Changed my battery out and now I have no sound

Support Sound
1

According to the speaker icon in the taskbar I have no output or input device.
I think I may have damaged the motherboard accidentally or knocked a ribbon cable loose even though all cables seem to be intact.

My question is, is there a way to know if I have a motherboard issue or something else.
The only thing I know I did is initially I put the battery cable in backwards when I first installed the battery ( yes it let me without forcing it). I plugged the AC power in and started the laptop and it said there was no battery. I discovered I had the cable upside down and put it in correctly and it worked fine. I then discovered I had no sound.
Windows also reports the same error message.
This is obviously a Laptop.
I reopened the case and examined the wires. The only one I disconnected was the battery cable and the right speaker cable. All is back connected .
Any ideas what to try?
I looked up the motherboard for this laptop and it is over $300 to purchase.
Also it is a pretty complicated to replace the board. a lot of small ribbon cables to disconnect and reconnect.
So if I can’t fix this I think I will just do without sound.

2

perhaps go through your Bios/Uefi setup again

disconnecting/changing the battery will likely reset it to some default

connecting the battery the wrong way/polarity could indeed cause damage (!)
(it hopefully won’t, but it can)

whether that is the case is anyones guess

go into and through Bios/Uefi setup …

it’s unlikely that wrong polarity would have just affected/damaged the sound part of the board
but not impossible

in a laptop board it’s easy to miss one very tiny small connector when re-assembling

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3

This was my first thought.

Depending on the actual build and disassembly process we could be talking about some connection that was not refitted or something that was accidentally nudged out.

But the only advice for that is to recheck all connections.

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4

If audio device is not shown in either:

aplay -l

or

lspci

it is likely a motherboard/hardware issue

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5

Before I take the cover off again here is the result of those commands:
What to you think?

[demo@Manjaro ~]$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: sofhdadsp [sof-hda-dsp], device 1: HDMI1 (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: sofhdadsp [sof-hda-dsp], device 2: HDMI2 (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: sofhdadsp [sof-hda-dsp], device 3: HDMI3 (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
[demo@Manjaro ~]$
[demo@Manjaro ~]$ lspci
00:00.0 Host bridge: Intel Corporation Comet Lake-U v1 4c Host Bridge/DRAM Controller (rev 0c)
00:02.0 VGA compatible controller: Intel Corporation CometLake-U GT2 [UHD Graphics] (rev 02)
00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 0c)
00:12.0 Signal processing controller: Intel Corporation Comet Lake Thermal Subsytem
00:13.0 Serial controller: Intel Corporation Comet Lake Integrated Sensor Solution
00:14.0 USB controller: Intel Corporation Comet Lake PCH-LP USB 3.1 xHCI Host Controller
00:14.2 RAM memory: Intel Corporation Comet Lake PCH-LP Shared SRAM
00:14.3 Network controller: Intel Corporation Comet Lake PCH-LP CNVi WiFi
00:15.0 Serial bus controller: Intel Corporation Serial IO I2C Host Controller
00:15.1 Serial bus controller: Intel Corporation Comet Lake Serial IO I2C Host Controller
00:16.0 Communication controller: Intel Corporation Comet Lake Management Engine Interface
00:1c.0 PCI bridge: Intel Corporation Device 02ba (rev f0)
00:1c.4 PCI bridge: Intel Corporation Comet Lake PCI Express Root Port #5 (rev f0)
00:1d.0 PCI bridge: Intel Corporation Comet Lake PCI Express Root Port #9 (rev f0)
00:1d.4 PCI bridge: Intel Corporation Comet Lake PCI Express Root Port #13 (rev f0)
00:1f.0 ISA bridge: Intel Corporation Comet Lake PCH-LP LPC Premium Controller/eSPI Controller
00:1f.3 Multimedia audio controller: Intel Corporation Comet Lake PCH-LP cAVS
00:1f.4 SMBus: Intel Corporation Comet Lake PCH-LP SMBus Host Controller
00:1f.5 Serial bus controller: Intel Corporation Comet Lake SPI (flash) Controller
01:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader (rev 01)
02:00.0 PCI bridge: Intel Corporation JHL7540 Thunderbolt 3 Bridge [Titan Ridge 2C 2018] (rev 06)
03:00.0 PCI bridge: Intel Corporation JHL7540 Thunderbolt 3 Bridge [Titan Ridge 2C 2018] (rev 06)
03:01.0 PCI bridge: Intel Corporation JHL7540 Thunderbolt 3 Bridge [Titan Ridge 2C 2018] (rev 06)
03:02.0 PCI bridge: Intel Corporation JHL7540 Thunderbolt 3 Bridge [Titan Ridge 2C 2018] (rev 06)
04:00.0 System peripheral: Intel Corporation JHL7540 Thunderbolt 3 NHI [Titan Ridge 2C 2018] (rev 06)
3a:00.0 USB controller: Intel Corporation JHL7540 Thunderbolt 3 USB Controller [Titan Ridge 2C 2018] (rev 06)
3b:00.0 3D controller: NVIDIA Corporation GP108M [GeForce MX250] (rev a1)
3c:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981/PM983
6

