No factory remote i can't acess to the menu system

Most televisions and monitors have a menu button next to the power, volume, and channel buttons on the face, top, or side of the set. It can be a pain but you can usually press the menu button to bring the menu up and then select and change settings by pressing menu again to choose a setting and using the channel and/or volume up and down buttons to raise or lower the setting. The exact function varies based on the set so you may need to fiddle around a bit. Unfortunately some sets do require the remote to perform some functions.