== =[https://fit-pc.com/wiki/index.php?title=Airtop2_Troubleshooting_-_I_can%27t_turn_on_the_computer,_it_doesn%27t_wake_up <span style="color:green">I can't turn on the computer, it doesn't wake up </span>] ===
* Please use the ===[[Airtop2 LED behavior description]] for further diagnosticshttps://fit-pc.'''LED Diagnostics feature is available only for models configured the com/wiki/index.php?title=Airtop2_with_Linux_starts_up_with_flickering/bad_display <span style="color:green">Airtop2 with FM-AT2 FACE module'''Linux starts up with flickering/bad display</span>] ===
===1[https://fit-pc. Check power supply (PSU)com/wiki/index.php?title=Airtop2_Troubleshooting_-_I_don%27t_have_any_display_output,_there%27s_nothing_on_the_screen <span style==*Make sure the LED "color:green">I don't have any display output, there's nothing on the power brick is lit.*Make sure the DC cable is not damaged and connected properly to the machine.*Make sure the AC cord is properly plugged to both sides (power brick and to the wall).*Try to plug the DC cable to the alternative DC socket on the Airtop2.screen</span>] ===
===2. Check memory (RAM)===
*Verify diagnostic LED (R) lit <span style="background:Green">Green</span>*.
*If lit in <span style="background:yellow">Yellow</span> it means memory initialization has failed.
*Verify RAM modules seated correctly and firmly in their respective sockets.
*Try to eliminate faulty memory sticks by swapping them with one another.
'''*LED Diagnostics feature is available only for models configured the with FM-AT2 FACE module'''
===3. Check Peripherals (HDD/SSD/USB)===*Unplug peripherals and try to power up with bare minimum, that includes HDD/SSD/USB devices.*Verify power up without storage. Sometimes damaged drives may cause the overall system to malfunction. ===4. 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).[[FileCategory:Airtop2-bios-reset.gif]] '''LED-B (BIOS)*''' This LED is <span style="background:yellow">Yellow</span> after display initialization. If BIOS setup menu is needed, the DEL button is functional from the moment the B-LED is <span style="background:yellow">Yellow</span>. The B-LED is <span style="background:Green">Green</span> when the OS takes charge of the system. '''*LED Diagnostics feature is available only for models configured the with FM-AT2 FACE module''' == I don't have any display output, there's nothing on the screen == ===1.Screen functionality===* Make sure both power and display cables are connected firmly on both sides.* Advise the H(Hdmi)/D(Display port) LEDS, <span style="background:Green">Green</span> means the cable is connected to the monitor properly.** Make sure the screen is turned On and is functioning.* The best way to check screen functionality is by connecting to a good known working machine.'''*LED Diagnostics feature is available only for models configured the with FM-AT2 FACE module'''===2. Validate memory===*Display issues on POST are a common symptom of incorrectly assembled or bad Memory DIMMS*Please refer to [http://fit-pc.com/wiki/index.php/Airtop2_Troubleshooting#2._Check_memory_.28RAM.29 Check memory RAM] to diagnose Memory
