Asus RT-AC5300 Problems

Hi,

I have this router for 3y and 2m.
Have had problems since the beginning, but nothing I couldn't overcome.
Unfortunately he doesn't do it anymore..

When I turn it on,
the power led goes on, half power (stays on)
the WPS les flashes 1s, half power (goes out before the WAN led)
the LAN led blinks 0.5s, half power,
when it's out the WAN led flashes once, full power.

That's all

Tried reset
Turn off, pusch reset, turn on, wait for power led start blinking
Turn off, pusch WPS, turn on, wait...

Asus RT-AC5300 Problems