In my laptop its showing no bootable device

[Yashwanth2]

No bootable device press any key 

After upgrading my ram it was showing this thing

[Echo_Lake]

@Yashwanth2
Thank you for posting on the HP Support Community.

• Have you tried with the old Ram?
• Are you getting any error message "no boot device found" 3F0?

I have a few troubleshooting steps we could try to fix the issue:  
Test the hardware using HP PC Hardware Diagnostics

1. Plug the AC adapter into the computer.
2. Press the Power button for at least five seconds to turn off the computer.
3. Turn on the computer and start pressing Esc repeatedly, about once every second. When the menu appears, press the F2 key.
4. When the HP PC Hardware Diagnostics menu displays, click Component Tests.
5. In the Component Tests menu, click Ram or Memory test
6. Click the Quick Test.
7. Click Run once to start the test.

Hope this helps! Keep me posted for further assistance.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.