'''4. Check power supply (PSU)'''
*Verify the power supply is not damaged and functions properly.
*If you have another power supply use it to eliminate and determine the failing side.
*In case you use other power supply make sure it provides uninterrupted power and stable grounding.
==Airtop2 BIOS reset:==
*Power down the PC and unplug the power cable.
*Open the service door.
*Remove the disks cartridge.
*Reset the BIOS by pressing the low profile push button SW1 (RTC_RST).
*Mount the disks cartridge and close the door.
*Plug the power and power up the PC (either auto-on or pressing power button).
[[File:Airtop2-bios-reset.gif]]
==Check memory (RAM)==
*Verify RAM modules are installed. The system will not boot without it.
==Check storage (HDD/SSD):==
*Verify power up without storage. Sometimes damaged drives may cause the overall system to malfunction.
==Check power supply (PSU):==
*Verify the power supply is not damaged and functions properly.
*If you have another power supply use it to eliminate and determine the failing side.
*In case you use other power supply make sure it provides uninterrupted power and stable grounding.
