I installed Mint Linux on my laptop (DELL Inspiron, made:2005) but it has no GUI and only boots in text mode. How can I repair it?
Your question is very limited in details.
How did you install it in first place? Which Version of Linux mint? Which desktop? Cinnamon or Mate if it's the latest mint 'maya. Any details regarding specification of your laptop hardware?
Please clarify those points.
If you dont know any of those, dont worry you could try this.
Thinking that what you installed is the latest available edition that is Linux Mint 'Maya'-Cinnamon edition, here may be the solution: Cinnamon requires a decent graphic card.
Recent Nvidia graphic card had issues. If that is the case then you can uninstall the nvidia driver using following command:
sudo apt-get update sudo apt-get install nvidia-current-updates
If the problem is with other graphic driver please check out if there is latest driver available and install those.