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October 24th, 2025 17:20
Dell dvt unit update
Hello ,
I am young student who bought a dell inspiron 14 plus 7420 ,i noticed after i bought it that i was in possession of a DVT unit (dev test unit ),which has the version 0.3.0 of bios ,which caused me some charging issues only a year after buying it and i cant install some other driver update not even bios one , i wanted to know if its okey to hard flash the bios with an external flashdisk with an image of a newer supposedly supported bios version like the 1.6.0 without facing major issue
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ejn63
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29.6K Posts
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October 26th, 2025 11:02
The only sure solution is a replacement system board.
You can also have a shop reflash the firmware with the production version, but there are no guarantees that it will work with a pre-production mainboard, so you could wind up paying over $100 just to find out you need a board anyway.
ejn63
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October 24th, 2025 17:50
You would be better off returning the system to your seller for a refund. That BIOS is likely from a beta tester or developer -- there's no guarantee the hardware in the system is the same as the production models.
Calypso0000
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October 26th, 2025 05:29
@ejn63 unfortunately i cant return the pc because i bought it a year ago and it was running just fine until now ,i didnt knew then that this laptop is a test unit .and it production date was not far from the official product's one 15 days at most , am looking to test with another charger if this will fix the problem i hope . The product do have a service tag that is not recognized by the dell website ,i was hoping maybe a dell dev can give me an answer ,but no way to directly contact them without the service tag ,plus the supportassist app do recommand me to update the bios to the newest update ,but the update fails when i try to execute it .
(edited)
Calypso0000
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October 26th, 2025 14:38
@ejn63 thanks you for your answer sir 🙏
(edited)