If you need a .bin file for a hardware programmer (like the CH341A), you can extract it from the official Dell installer:
Official BIOS files are usually provided in .exe format, which can be used to update a working system or be extracted for manual flashing. Download n5010 DUMP BIOS BIN FILE BIN
If the laptop is dead, you must disassemble it, locate the 8-pin BIOS chip (often near the Super I/O or ICH), and use a USB BIOS Programmer to write the .bin file directly to the chip. If you need a