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Keyboard on Dell Inspiron 24-7459 are not working

The pc out of warranty. When I open the pc it show me .Alert Keyboard initialisation failure . I change the battery but the keyboard are not working I shut down and open maybe more than 10 times I check on settings keyboard and troubleshooting and all is good I installed on my pc from dell site system recovery something like that and scan the pc but nothing to fins something After opened it show me Alert keyboard initialisation failure. And in the right size down show me .Continue/Bios setup/Diagnostic/ I opened bios setup I don’t know what to do theere and after I stop that and I opened Diagnostic and the pc star work on system recovery hardware and check for about 3 hours but nothig changes . In final took around 4-5 hours to find what is happening but nothing solved. I think is a keyboard issue but what be cause move the button on open and close and that are working , So what can be ? Is someone who know something about ?

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