Dell Inspiron 5520 BIOS recovery help needed
Hi!
So the story is. The laptop's battery is dead, so I have tried to update BIOS from recovery mode. Extracted the .fd file from official BIOS updater with WinRaR, placed it on a FAT32 pendrive, and started the laptop with END key + plugging in power adapter to get in recovery mode. When the beeps finished, I have tried to turn it off with pressing power button, but it won't react. So waited for about 15 minutes, still nothing, pulled out power cable. After that, the laptop didn't do anything, can't turn it on, can't enter recovery, it's fully dead, just there is power on USB ports. I have disassembled it, flashed downloaded dumps (attached them) to the SPI chips, and tried to turn it on. Still nothing.
What I have missed, why it's not working? Any help is really appreciated.
So the story is. The laptop's battery is dead, so I have tried to update BIOS from recovery mode. Extracted the .fd file from official BIOS updater with WinRaR, placed it on a FAT32 pendrive, and started the laptop with END key + plugging in power adapter to get in recovery mode. When the beeps finished, I have tried to turn it off with pressing power button, but it won't react. So waited for about 15 minutes, still nothing, pulled out power cable. After that, the laptop didn't do anything, can't turn it on, can't enter recovery, it's fully dead, just there is power on USB ports. I have disassembled it, flashed downloaded dumps (attached them) to the SPI chips, and tried to turn it on. Still nothing.
What I have missed, why it's not working? Any help is really appreciated.