Dell Technology Guide
Page 272
...and turn off or light in a certain sequence to indicate status and problems. See your Service Manual for laptop computers System messages Windows Hardware Troubleshooter Dell Diagnostics Function The power button light illuminates and blinks or remains solid to resolve the problem. These lights function...the message in the System Messages list or in conjunction with the power lights. With the Dell Diagnostics, the computer runs the Pre-boot System Assessment (PSA), a series of initial tests of the troubleshooting tools you may display messages indicating errors or problems, which...
...and turn off or light in a certain sequence to indicate status and problems. See your Service Manual for laptop computers System messages Windows Hardware Troubleshooter Dell Diagnostics Function The power button light illuminates and blinks or remains solid to resolve the problem. These lights function...the message in the System Messages list or in conjunction with the power lights. With the Dell Diagnostics, the computer runs the Pre-boot System Assessment (PSA), a series of initial tests of the troubleshooting tools you may display messages indicating errors or problems, which...