Inspiron 5477 and Optiplex 7460 All In One may experience Panel Failure symptoms include following symptoms:
This symptom occurs when the Touch Screen function was accidentally disabled by Windows 10 OS (Operating System) when the system is attempting to resume from the Sleep Mode.
The issue can be seen in ePSA , BIOS screen, LCD BIST etc.
This issue could be reported randomly on:
Follow the instructions below to resolve this issue:
Download the firmware updater tool from the following link and follow the on-screen instructions to complete the firmware update, https://www.dell.com/support/home/drivers/driversdetails?driverId=81M7D
Run the Scalar Firmware Update Tool, it can be downloaded from the following link, https://www.dell.com/support/home/drivers/driversdetails?driverId=F6NV7.
Run the rolling pattern tool from the following link and wait for 2 hours, after 2 hours press the Esc button to quit the application and restart the computer to complete the updates, https://www.dell.com/support/home/drivers/driversdetails?driverId=R6TNF