U16 on PCB of Noyafa NF-8209S cable tester emitter

[stryker]

Hi everyone

I have a Noyafa NF-8209S network cable tester that's dead. It's the smaller of the two units, the emitter. On disassembly there's a SOT23-5 component at the battery connection end of the PCB marked U16 that's now just a scorched remnant.

If by any chance you've got one of these I'd love to know what the markings are on that? I've not been able to locate any images.

Thanks in advance,
Geoff