Question HP AIO does not POST with a RAM stick in second slot.

Jul 9, 2022
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Good people, PC pros.
I have an All in One HP that has two RAM slots but in that second slot when connecting any stick, whether it is the same one that comes with the machine or a new one, the PC does not enter the post and even the HDD does not boot.
The exact model is HP 22-B402LA, according to the PC's datasheet it has dual channel support but for some reason the PC won't boot with a stick in that slot.
Sorry for the bad english btw.