On a DELL INSPIRON 1525 the first screen you should see is the DELL logo and then Windows Boots up.
If you want to go into the BIOS Setup then it might tell you on the screen with the DELL logo which key to press. Usually for a DELL laptop use the Fn+ESC or Fn+F1 keys to access the BIOS set up. You only get a few seconds to press the keys.
Are you wanting to go into the BIOS Setup to alter the settings for some reason?
lets start from scratch.
By bios screen - you mean the screen which states - press key (?) now to open bios?
(XX)You can not see that screen but it is only a screen with notes on it.
When your pc starts one of the keys will take you to the bios setup.
Even though you can not see the screen at (XX) above the key still works.
You do need to get in bios?It is not for the unskilled - a false move and you will not get your pc to work with out help!
What ever you key is -do you know it? - press it and keep tapping it .