Before you send it: back it up if you can.
If the computer still turns on, copy your photos and documents to an external drive or a cloud account before any repair, here or anywhere. Most repairs never touch your files, but a drive that's starting to fail can stop working at any time.
If it won't turn on, don't keep trying. Note what it does (lights, beeps, fans, nothing) and put that in your request.
Getting files off a dead computer