Hello,  I have two latitude 3520 with the same problem , No reaction with Button Power (10s, 30s, and 60s) without adaptor, i contact the support They purpose me to put CTRL+ECHAP and connect Ac adaptor, same problem I resolve the problem with :  - disassembly the bottom case - disconnect battery - connect battery - reboot latitude 3520 - message 'dell bios firmware failed the bios was corrupted, restore with backup bios' - system boot ok - i check Dell command update tools (no further update).  Perhaps the dell support retire this corrupted bios on the website.

I had this same problem (frozen BIOS v1.15.0 update) today with an OptiPlex 5000 SFF. It was frozen in this state overnight. I left the power connected, but pulled all the other connections off the back of the machine. In my case this was 1 x Ethernet plus 2 x USBs plus 1 x DisplayPort cable. Then I plugged the single DisplayPort cable back in to see if anything was happening. The BIOS update began to run and eventually finished and booted to the Windows 11 desktop. Then I plugged the 3 remaining unplugged cables back in. It seems to be operating OK with the BIOS v1.15.0 update now thankfully completed. Weird! Neil Howard

Unplug the power and let the battery drain to force shutdown - it takes around 2 hours for a fully charged battery to drop below 50% for it to shut down. Once shut down, plug the power back in and let it charge for about 10-20mins for the battery to reach over 50% then boot the machine back up. It will then initiate the BIOS recovery. If you can't wait for 2 hours, you'll have to unscrew the back plate to disconnect the battery.

I just had this same problem on an XPS laptop.  I didn't have my tools to take off the back, so I connected my phone via USB-C and charged it via the Thundberbolt USB-C port on the laptop.  While it was charging I had the flashlight on, and I also had the brightness set to the highest while watching a 2 hour youtube movie.  The laptop shut down in an hour so I saved myself an hour of waiting.  I also only had to wait 10 minutes on the charger before I was able to get it to boot.  It restarted the update and was able to complete saving the manifest right away.  What a pain.

This shouldn't do anything to the data you have stored. The computer itself might be bricked after this but if the storage device inside the computer is removable, you can always transplant it to another laptop to continue on. Also, try removing whatever is plugged into the USB port. There should never be anything but power plugged in when doing a firmware update.

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In case you're reaching out because of this problem on your laptop, please try performing a Hard Reset: 1. Disconnect any external devices including the AC adapter (and battery if possible) 2. Hold the power button down for 20~30 seconds 3. Bypass any power strips, surge protectors or battery backups 4. Verify the wall outlet is functional 5. Plug only the AC adapter/battery back into the laptop 6. Attempt to power on the system and finish the update. If that does not solved the issue, proceed to the next step. 1. Remove the AC adaptor and wait for the battery to drain completely (it can take minutes or hours depending on the battery level). 2. After the battery drained completely, connect the AC adapter back and press the Power button for 25 to 40 seconds until the battery charging LED blinks twice and then the release power button.  3. Once that is done, check if the update was complete and you have the new BIOS installed.

Unplug all of your USBs if any plugged in. There's a issue with certain usb devices halting bios upgrades.

Hi EricaRW,

My name is Merlina, I am an Independent Advisor and a user like yourself. I'll do my best to help you.

I'm sorry to know that you are experiencing a continuous loop on your PC and can't enter WinRe.

Since when the issue started? Are there any changes made before the issue? How long it is doing the loop? please give it at least an hour. Your PC may be updating.

Other steps you can try:

1. Disconnect any external devices or peripherals (e.g. USB drives, printers, etc.) from your Dell XPS and try booting it up again.
2. If the issue persists, force your Dell XPS to shut down by holding down the power button for at least 10 seconds. Then turn it back on.
3. As soon as you see the Dell logo, press and hold the F8 key repeatedly until you see the Advanced Boot Options menu.
4. Select "Repair Your Computer" using the arrow keys and press Enter.
5. Select your language and keyboard layout preferences, and then enter your login credentials.
6. In the "Choose an option" screen, select "Troubleshoot" and then "Advanced options."
7. From the "Advanced options" screen, try using the "Startup Repair" option to automatically diagnose and repair any issues preventing your Dell XPS from booting properly.
8. If the startup repair option doesn't work, you can also try using the "System Restore" option to restore your Dell XPS to an earlier point in time before the update was installed.

Let me know the result. Thank you!