Dell Latitude E7440 - No Boot After BIOS Update

After updating the bios from A14 to A28 on my E7440, the laptop will no longer boot and gets stuck at the 'Dell' screen. I've removed the battery, unplugged from power, waited 24 hours, but continues to exhibit this behavior. See attached picture of screen. Is there anything else I can try? Is it dead. Laptop is out-of-warranty.