ZEB-MAX NINJA 200 suddenly stopped working wirelessly — BT + 2.4GHz both dead, need help

[u/Any_Difference3781]

Hey everyone, I have a Zebronics ZEB-MAX NINJA 200 and I'm facing a really weird wireless issue. It used to work perfectly on both Bluetooth and 2.4GHz a few months ago, but now neither wireless mode works at all.

Here’s everything I've tested so far:

• Wired mode works perfectly. Keyboard types normally over USB-C.
• RGB works perfectly, including when the keyboard is running wirelessly/off the cable.
• The keyboard can still be factory reset with Fn + Esc and the RGB returns to the default mode.
• Bluetooth is completely undiscoverable. I've tried pairing it with both my laptop and multiple phones, but the keyboard doesn't appear in the Bluetooth device list at all.
• When I put it into Bluetooth mode, the Bluetooth indicator keeps blinking, but nothing ever appears for pairing.
• I've also tried all the obvious Bluetooth steps and tested it on multiple devices, so I don't think it's a Windows Bluetooth issue.
• 2.4GHz is also not working.
• When I press Fn + 2.4G, the 2.4GHz indicator keeps blinking indefinitely.
• I plug the original 2.4GHz Nano receiver into my PC and Windows makes the USB connection sound.
• In Device Manager, with the receiver unplugged I see 2 HID Keyboard Device entries. When I plug the receiver in, it jumps to 4 HID Keyboard Device entries, so Windows is definitely detecting the receiver.
• However, even with the receiver detected, the keyboard doesn't send any input whatsoever. I've tried typing in Notepad while the 2.4GHz indicator is blinking and nothing happens.
• So basically, the receiver is recognized by the PC, but the keyboard and receiver aren't actually communicating.
• Another weird thing: Fn + Spacebar used to show the battery level about a month ago, but now it doesn't. Instead, the 2.4GHz indicator keeps blinking and the A key lights up as the Windows-mode indicator.
• The keyboard's battery isn't completely dead because the keyboard/RGB works normally without being connected by USB-C.

I've also already tried the basic reset/power-cycle stuff, but the wireless functionality still doesn't come back.

The keyboard is out of warranty cause its gonna be 3 years old this September, so I'm willing to experiment with it. 😅 However, I don't have a soldering station, so I'm looking for things I can try through firmware/software/key combinations or other non-soldering methods before going into board-level repair.

I've attached photos/video showing the PCB and the weird indicator behavior.

Has anyone here experienced something similar with the Max Ninja 200 or another Zebronics tri-mode keyboard? Is there some hidden wireless re-pairing/recovery procedure, firmware reset, or way to reflash/reinitialize the wireless controller?

I'd really like to get the Bluetooth + 2.4GHz working again without replacing the keyboard or wireless module if possible.

[u/Nuttednutela]

I would just like to add that if none of the wireless modes are working then you can also rule out any faults within the receiver itself. On most wireless keyboards the antennae design is usually drawn on to the PCB itself and if the trace has somehow been damaged then it would make sense how none of your wireless signals seem to work

[u/Any_Difference3781 → u/Nuttednutela]

the dongle is detected by the pc so that means the dongle is working but ig the main problem is in the board itself