MT300Nv2 (Yellow one) no longer charges phone on USB tether

Technical Support for Routers
1

Hi! Not sure what happened, whether a hardware failure or some configuration needs to reset.

USB Tethering works fine, but the charge circuit no longer charges the phone.

Tried different cables, tried reboot, tried even a second phone. Charge does not occur.

USB connection and tethering works fine, just not the charging circuit.

Any recommendations? Bought the unit about two months ago.

Test performed two ways:

  1. Noticed that the Phone Battery discharged from 100 to 0. This obviously was not normal. Had been working fine for two months, and remaining at 100%.
  2. Using Accubattery. Noticed that when phone was plugged in, the “charge rate” remained negative (that is, continued to discharge). USB data tethering was working fine, but phone continues to discharge.
2

Any recommendations?

The router is currently in wireless repeat mode, and works fine. USB does not charge.