397).

REMARKS:
- Error 5: Viper does not boot.
- Only a "reboot" is visible in the Debug menu.
- Error will appear after heating up of the xtal.
HISTORY:
23-03-'06: Chassis added. Text updated.