Try to eliminate interconnections if possible. Try other USB cables to see if it makes a difference.

If you are certain your power supply is good, then make sure all your USB cables have at least 24 AWG power wires, and keep them as short as possible to minimise resistive losses. Check if the power supply is rated for at least 5V at 1A, and try some other power supplies if you have any available. Lots of people use phone chargers to power their Pi, and some phone chargers have very poor voltage regulation which can cause unstable behavior in the Pi. It can be tricky to solve a power problem with the Pi-Zero because it often has more interconnections than the mainstream Pi computers.įirst and foremost, make sure your power supply is adequate. Power problems can be caused by the power supply, the USB cable connecting the power supply, a USB hub (if you are using one), the USB cable connecting the hub, the OTG adapter connecting the USB cable, etc. However, if you don't solve the power problem and you ask the Pi to perform some heavy task, the keyboard and/or mouse are likely to disconnect again, or the whole system will crash. After the boot process is done the Pi requires less power, so when you disconnect and reconnect them the Pi sees them and they work. What is likely happening is that during the boot process there isn't enough power to run the Pi and the USB keyboard+mouse, so those components aren't detected by the Pi. The Pi will use more power while booting up than when it is idle or not working too hard. Hard to nail down exactly what is causing it because you didn't offer any details about your setup.

Silvercrest mini usb hub driver