I just bought a router and the power adapter (12v 2a) is broken. I have a 12v 1.5a adapter that came with an external HDD encolsure. If I used this external HDD power adapter in the meantime until I get the replacement adapter would I risk causing any harm to the router? I plugged it in and the router seems to power up and the LEDs turn on when I use the 1.5a adapter but I haven't actually set up the router since I'm not sure if its safe to use the 1.5a adapter.