I tried to powerwash a managed samsung 303 chromebook. Now I cant access without an admin password.
You should be guided through the login as you did when you originally received the computer.
Please refer to the instructions at the Samsung link below.
If this doesn't fix the problem, please let us know.
Thanks but this unit does not allow me to go to developer mode and asks for a password. The previous user is unreachable.
When you "powerwashed" it, you should be setting it back to factory settings or resetting it. I'm not sure what you mean about "previous user." Was this a previous owner and now you own it?
Did you do this?
1. Turn on the device and wait to be presented with the sign-in screen. Do not login.
2. Press Ctrl+Alt+Shift+R.
3. You will be presented with a large onscreen warning. Click ‘Restart’ to initiate the process.
Note: I'm sorry, but I do not have access to this type of machine to test any of this out.