How we test parts
We test used parts in a working computer before we take it apart, and we inspect every new part and test samples of each batch.
Used parts
Most of our used parts come from working computers. We test each computer while it is still whole, so that every part is tested in place.
- We start with Apple Service Diagnostic (ASD), Apple’s own test software for each model and year.
- ASD does not test everything, so our technicians then run tests of their own to cover what it misses.
- By the end, we have checked the screen closely, tested each port, read the logic board’s sensors, and recorded two full pages of results, checked twice, to show which parts work.
Then we take the computer apart. Each part is cleaned, marked with our quality control label and packed for sale.
New parts
- We inspect every new part for signs of a defect.
- We test 5% to 10% of each batch we receive, to check the batch.
- We test every unit of a part with a history of problems, of a complex part that can fail in part, and of a part that takes a long time to install. Nobody wants to find a fault after two hours of installation.
To see how we grade used parts, read Condition grades for used parts.