If you are unable to login/access/get in to tengoPOS on your till/computer from the login screen shown below, there are a couple of usual issues. Most common, is the focus of the till/computer is not in the login box – tap inside the box as shown below and the line (cursor) will flash, meaning it is ready for your login (If it is not the screen below you are stuck on, you may be at the Windows login page – see guide here for this).

If you are scanning to login, if nothing appears when you scan, then try unplugging and reconnecting the barcode scanner. If nothing appear still then you may have a faulty scanner, you can try another one if you have one, or just type your number in and type enter. All a barcode scanner does is types in the number and presses enter, this can be replicated using the keyboard.
If circles appear (numbers are represented by solid circles so your code isn’t displayed) but it doesn’t log you in, then check you are using the right barcode. User login barcodes always start with the numbers 254, eg 254123456789, so if your barcode doesn’t start with 254 you don’t have a valid login code and you will need to ask whoever administers users in your organisation to print another one for you (covered in adding/editting users guide here).
If you are typing a password, you may have num lock on the keyboard. See guide here for help on this.
The only other things are, your user account has been restricted (contact your administrator), or if typing in a number, you may have num lock on the keyboard which can mean you’re not actually typing the correct number in – see guide here about this.
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