I have this old notebook that still functions admirably after all these years. I do back up the HDD regularly and I take an ISO image every 3-6 months or so.
I discovered this HDD Self Test recently in BIOS-> Diagnostics-> and I tried it. Test 1 and Test 2 (quick tests) were "Successful". Test 3 (the comprehensive and long one) was completed and gave me "Failing attribute ID=16".