The machine cannot connect to a computer or WiFi, recognize storage, or complete a firmware upgrade.
Unplug the adapter before disconnecting the power switch wiring. Turn off the machine before reconnecting the Type-C cable or opening the top cover to reinsert a USB drive or TF card. Avoid lens cleaners containing ammonia or acetone and back-and-forth rubbing that could scratch the lens; keep dust out of the galvo scanner assembly.
What you see: The machine cannot connect to the computer.
Check in this order:
Check the machine power status:
Confirm the baud rate setting: when using AtomStack Studio, there is no need to set the baud rate manually. When using LightBurn, you need to set the baud rate to 460800 (as shown in Figure 18), or directly import the configuration file in LightBurn. Please refer to the guide for importing the Atelier configuration file into LightBurn, and make sure to select the L1-GALVO controller. The use of LaserGRBL software is not recommended.

Figure 18
Confirm that the computer can recognize the serial port: go to the Device Manager on your computer and check whether the laser engraving machine's serial port (CH340) appears (you can plug and unplug the Type-C cable to see the serial port appear or disappear). If the serial port is not recognized, or if it appears with a warning sign, you can first install the driver. The serial port should display as shown in Figure 19. For driver installation, refer to the Atelier serial port driver video. Driver download links:
Click to play video on YouTube

Figure 19
Check for other software occupying the port: check whether any other software is currently connected to the machine's serial port. If so, please close them.
Check the operating system: on Windows OS, you can connect directly using the Type-C cable. On Mac OS, due to serial port access permissions, you need to use a docking station to convert and connect via the A port of the Type-C cable supplied with the machine, as shown in Figure 20. Note that some Type-C cables are for charging only and cannot transmit data. On Huawei computers, the C port also requires a docking station for conversion; the A port can be connected directly to the engraving machine.

Figure 20
Try using different software: try connecting the machine using AtomStack Studio or LightBurn.
Confirm that the connection cable is functioning properly: try using a Type-C cable that supports data transmission. If the machine can connect after replacing the cable, the issue is with the Type-C cable. Please provide a fault video and the device Serial Number (as shown in Figure 21) and send them to customer service for further handling.

Figure 21
Try using a different computer: try connecting the machine to another computer to see if it can connect normally. Note that for Windows 7, try multiple USB ports and ensure that the serial port driver is installed for each port.
If all the above steps fail, it is considered a mainboard failure: please send the troubleshooting steps, fault video, and device Serial Number to customer service for further handling. For replacement, please refer to the Atelier mainboard replacement video.
Still not fixed? Contact support with the details listed in What to send support.
Related problems: Indicators Stay Off · Red Light at Power-On · WiFi Won’t Connect
What you see: The machine cannot connect via WiFi.
Check in this order:
Check the router: the Atelier WiFi only supports 2.4 GHz. It cannot connect to a 5 GHz network. Switch the router to 2.4 GHz and try again.
Connect via mobile hotspot: if there is no 2.4 GHz router or no WiFi network available, you can use a mobile hotspot to connect and control the Atelier. For connection instructions, refer to the Atelier mobile connection video.
Click to play video on YouTube
Click to play video on YouTube

Figure 36
Still not fixed? Contact support with the details listed in What to send support.
Related problems: Computer Won’t Connect · Firmware Upgrade Fails
What you see: The machine cannot recognize USB drives or TF cards.
Check in this order:
Test recognition function: since the USB drive or TF card is internally connected to the mainboard, you can only check its functionality through AtomStack Studio by navigating to File → Open Device USB Drive to see if the storage function works properly, and whether the size of the storage space is compatible with the available space on the USB drive or TF card (see Figure 49).

Figure 49
Reinsert the USB/TF card: turn off the machine, open the top cover, remove the USB drive or TF card, and then reinsert it. Refer to the Atelier USB/TF card replacement video for guidance.
Click to play video on YouTube
Format the USB/TF card: if reinserting does not resolve the issue, insert the USB drive or TF card into a computer and format it to FAT32.
Replace the USB/TF card: try using another USB drive or TF card. If the new card works properly, the original is considered defective. You can send a video of the fault along with the device Serial Number (see Figure 50) to customer service for assistance.

Figure 50
Replace the mainboard if necessary: if the USB drive or TF card can be recognized and read/written normally on a computer, and formatting does not resolve the issue, the mainboard needs to be replaced. Please send a video of the fault, the troubleshooting steps taken, and the device Serial Number to customer service for assistance. For replacement instructions, refer to the Atelier mainboard replacement video.
Still not fixed? Contact support with the details listed in What to send support.
Related problems: Firmware Upgrade Fails · Computer Won’t Connect
What you see: The firmware upgrade fails.
Check in this order:
Solution: if a new firmware update pushed by AtomStack Studio (PC or mobile version) fails, try the following steps:
Atelier cannot recognize the USB/TF card: refer to the section "Atelier Cannot Recognize USB Drives or TF Cards" for troubleshooting.
Cannot flash the same firmware repeatedly: check whether the firmware you are trying to flash is the same as the current firmware version on your Atelier. If you are unsure, take a screenshot and send it to customer service for confirmation. To check the firmware version, see Figure 51.

Figure 51
Still not fixed? Contact support with the details listed in What to send support.
Related problems: USB or TF Not Recognized · WiFi Won’t Connect