Bsrgvty

2 days ago my Bluetooth stopped working on my PC, and I tried booting to the Ubuntu installation disk and it also didn't work (it also didn't work on Windows). Today, I turned on my computer to find that Bluetooth suddenly started working again. At the moment, my Bluetooth keeps turning on and off randomly. Could this be a hardware issue or a software issue? I'm thinking it could be hardware because of the fact that it doesn't work in Windows at the same time that it doesn't work in Linux, and how could I diagnose a Bluetooth hardware issue?

This is not a duplicate: Bluetooth randomly cutting out in Ubuntu

The reason is because my Bluetooth isn't restored when I restart my PC.

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Update:

I found a loose 2.5v capacitor (I think, it's part number is damaged) with it's mount missing and the connections loose. I tested my computer and it boots without the component. But it means part of my computer isn't getting it's effects, and I'm not sure where it came from (could it reduce lifespan?). The bios did reset (probably because I disconnected the battery), but for now Bluetooth works. Btw sound, gpu, usb, WiFi, and everything that I tested work. I won't answer this question right now, because I'm not completely sure yet that the Bluetooth will work reliably.

Update 2:

Nothing is different, Bluetooth is still working unreliably. I turned on my PC today and Bluetooth is off.

Update 3:

I tried to replace the WiFi/Bluetooth module, but now the screw is broken and I can't easily remove it. The bluetooth seems to be working now, but the wifi is down and the only way to use it is to use a wifi dongle.

Command output:

sudo service bluetooth status:

● bluetooth.service - Bluetooth service
 Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
 Active: active (running) since Sat 2019-04-06 16:22:58 AEDT; 4 days ago
 Docs: man:bluetoothd(8)
 Main PID: 1246 (bluetoothd)
 Status: "Running"
 Tasks: 1 (limit: 4915)
 CGroup: /system.slice/bluetooth.service
 └─1246 /usr/lib/bluetooth/bluetoothd

Apr 10 13:23:29 josua-Satellite-L50-C bluetoothd[1246]: audio-avrcp-target: Protocol not supported (93)
Apr 10 13:23:29 josua-Satellite-L50-C bluetoothd[1246]: L2CAP server failed for Message Notification: setsockopt(L2CAP_OPTIONS): Invalid argumment (22)
Apr 10 13:23:29 josua-Satellite-L50-C bluetoothd[1246]: L2CAP server failed for Message Access: setsockopt(L2CAP_OPTIONS): Invalid argument (22) 
Apr 10 13:23:29 josua-Satellite-L50-C bluetoothd[1246]: L2CAP server failed for Phone Book Access: setsockopt(L2CAP_OPTIONS): Invalid argument (22)
Apr 10 13:23:29 josua-Satellite-L50-C bluetoothd[1246]: L2CAP server failed for File Transfer: setsockopt(L2CAP_OPTIONS): Invalid argument (22) 
Apr 10 13:23:29 josua-Satellite-L50-C bluetoothd[1246]: L2CAP server failed for Object Push: setsockopt(L2CAP_OPTIONS): Invalid argument (22)
Apr 10 13:23:31 josua-Satellite-L50-C bluetoothd[1246]: Endpoint registered: sender=:1.84 path=/MediaEndpoint/A2DPSource
Apr 10 13:23:31 josua-Satellite-L50-C bluetoothd[1246]: Endpoint registered: sender=:1.84 path=/MediaEndpoint/A2DPSink
Apr 10 15:31:00 josua-Satellite-L50-C bluetoothd[1246]: Endpoint unregistered: sender=:1.84 path=/MediaEndpoint/A2DPSource
Apr 10 15:31:00 josua-Satellite-L50-C bluetoothd[1246]: Endpoint unregistered: sender=:1.84 path=/MediaEndpoint/A2DPSink

rfkill:

ID TYPE DEVICE SOFT HARD
 0 bluetooth Toshiba Bluetooth unblocked unblocked
17 wlan phy2 unblocked unblocked

note: at the time of writing these commands, the Bluetooth isn't working, but the wifi is working.

I executed sudo service bluetooth restart and sudo rfkill unblock bluetooth, while Bluetooth wasn't working, and executed the same commands as before:

josua@josua-Satellite-L50-C:~$ sudo service bluetooth status
● bluetooth.service - Bluetooth service
 Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
 Active: inactive (dead)
 Docs: man:bluetoothd(8)

josua@josua-Satellite-L50-C:~$ sudo rfkill
ID TYPE DEVICE SOFT HARD
 0 bluetooth Toshiba Bluetooth unblocked unblocked
 1 wlan phy0 unblocked unblocked

I tried executing sudo service bluetooth start as well and I got the same result.