Hi dedahl,
Please run a hardware diagnostics to check for hardware issues. Kindly find the steps below to perform the Hardware diagnostics.
Turn the computer off >restart the computer , At the Dell logo screen, start tapping the F12 key a few times until you see the ‘One Time Boot Menu’ appear. At the one time boot menu, press the down arrow key to highlight ‘Diagnostic’, and then press Enter to begin the PSA diagnostics. If the test fails, please make a note of any error codes listed. You can also refer to the link below.
Also try some of the steps mentioned in the below thread.