Pavilion won’t turn on, fan runs

[Dvrichard]

My pavilion laptop was running fine until I plugged in an Arduino Mega to the USB port. Then the screen went blank and in could hear the fan running, but no disk activity. When I pressed the power button there was no response, the fan kept running, I took the battery out, held down the power key for 30 seconds, reinserted the battery and still when I pressed the power button, only the fan noise was there, the laptop wouldn’t boot.

 Any suggestions?

[Echo_Lake]

@Dvrichard

Thank you for posting on HP Support Community.

Don't worry as I'll be glad to help, I have a few troubleshooting steps we could try to fix the issue:  

Firstly, let's reseat the hard drive and memory.

1. Press and hold the Power button for 5 - 15 seconds to turn off the computer.
2. Disconnect the power cable.
3. If your notebook model features a removable battery, remove the battery.
4. Disconnect and reconnect the internal hard drive and Memory. For instructions, see the Maintenance and Service Guide for your notebook model. Locate these in the User Guides section of your notebook product page on the HP Customer Support website.
5. After connecting the hard drive and reassembling the computer, try to start the computer normally.

If reseating the hard drive and memory does not resolve the problem, you might also consider contacting support for repair due to a possible hardware system board failure. HP Support can be reached by clicking on the following link: www.hp.com/contacthp/

Hope this helps! Keep me posted for further assistance.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.