How to Test a Lenovo R400
- 1). Turn on your Lenovo ThinkPad R400 and listen for one single beep. If your Lenovo ThinkPad R400 pasts the power-on self-test (POST) it will deliver one beep through the computer speakers. If it does not pass POST, you will hear a sequence of beeps.
- 2). Wait and see if Windows loads properly.
- 3). Press the blue "Thinkvantage" button located above your keyboard. The Thinkvantage button will run a diagnostic on your computer and alert you to any potential errors.
- 4). Allow the diagnostic to complete and see if it reported any errors.