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After flashing Raspberry Pi OS, the Pi does not boot and shows a rainbow screen. What is the most probable cause?

medium📝 Debug Q7 of 15
Raspberry Pi - Platform
After flashing Raspberry Pi OS, the Pi does not boot and shows a rainbow screen. What is the most probable cause?
AMonitor resolution too low
BIncorrect HDMI cable connected
CPower supply voltage too high
DCorrupted or incomplete OS image on the microSD card
Step-by-Step Solution
Solution:

  1. Step 1: Understand the rainbow screen meaning

    The rainbow screen on Raspberry Pi indicates the GPU is powered but cannot find a valid boot image.

  2. Step 2: Identify common causes

    This usually happens due to corrupted or incomplete OS image on the microSD card.

  3. Final Answer:

    Corrupted or incomplete OS image on the microSD card -> Option D

  4. Quick Check:

    Rainbow screen cause = bad OS image [OK]
Quick Trick: Rainbow screen means boot image problem [OK]
Common Mistakes:
  • Blaming HDMI or monitor settings
  • Ignoring image corruption

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