Raspberry Pi's are tested before they leave the manufacturing factory, so a faulty Raspberry Pi is very rare indeed!
We're getting a lot of reports from users seeing a "rainbow splash screen with lightning symbol" - this is caused by an incompatible operating system (see below)
Below are the most common reasons for a Raspberry Pi 3 not to work as expected:
- Operating System (OS) - Only the latest OS release will work on the new Raspberry Pi 3B+ (at time of writing NOOBS v2.7. This needs to be a fresh install!). Your options are..
- Power Supply (PSU) - The new Raspberry Pi 3B+ needs more juice than previous models - You'll need an official 5.1V 2.5A power supply (or equivalent).