Rock 5B not loading

I have installed Debian Bullseye KDE B39 img for Rock 5B on my SD card using Win32Disk flasher. After inserting it on the board, green and blue light indicates the disk reads but is not blinking. I have tried multiple times with multiple SD cards. Sometimes the display shows error messages like ‘pwm fan failed’. How should I proceed?
P.S. Only one time have we seen the interface using the same OS

Do you have the same problem using this image? https://github.com/radxa-build/rock-5b/releases/download/rsdk-b5/rock-5b_bookworm_kde_b5.output.img.xz

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This is an expected warning and does not affect startup

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It is loading a series of codes for a long time.

Do you have a usb to serial module? I would like to see the serial logs

I changed the SD card now it is working. Thank you really. In case if this problem comes again, can you how to access the boot logs?.