r/deepin • u/Affectionate_Way8855 • Jun 25 '26
Deepin 25 update bricked my laptop — now won't turn on at all
Hey everyone, need some help. My laptop is a Dell with Intel Core i7 6th Gen and 8GB RAM.
I installed Deepin 25 and it was working fine. Then a 2GB system update came in. After the update I restarted and the laptop was extremely laggy so I shut it down manually.
After that it wouldn't boot properly. On the boot menu I saw a leftover Fedora entry, clicked it by mistake and got "no bootable device found." Then I pressed F2 to enter BIOS setup and after that the laptop stopped turning on completely — power button lights up for a second then dies.
What I've tried: - Force discharge (held power button 60 seconds) - Removed main battery and CMOS battery, waited 5 minutes - Reseated CMOS battery and reconnected main battery - Reseated RAM
Current status:Initially the power LED was coming on for 1 second then shutting off. Now no LED turns on at all — completely dead, no response whatsoever.
Is this a hardware failure or did the BIOS get corrupted? Could the update have caused this? Any help appreciated.
Specs: - Dell latitude - Intel Core i7 6th Gen - 8GB RAM - Deepin OS 25
6
u/enkidelarosa Jun 25 '26
This sounds like a corrupted BIOS/firmware, not just a failed OS boot. The fact that the power LED dies after 1 second means it's failing POST (power-on self-test) at the hardware level.
The Deepin update likely triggered it, but the manual shutdown and BIOS entry attempt are what actually corrupted the firmware. 6th-gen Intel chips can sometimes have compatibility issues with newer Linux kernels, which probably caused the initial lag.
Forced ePSA diagnostic: Remove battery + AC, hold power button for 30 sec to drain residual power, then plug in AC while still holding power until you see a Dell logo or diagnostic screen.