Question SSD & HDD Boot Confusion

[canraps]

Hello!
In my laptop i had a SATA HDD drive with windows 10 on it. Then i bought a SSD drive, and switched SATA HDD to optical dock and SSD to the normal drive slot. I installed windows 10 to the SSD drive without SATA HDD was connected. Everything was alright there was no problem for 1 year. Then the laptops motherboard charger socket had a fault so i have delivered my laptop to the technician. The guys fixed the socket problem but now the windows 10 is booting from the old SATA HDD, not the SSD drive. When i try to force it to boot from SSD, it says it cannot boot!
When i boot from the old drive, i can see all my files including the SSD drive. How can i go back to my original boot so that i can boot from SSD drive. Somehow it seems that after the mainboard repair, Windows 10 got confused with booting. Please help me out, im kind of desperate 🙁

This is the picture of my disk management screen. Disk 0 is SSD and drive is E
Disk 1 is SATA HDD drive letters are C and D.

 

[Lutfij]

It might be possible that the people you gave the laptop for repair, reinstalled the OS onto your HDD. You could try and remove the HDD from the laptop(after it's powered down, ofc) and see if powering off your SSD alone allows you to go into the OS. Most likely the drive was cleaned and reinstalled.

FYI, you should've left the HDD in it's original spot and had the SSD in the ODD caddy since SSD's don't dump heat into the system. The HDD in an ODD slot will heat up and the lack of airflow can damage the drive.

 

[canraps]

Lutfij i can %100 confirm that the guys did nothing to the SSD & HDD because i can see all my files in SSD are there. They did not install anything i also talked with them. I had to login using my old windows password to boot from SATA HDD.

One thing i will try is to remove the SATA HDD and try booting it up.

Any other suggestions in case it does not work ?

 

[canraps]

Case can be closed. To who wonders how i solved the problem:
I disconnected SATA HDD from optical drive bay. Fired up SSD, doesnt log in again. Plugged the usb drive which have windows 10 uefi boot. Clicked repair computer and from the settings i clicked repair startup. It did some process but at the end it said it couldnt resolve problem however problem was solved! When i restarted the PC, The ssd was booting up ! After i checked everything was ok, i plugged the SATA HDD drive back to optical drive bay.