===I can't turn on the computer, it doesn't wake up?===
* Pay Attention under each section to it's Please use the [[Airtop2 LED behavior description]] for further diagnostics.'''LED Diagnostics feature is available only for models configured the with FM-AT2 FACE module'''
'''===1. Check power supply (PSU)'''===*Verify Make sure the LED on the power supply brick is lit.*Make sure the DC cable is not damaged and functions connected properlyto the machine.*If you have another power supply use it Make sure the AC cord is properly plugged to eliminate both sides (power brick and determine to the failing sidewall).*In case you use other power supply make sure it provides uninterrupted power and stable groundingTry to plug the DC cable to the alternative DC socket on the Airtop2.
'''===2. Check memory (RAM)'''===*Verify RAM modules are installeddiagnostic LED (R) lit <span style="background:Green">Green</span>*. The system will not boot without *If lit in <span style="background:yellow">Yellow</span> itmeans memory initialization has failed.*Also Swapping DIMMS with a good known working ones could Verify RAM modules seated correctly and firmly in their respective sockets.*Try to eliminate faulty memory stick issuessticks by swapping them with one another.
'''*LEDDiagnostics feature is available only for models configured the with FM-R (RAM)AT2 FACE module''' This LED turns <span style="background:green">Green</span>, the moment the memory initialization is successful. This LED is <span style="background:yellow">Yellow</span> while the memory initialization is in progress. If the memory initialization has failed, for example: There is no DIMM installed / the DIMM is not supported - the R LED will stay <span style="background:yellow">Yellow</span>. The R-LED should stay <span style="background:Green">Green</span> at normal operation, also after BIOS POST is over.
'''===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.
*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 == * [[File:Airtop2running 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-biosAT2 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-resetpc.gifcom/wiki/index.php/Airtop2_Troubleshooting#2._Check_memory_.28RAM.29 Check memory RAM] to diagnose Memory [[Category:Airtop2]]
