I turn on my Lenovo thinkpad t470s, why nothing is displayed on the screen?

Note: If you are not sure whether you heard any beeps, turn off the computer by pressing and holding the power button for four seconds or more. Then turn on the computer and listen again.

Solution: Ensure that:  
– The battery is installed correctly.
– The ac power adapter is connected to the computer and the power cord is plugged into a working electrical outlet.
– The computer is turned on. (Press the power button again for confirmation.)
– The brightness level of the screen is appropriately set.

If a power-on password is set, press any key to display the prompt for the power-on password and then type the correct password and press Enter.

Lenovo thinkpad t470s battery

If you are sure the battery is dead and it is the reason why the laptop won't power on,you can get a new original pack in the link below: https://www.sebatteri.se/thinkpad-t460s-20f90033us-batteri-11.46v-2274mah-lenovo-thinkpad-t460s-20f90033us-laptop-batterier-p-354765.html. This pack is in stock in Germany, so it could reach you in 1 week at most, and it has zero customs duty. Also if you are in the other part of the world, we could arrange the shipment too.