My name is Jaspreet and I work for the Social Media and Community Team at Dell. As per the information provided as you start your computer you are getting 2 beeps .Please follow the below mentioned steps:
• Start the computer and keep tapping F2 (for BIOS) and F12 (for boot menu).
• If you are able to access boot menu select the diagnostics option and run the diagnostics and reply back with the error code.
If you are not able to access F2 or F12 please reseat the memory and then try to start the computer. To reseat the memory follow the link: http://tinyurl.com/ycrpu4e
Please revert back in case you need any clarifications.