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October 4th, 2024 01:29
Inspiron 5490 AIO Desktop BIOS Update Loop Error
Our Dell Inspiron 5490 Desktop is stuck in a BIOS update loop. I've tried holding and spamming F12, F2, Ctrl/Del, Ctrl/Alt/Del, holding power button, and numerous other button combinations. I even just disassembled the back to get to the motherboard to take out the battery. I have a bootable USB to manually update the BIOS but since I can't get into boot mode or any other mode it's useless. I'm running out of ideas. Here are the alerts I get. "BIOS corruption has been detected and auto recovery is triggered" it then goes to a screen saying it's updating the firmware. When it gets to 100% I get another alert saying "BIOS update blocked due to unsupported downgrade" This loop started when the computer accidentally got unplugged during an update. Any ideas or suggestions?
bradthetechnut
7 Technologist
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9.1K Posts
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October 4th, 2024 03:02
Did you replace the size 2032 battery with a new one? Bad batteries affect BIOS and therefore affect PC operation.
Might need to do a BIOS reset.
Dell BIOS Recovery
redxps630
9 Legend
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14.6K Posts
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October 4th, 2024 16:34
Inspiron 5490 spec has Intel 10th gen cpu and is quite recent so I doubt battery has run low already
trouble is bios setting is disable downgrade. since OP can not get in BIOS to change that to enable, it is in a catch 22
BIOS options
redxps630
9 Legend
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14.6K Posts
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October 4th, 2024 16:35
OP try to uninstall hdd (thus remove BIOS recovery file on hdd) and plug in USB that had latest BIOS recovery file and see if AIO can auto recover BIOS from USB which is not a downgrade from current bios version
RoHe
10 Elder
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45.2K Posts
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October 4th, 2024 19:20
BIOS Recovery - Follow instructions for using an empty USB stick (not >8 GB, and formatted FAT32).
The BIOS Recovery Image File (BIOS_IMG.rcv) v1.22.0 you need...
bradthetechnut
7 Technologist
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9.1K Posts
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October 4th, 2024 21:19
@redxps630
The 5490 AIO was released in Nov. 2019, hence asking if the battery was replaced. It can also be tested.