Question 5 beeps no bios

Jan 2, 2024
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hello,
mobo Gygabyte B660M DS3H DDR4
processort Intel I5 12400F
8 GB memory
SSD 1 TB

The problem is when starting 5x beeps, no video. Fans PSU, processor and system working. I can not get in the Bios. I removed the GPU card and the other 3 memory banks. Als the M2 memory was removed. Problem still the same.
What is broke the Mobo or the CPU. Don't have second MoBo or processor to test
regards
Jos