| Problem | Cause | Solution |
|---|---|---|
| Nothing is shown on the LCD | LCD not connected to AVR | Connect the flat cable between the AVR SEGMEN PINS and LCD PINS connectors. See Using the LCD. |
| Faulty LCD initialization |
Check your code that initializes the LCD driver. The Application Note "AVR065 LCD driver for the STK502 LCD" describes how to control the LCD-display. |
|
| The update frequency is not correct | Check the clock prescaling in your initialization. Check that the clock source selected on STK504 is correct. See STK504 Clock Sources for more information. | |
| Some LCD segments seem stuck | Some of the port pins used for driving the LCD are also connected to something else | Check that the pins used to drive the LCD are not connected to something else on either STK500 or STK504. |