I'm getting a screen that says "self test G" in a

I assume you are doing a System Restore/Recovery? Have you removed the HDD and tested it? Perhaps the Recovery files are corrupt/missing? A bit more info needed.

The monitor might be faulty ....do a monitor self test ...disconnect the datat cable from the monitor and turn it on ....there would be a color code , if the color code is ...
RED....GREEN....BLUE which might appear as RGB or the colors itself......then the monitor is ...if the color code is different then the monitor has to be replaced

this is not a pc problem... this is because the connection loss between pc and monitor... not all pc's have sleep mode in externa vga connection.... it just cuts power off... u can configure monitor of possible to do that..

Have the hard drive tested for issues, from your description it is the harware that is causing the problems.

You can try to do the monitor self test.
Monitor Self Test:
1. Physically test the monitor autonomously from the computer.2. Switch both the monitor and the computer off, and then disconnect the VGA cable le from the computer.3. Turn the monitor on, pressing the power button for about three seconds. The self-test screen will come up .4. If the image is clear, bright, and shows red, green, and blue, the monitor is working properly. Video issues may be due to the video resolution in the computer, and not the monitor.5. If the image is not apparent and intense or the colors are not accurate, then the trouble is with the monitor or some of the (OSD) settings. In this case, test your particular monitor's information for OSD.
It is always important to check the color of your power light for so you can distinguish if the monitor is defective. Getting red lights on the the power panel states that the power section of the monitor is faulty.

To start the systemrecovery:

1. Restart the computer.
2. When the Computer logo appears on the screen, press the Alt and F10 keys repeatedly.
3. If you are prompted with a Microsoft Windows boot screen, press the Enter key.
4. After the system recovery application has loaded, follow the prompts to reinstall the Operating System.

If the ability to reinstall from the previous method is not available orfails, recovery of the Operating System will need to be from Recovery Media. Ifyou do not have a set of Recovery Media, you may purchase the set onlinefrom the manufacturer. Note: If your computer does not havean internal optical disc drive, an external optical disc drive will be requiredin order to recover the Operating System using Recovery Media.

1. Restart the computer.
2. When the computer logo appears on the screen, press the F12 key repeatedly to enter the computer's Boot Menu.
3. Press the CD-ROM drive eject button and insert the disc labeled System CD.
4. Close the CD-ROM tray.
5. Refer to on screen instructions to select either CDROM or USB CDROM.
6. The computer will boot from the Recovery Media
7. When prompted for the Recovery CD, remove the System CD and insert the Recovery CD.

Note: Ifthere are multiple Recovery CDs, please insert the first of the Recovery CDs.

1. After the system recovery application has loaded, follow the prompts to reinstall the Operating System.

@rkbrown1_rb

If your Dell diagnostics shows no fault on the hardware (hdd, memory, chipset, videocard, etc.) but still same issue occurs, I recommend doing another test using a different utility. Try using Hiren's Boot CD that can be found here and try running the S&M Stress Test 1.9.1 and Video Memory Stress Test 1.7.116. If your computer hangs while doing the stress tests, the video card or CPU might be failing already.

Good Luck.

Hello
This is a hard drive failure.Try holding down the f8 key while booting up and choose command promt.
Once there use Chkdsk .

Here is a link that explains how.This will check the drive and possibly repair it.If not you will need a new hard drive

http://support.microsoft.com/kb/315265

The issue is that the monitor in not getting the signal. This tells me that the video adapter ( or on board video) has went bad. Try another video card if all your doing is social media and surfing you can pick one up for around 20.00

its showing u monitor self test feature screen issue either with the monitor cable or monitor or the graphic card