We won't see your images until the moderators approve them, even though you can see them now..

2000-0723 = Hard Drive – Drive error detected.

• Turn off your computer and make sure the hard drive connection is good (see your service manual for instructions).
• Repeat the PSA diagnostics.
• When the diagnostics still results in an error code, visit our ePSA online tool. You can get more information on possible resolutions to your issue and even get a part dispatched if needed.

If none of the above helps, try clearing BIOS:

1. Power off, unplug
2. Press/hold power button for ~15 sec
3. Open case and remove motherboard battery (check Service Manual for details)
4. Press/hold power button for ~30 sec
5. Reinstall the battery (Time for a fresh CR2032 3-volt coin cell battery?)
6. Close up and connect only mouse, monitor and keyboard
7. Reboot

And if that doesn't help, disconnect the boot drive (HDD or SSD?) and reboot and see if you get as far as a new error, eg "no boot device found", or simiilar

I won't try updating BIOS when the PC won't boot. That could be a shortcut to turning it into a useless brick.

hard drive error?  does your Dell logo come on screen and disappear normally during POST?  if yes it is your OS boot that is stalling, correct?  I do not trust Dell SupportAssist, but if OS loading is an issue, I would just do a clean install of Windows 10 OS on the hdd to start with a clean slate, unless you have important files on HDD that you need to back up first.

I have the same problem with the AMI Bios Guard error. I have tried the USB boot. I have run diagnostics with no issue found. I have unplugged the computer and removed the motherboard battery and replaced it. Same error immediately each time.  

Any ultimate luck with figuring this out?

XPS8930 i9 win10

@badger55  What PC model?

Have you tried doing a BIOS Recovery, type 3? You need a USB stick with the .rcv file (not the .exe file) for this PC's BIOS on it

Thanks so  much for the detailed background.  As soon as I select the file and start the flash bios I immediately receive a message:  "AMI BIOS Guard Feature disabled".. That is all and not explanation of an actual error.

I tried using the .rcv on the USB stick. Did not show up when I tried the flash bios option.  I looked in all three options of FS0, FS1 and FS2.

@badger55  Let's back up... Do you get an actual AMI BIOS Guard error message like any of the ones listed here? I have vague recollection that another user with an AMI BIOS Guard error found it was a RAM problem. So try reseating each RAM module in its slot, or maybe try them one at a time in 2nd slot from CPU to see if you can stop that error message.

The .exe file on the USB stick is used to upgrade (or downgrade) a working BIOS. The .rcv file is only used to recover BIOS when the installed version isn't working.  Do you know what version of BIOS is installed? No guarantees a BIOS Recovery will run while there's an AMI BIOS Guard error, or if it will be successful.

The latest XPS 8930 BIOS is v1.1.29 and there's a link to download the BIOS Recovery Image File on that page.  (Note: when you read the BIOS Recovery page I linked above, you'll see the .rcv file is identical to the .exe file, but just with a different file name. So you could rename the .exe file, but you have to rename it exactly as indicated on the BIOS Recovery instructions page or it won't work.)

Did you reseat the RAM?

The .rcv file is ignored when you use the F12 flash update option.

Read the instructions at the link I posted to run a BIOS Recovery. Plug a USB with only the .rcv file on it into PC with power fully off. Then power on and immediately press/hold both Ctrl and Esc keys at same time until keyboard backlight comes on up (eg, Num lock key and/or Cap lock LED blink). Then release both keys and wait for the Recovery screen to open.

If the Recovery doesn't launch, power off, unplug power cable from rear of PC. Press/hold power button for ~30 sec. Reconnect power cord to rear of PC and try to launch the Recovery again.

Thanks again.  I have tried following the instructions explicitly. However, each time the keyboard lights up and that is that - no blinking.  The system just rolls right past the Dell screen to the Windows login. I did unplug and hold power button prior.  I am using the front usb ports. Does that matter?