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I have this Raspberry Pi 3 and I haven't used it in 2-3 months but I wanted to revive it by using it as a Home server. So, I booted it up with my Power supply and it tries to boot and after couple of seconds, it keeps on rebooting. I thought my power supply wasn't enough, so I tried it on my Raspberry Pi 2 and it worked fine! I even thought it was a problem with the SD card but it booted fine on my Raspberry Pi 2. Any help would be appreciated!
Thanks, Randy
Is a rainbow square visible on the top right hand side? If so, it is a power issue, you should probably try using a different adapter. For best results, use one rated at least 5V 2A (but you mentioned your other Pi works, so this is unlikely).
To make sure it's not a corrupt file system/SD card try getting a brand new SD card and flashing a new OS.
The Pi2/Pi3 OS should be interchangeable but I would definitely run a sudo apt-get update and a sudo apt-get dist-upgrade, to make sure it's on the latest firmware.
