Ethernet switch teardown

Here is tear-down of old Zyxel  ES-108 10/100Mbit/s Ethernet switch. I had one on my network for many years, but one day it stopped worked and started making whining noise.

Look inside.

Closer look to details.

Main Ethernet switch chip is ADM6999 from ADMtek (now part of Infineon). In addition to it line transformers and power supply, not much more.

The problem seems to the power supply on board putting out wrong voltage to electronics: Varying from around 3.7V to 4V when it should be 3.3V. Chip heats up and nothing works. Maybe not worth to try to fix… get a new faster.

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