== =[https://fit-pc.com/wiki/index.php?title=Airtop3_Troubleshooting_-_I_can%27t_turn_on_the_computer,_it_doesn%27t_wake_up I can't turn on the computer, it doesn't wake up ] ===
* Please use the ===[[Airtop2 LED behavior description | Airtop3 LED behavior description]] for further diagnosticshttps://fit-pc.com/wiki/index.php?title=Troubleshooting_Airtop3_Symptom:_I_don%27t_have_any_display_output,_there%27s_nothing_on_the_screen I don't have any display output, there''LED Diagnostics feature is available only for models configured s nothing on the with FM-AT3 FACE module'''screen] ===
===1. Check power supply (PSU)===
*Make sure the LED 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 Airtop3.
===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-AT3 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. Airtop3 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]]
'''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-AT3 FACE module'''
== I don't have any display output, there's nothing on the screen ==
===1. Screen functionality and connectivity===
* 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-AT3 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/Airtop3_Troubleshooting#2._Check_memory_.28RAM.29 Check memory RAM] to diagnose Memory
[[Category:Airtop3]]
