An update:

Chip replaced with 74HCT04, router working fine.

Thanks, Steve!

Bob Weiss N2IXK


Bob Weiss wrote:
Thanks a bunch Steve!

Although the component designation numbers and layout are somewhat
different, the '123, '125, and '14 all correspond with the circuitry in
my unit, so my burned chip is most likely an 74HCT04. As I suspected, an
el-cheapo logic gate which I should have in stock. Will swap it out and
hope for the best.

Thanks again!

Bob Weiss N2IXK

Steve Sousa wrote:

Hello:

I took a pic of my befsr41, your 81 might be similar.
However when a surge blew my router it was perfectly functioning
except for the wan side, it turned out to be the rtl8019, i replaced
it and has been working since, those small chips were only for the
leds...

Good luck

Steve Sousa