[laser92awd]

Same rainbow screen, but mine has a workaround. In my case, here's how it's happening and how I get around it:

When I press power button to turn phone on:

Get Red Green Blue White screen with ROM info and "Serial" in white.

Through much trial and error I found out that when this happens:

1) Remove the battery to turn off the power
2) Replace the battery (phone will stay off)
3) Plug in a USB charging cable
4) Wait until the amber led becomes solid indicating charging
5) Turn on power button
The phone will boot normally and not get stuck at the rainbow screen

The bad news is if I ever push reset or power off the phone I'm back to the rainbow screen when it comes back on. I've tried different batteries.

In my case it's very repeatable, I'm planning to take the phone into the Sprint store. I also have many other issues such as a flaky keyboard (double or triple keys sometimes, no response other times), keyboard backlight is completely out all the time, randomly loses all sound including phone earpiece & speaker requiring reset.

Thought I would share.