If the screen on your TV is flickering, the first thing to do is determine what the cause is. We can do this with some simple testing.
Click Run to launch the software. Dell System Detect will display your service tag and computer model number. 5. Visit the Dell Product Support for Home Users page (link in Resources). Enter your Service Tag number in the applicable box and click Submit.. A new page displays more information about your desktop model.
OptiPlex, Precision, Vostro. 1  Press F2 when the Dell logo appears. Press every few seconds until the message Entering Setup appears. 2  Older Dell desktops and laptops may instead use Ctrl+Alt+Enter or Del to enter BIOS. 3  Older Dell laptops may use Fn+Esc or Fn+F1.