Hi Hansaka,
I would suggest you to clean the air vents with a can of compressed air.
I’d suggest you to run the diagnostics on the computer by following the steps mentioned below and check if there is any issue with the hardware on your system.
- Turn on or restart the computer.
- Immediately at the Dell logo screen, starting tapping the <F12> key once a second until the One Time Boot menu appears (if the computer boots to Windows turn the computer off and try again).
- At the One Time Boot menu, press the <Down> arrow key to highlight Diagnostics, PSA+ or Enter ePSA, then press <Enter> to begin the PSA.
- Write down any error codes listed. Reply to us with the error codes.
Also, please connect known good compatible AC adapter to check if system is stable.
I would suggest you to update the BIOS for issue resolution. Please enter your service tag # on the link below, select the OS, then download the BIOS from BIOS section onto the system and install it.
Please let me know if this helps.