Hi@Jakayla, Welcome to the HP Support Community!
Thank you for visiting the HP Forums! A great place where you can find solutions for your issues with help from the community! I came across your post and wanted to assist you. I understand you are having issues not Booting your HP Stream 14, Don't worry we'll work together to find a solution for you.
No power - turns off every few seconds(notebook):
Let’s start with the below steps:
Perform a hard reset (click here for details)
If the computer still turns off every few seconds, try with an alternate adapter and/or remove the battery and try turning on the computer without the battery,
Only connect the adapter and start.
Hope this helps! Keep me posted.
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Have a great day!