When these laptops are sub-branded, it’s hard to find such files or new ones, even worse to such older model (Yonah).
If the board number matches DA0PL5MB6B0, then…
Bios Packard Bell EasyNote MZ36 PL5 ARGO C2 maybe be a solution, but it may need a cross flash with a programmer.
When some OEMs drop updating their products, some users will try to program bios for the same motherboard from other vendors, this is done with an IC SPI programmer and requires a bit of skill/knowlodge, we are not talking of regular bios flash updates here, if you dont have these skills…just forget it.