being almost totally ignorant in such things:
it appears you DO have sound :man_shrugging:
there is a card 0 …

7

A couple of things: does plugging something in or connecting a Bluetooth device result in any sound?

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8

lspci shows audio device detected

00:1f.3 Multimedia audio controller: Intel Corporation Comet Lake PCH-LP cAVS

aplay shows 3 HDMI output devices but no analog output for speakers/headphone jack

I suggest check audio devices detected in ALSA

sudo alsa-info.sh --upload
9

Ok this is interesting.

First there is nothing in the Bios related to sound.

Second. The bluetooth idea was good. However I can’t get bluetooth to work in LInux on this laptop so I went windows and connected to my alexa echo plus and it played sound from the laptop.

Here is the result of the last command you wanted me to run:

http://alsa-project.org/db/?f=33ea2652767e5bce170af3b84bf55c0f185a9a8b

10

… well: the sound is working then
so it can’t be any missing electrical connection …

11

So could the speakers themselves and I think there are 4 all quit working? Plus windows having the same message of no output or input device?
If the speakers themselves were bad would it generate that message?
Any idea what to try next?

I guess I could get a bluetooth dongle and just use my echo for sound.

12

… but you just said that Windows did play sound …

those two things don’t fit for me

13

not from the laptop speakers.
from the echo

14

Boot from USB next.

1 Like
15

I have several OS’s on usb that I test with and none of them are working either.
Same errors about no output device.
They all have dummy output or something similar.
They have a speaker test and I push it and it acts like it is playing a sound but nothing comes out of the speakers.

16

I have a horrible suspicion that this motherboard supports use of the amplifier when the OS is not running, via an external input. I’m sure I’ve seen examples where the laptop speakers can be used “independently” … possibly the Toshiba NB520 is one. Somewhat akin to the “sleep and charge” feature on many machines, where the USB ports are powered separately (and maybe more directly to the battery).

In this case, the amplifier circuit might not have the same reverse-polarity protection as the rest of the motherboard.

I hope this is not the case but you could have fried the audio amp. — do the USB ports still function OK?

17

This laptop has 3 usb ports. 2 usb-c ports.
They all are working.

18

… working, but not (electrically) connected?
is what that sounds like to me

some little tiny connector … not being connected

19

I’ve had the same thing.

Those ribbon cables are a right pain in the proverbial, sometimes.

Trackpad not working …? Found the connector wasn’t in exactly the right position. I can’t really blame the cat for that, either!

2 Likes
20

When you reverse polarity +/- you will inflict damage.

How much damage is impossible to deduce - it will depend on the quality of the electronics and how/if the vendor has been foreseeing the scenario - in such case a diode has been inserted to protect the circuit if polarity has been inverted.

A decent USB soundcard may be a viable replacement if/when damage has been inflicted.

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