Dell Inspiron won't boot after failed bios flash, please help

Inspiron 7547, on Dell's site I saw there was a new bios A08, I had A05. Made the bootable dos usb and started the bios update, it wrote a bunch of stuff ok but then had an error msg 'P/W: Not enough memory'. Nothing changed after ~1hr so I had to power off.

Now it won't boot. The power LED comes on, I hear the fan, but screen is blank, no Dell logo. I have tried taking out battery, pressing power button for 1min, didn't help. I also tried the method here -...

Dell Inspiron won't boot after failed bios flash, please help

Dell Inspiron won't boot after failed bios flash, please help