Changes
* Please use the [[Airtop2 LED behavior description]] for further diagnostics.'''1. Check power supply (PSU)LED Diagnostics feature is available only for models configured the with FM-AT2 FACE module'''*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.
===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.
*Power down the PC and unplug the power cable.
*Open the service door.
*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-AT2 FACE module'''
== Airtop2 with Linux starts up with flickering/bad display ==
* [[Airtop2 running on embedded GPU is flickering/bad display on Linux]]
== 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-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
[[Category:Airtop2]]
