Hi,
With a lack of information regarding what you were doing before hand as far as making any changes to the device goes, or whether you just shut down the night before and then just started the next day. So the best that I can suggest is to have a look at this website to try and identify the code:
https://uxd.zendesk.com/hc/en-us/articles/360019630092-Beep-Codes-Referernce-HP-Desktop-and-Workstation-PCs
It lists a number of causes for the codes mentioned. This should guide you towards finding useful information to post.
Hope this helps