ppoe falling out not registering

We have abig problem with ppoe disconnecting and then customer loosing connection

We have replaced the following:

  1. Moved the site to new location
  2. lmr400
  3. pigtail
  4. radio
  5. cpu
  6. mb
  7. ram
  8. power supply
  9. cabinet
  10. frequency

The frequency they are working on is 24xx - 25xx

The problem we have is the clients register and then the ppoe stop working. We don’t know what more to do.

Other channels are working fine but they don’t have ppoe’s We have some 80 hi sites and the ppoe / radius manager work fine on the other

If you need more info log in I can arrange but this one got us
Any ideas