I still have my iPad Pro 9.7". I far prefer it over my iPad mini 6. However, the battery will not hold a charge. Can I...

When my MBP is idling, the fans go to full speed (6000 rpm) after 5-10 minutes. As soon as I start using the system, the...

The most likely thing that has happened is that, in reassembling your computer, the airport antenna has come loose. That connection is fragile at best, and is easily separated from the connector on the logic board. I urge you to take it back and tell them either to fix it or replace it. It is only 3 weeks old, and I worry that if they have botched the service, they could have messed up other - similar - connectors. Sorry this has happened. I have a MBP that has taken all kinds of abuse.. David

If the airport worked before the service, then it can be claimed to be their fault. However, there are a couple of things to check.. Do you see any bars in the menu bar airport icon? If not, do you see grey lines or a white box. The first means that the airport card is being seen, the second means that it's turned off. You can also look at your system profile report to see if your computer is seeing the airport module. Go to the Apple menu, select "About this Mac", and then "More Information". You'll see a listing of your computer's resources. Have a look in the network section, and see what the listing says about your airport module.. Best Regards David

Suggested troubleshooting: 1. Run Apple System Profiler (Apple Menu > About this Mac > More info) See if the drive is recognized by the system (Is it in the profile under Hardware > Disk Burning)? If it's not, it's either failed or the cable has disconnected. 2. If it is recognized by the system in step 1, try burning a disk through the Finder. If that works, it's a problem with iTunes. Sometimes, burning a disk in Finder cleans up the problems with iTunes. Alternatively, download a fresh copy of iTunes. 3. You can also try to reset the PRAM and open Firmware. You can get those instructions from searching the Apple website. Hope these steps help. David