![]() For information about Desktop LED codes, see the table in your computers User Manual or check out these articles:ĭiagnostic Indicators (Inspiron Desktops),ĭiagnostic Indicators (OptiPlex Desktops),ĭiagnostic Indicators (Dell Precision Workstations.).Understanding Beep Codes on a Dell Desktop or All-in-One PC For information about computer beep codes, see the table in your computers User Manual or have a look at this article:. #Laptop screen lights up but no display installRemove all attached components, reattach the PSU cables and using the PSU test button, install each component individually to test.
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