In Dell Laptops Lock LEDs are the indicators of failures. If you can reply with the pattern displayed by the Lock LEDs such as On-Off-Blinking, etc., I can try to look up the knowledge base for details. Also add the exact System Model Number of your Dell Laptop in your reply.
Please do write back to us.
To know more about Dell's products, services and drivers & downloads, please go to http://dell.to/YBlak6