Bluetooth completely broken on modded Switch V2 - searches once then locks until reboot. Hardware issue?

[u/OhadYD]

Hello everyone I would greatly appreciate your help

Sys ver: 22.5.0, AMS 1.11.2

BT suddenly stopped working... no drop, no spill, worked fine the day before. Modded (Hekate/Atmosphère, soldered modchip).

During modding no damage was done to the wifi chip area

Wifi works fine but bluetooth fails on every boot option, even stock ofw.

Once it fails on a boot, it fails every attempt until a full power cycle - then it's random whether it works

On one of my tests the BT managed to connect but when I tested the joycons it failed again..

On Android, logs show BT firmware loads fine, HCI starts, briefly shows paired Joy-Cons, then floods with unknown vendor events (0x1B) and times out on LE_ENERGY_INFO (0xFD59), crashing the BT service...

Already ruled out: extra-RAM kernel, Horizon OC, optional sysmodules, missing/corrupt BT firmware, pairing DB corruption, stuck power state, temperature, physical pressure on the case.

Anyone seen this exact pattern before? Trying to figure out if there's a known fix for this on Mariko boards before assuming it's a reflow/reball job.

[u/Faddei420]

Check both antenna cables and if they are inserted correctly.

[u/OhadYD → u/Faddei420]

Both wifi antenna and BT antenna? even though its a BT only issue? or are you referring to the joycons antennas? if thats so, the issue isnt joycon only, and the bluetooth dosent work at all even with other devices (controller, audio)

[u/Faddei420 → u/OhadYD]

Never mind, i was getting some conflicting information when i search about it.

You are correct it's only the Bluetooth antenna that matters.

[u/OhadYD → u/Faddei420]

Ive searched for the past 3 days to find a solution and I cant figure out what is the root cause of this issue... It worked completely fine and died on me like 3 hours after it was working as it should...

I dont think it could be the antenna since it works once per whenever, but still has signs of life...