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8 Krypton

Re: Inspiron 15R SE 7520 beeping/wont boot

1 Beep usually means a BIOS ROM failure problem. Check the following page. Probably a bad main board. You could try removing the CMOS battery for 5 minutes and then reinstalling or replace the battery but I suspect it will be the main board.

https://www.parts-people.com/blog/2014/06/27/dell-inspiron-15r-7520-beep-codes-diagnostic-indicators...

 

 




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