Hey timothymn,
Thanks for the question. If I understand correctly, the iPhone boots to the Apple logo and then to a blue screen. I would recommend that you read these articles, they may be helpful in troubleshooting your issue.
Doesn't start past the Apple logo
If your iPhone, iPad, or iPod touch doesn't respond or doesn't turn on - Apple Support
You see a solid color screen (black, white or blue)
Get help with the screen on your iPhone, iPad, or iPod touch - Apple Support
- Reset your device while it's plugged in.
- If resetting doesn’t fix the issue, restore your device.
- If you still see the issue after you restore, contact Apple Support.
Thanks for using Apple Support Communities.
Have a good one,
Mario