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frozensun

logitech C920 dead

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Posted · Original PosterOP

I purchased logitech C920 HD Pro webcam.

Owner said it has sound but no video.

I thought it's driver problem and I'll fix it cuz he had W7,but no luck even with W10

W10 recognizes the cam but it simply won't show picture.

I'm not inti electronics but I mean to webcam fail is very rare.

So what could be the reason not to work?

I'm not into electronics,but I'm willing to open it and see maybe for damage components though I don't know to test them with multimeter.


 

Please do not take offence for my apparent confusion or rudeness,it's not intent me to be like that,it's just my BPD,be nice to me,and I'll return twice better,be rude and usually I get easly pissed of...I'll try to help anyone here,as long as it's something I dealt with,and even if you think I'm rude or not polite,forgive me,  it's not me it's my BPD.

Thanks for understanding.

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could be loose/broken wire(normally the core of wire)

or a burnt out IC

 

hard to say


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Posted · Original PosterOP
3 minutes ago, Moonzy said:

could be loose/broken wire(normally the core of wire)

or a burnt out IC

 

hard to say

is it repairable?U mean USB cable wire?But then PC wouldn't recognize the cam,right?


 

Please do not take offence for my apparent confusion or rudeness,it's not intent me to be like that,it's just my BPD,be nice to me,and I'll return twice better,be rude and usually I get easly pissed of...I'll try to help anyone here,as long as it's something I dealt with,and even if you think I'm rude or not polite,forgive me,  it's not me it's my BPD.

Thanks for understanding.

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Just now, frozensun said:

is it repairable?

broken wire/core, yea

 

broken IC, probably just buy a new webcam


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I hate Intel's pricing, Ryzen's weird quirks, Nvidia's pricing, and Radeon GPUs in general

 

Spoiler

 

Products I like:

Spoiler

Sony Xperia Z1 / Z2 / 10 ii, Asus Strix 970 / 1070, Samsung SSD, WD HDD, Corsair PSUs (AX, RM, CX(grey)), GeForce GPU, NZXT N450/S340, be quiet! Coolers, G.Skill Trident RAM, Logitech M525, Logitech G440, Razer Deathadder Elite

 

Products I hate:

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Xperia Z3, XiaoMi 5c, Radeon GPUs, Razer Audio Products, any bloatwares

 

Companies I absolutely adore: (and hope it stays that way)

Spoiler

be quiet! - sent me AM4 mounting for my DRP3 even though it's way past the timeframe stated, no questions asked

Corsair - very good RMA experience, absolutely recommend

 

Companies I hate:

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Nvidia, Intel, Apple, TMT (Thundermatch, a retailer)

 

Personal Blacklisted Companies:

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Acer monitors, Gigabyte, Seagate HDD, Kingston SSD, Razer (except their mouse), XiaoMi Phones

 

Remember, just because I had good/bad experiences with these companies/product, doesn't mean you will have similar experiences too. I would still recommend these products if they made sense for your needs, but I'll add a disclaimer of my experience if it's relevant. Feel free to DM me asking why they are where they are.

 

 

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7 minutes ago, Moonzy said:

could be loose/broken wire(normally the core of wire)

or a burnt out IC

It's a USB 2.0 - camera, so there's only 4 wires, ie. +5V, GND, D+ and D-. If any of those wires was broken, it wouldn't work at all, so the issue is something else. Assuming OP doesn't have the tools or the skills to trace the PCB and replace SMD-components, the camera is unrepairable by OP.


Hand, n. A singular instrument worn at the end of the human arm and commonly thrust into somebody’s pocket.

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1 minute ago, WereCatf said:

If any of those wires was broken

im thinking internal ribbon cable/wire

if it's a ribbon cable, it's pretty hard to fix though


Things I need help with: *new* What can Facebook do to me? Privacy Inquiries

Spoiler

 

 

I hate Intel's pricing, Ryzen's weird quirks, Nvidia's pricing, and Radeon GPUs in general

 

Spoiler

 

Products I like:

Spoiler

Sony Xperia Z1 / Z2 / 10 ii, Asus Strix 970 / 1070, Samsung SSD, WD HDD, Corsair PSUs (AX, RM, CX(grey)), GeForce GPU, NZXT N450/S340, be quiet! Coolers, G.Skill Trident RAM, Logitech M525, Logitech G440, Razer Deathadder Elite

 

Products I hate:

Spoiler

Xperia Z3, XiaoMi 5c, Radeon GPUs, Razer Audio Products, any bloatwares

 

Companies I absolutely adore: (and hope it stays that way)

Spoiler

be quiet! - sent me AM4 mounting for my DRP3 even though it's way past the timeframe stated, no questions asked

Corsair - very good RMA experience, absolutely recommend

 

Companies I hate:

Spoiler

Nvidia, Intel, Apple, TMT (Thundermatch, a retailer)

 

Personal Blacklisted Companies:

Spoiler

Acer monitors, Gigabyte, Seagate HDD, Kingston SSD, Razer (except their mouse), XiaoMi Phones

 

Remember, just because I had good/bad experiences with these companies/product, doesn't mean you will have similar experiences too. I would still recommend these products if they made sense for your needs, but I'll add a disclaimer of my experience if it's relevant. Feel free to DM me asking why they are where they are.

 

 

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Just now, Moonzy said:

im thinking internal ribbon cable/wire

There is no such a thing there:

u4BHg5gO5amsX5y3.jpg.c1f5dd107ead911660f1c68434437311.jpg


Hand, n. A singular instrument worn at the end of the human arm and commonly thrust into somebody’s pocket.

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Posted · Original PosterOP

My friends if the cable is the issue any average electrician can fix it...bad IX don't think so,I don't think webcams are prone to failures,I mean those devices don't work 24/7.

I can open the webcam and picture inside,if that would help?

I'm not into electronics,I see there a lot of capacitors,power circuit with 2 coils ans 2 mosfets..

s judging by the PCB what could likely to fail?


 

Please do not take offence for my apparent confusion or rudeness,it's not intent me to be like that,it's just my BPD,be nice to me,and I'll return twice better,be rude and usually I get easly pissed of...I'll try to help anyone here,as long as it's something I dealt with,and even if you think I'm rude or not polite,forgive me,  it's not me it's my BPD.

Thanks for understanding.

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Posted · Original PosterOP
7 minutes ago, Moonzy said:

im thinking internal ribbon cable/wire

if it's a ribbon cable, it's pretty hard to fix though

dude where do you see ribbon cable?


 

Please do not take offence for my apparent confusion or rudeness,it's not intent me to be like that,it's just my BPD,be nice to me,and I'll return twice better,be rude and usually I get easly pissed of...I'll try to help anyone here,as long as it's something I dealt with,and even if you think I'm rude or not polite,forgive me,  it's not me it's my BPD.

Thanks for understanding.

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Posted · Original PosterOP

This dude got lucky,such an issue even I could try to fix it...


 

Please do not take offence for my apparent confusion or rudeness,it's not intent me to be like that,it's just my BPD,be nice to me,and I'll return twice better,be rude and usually I get easly pissed of...I'll try to help anyone here,as long as it's something I dealt with,and even if you think I'm rude or not polite,forgive me,  it's not me it's my BPD.

Thanks for understanding.

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2 hours ago, frozensun said:

My friends if the cable is the issue any average electrician can fix it...bad IX don't think so,I don't think webcams are prone to failures,I mean those devices don't work 24/7.

As @WereCatf said, it's probably not a USB cable issue because the device connects to your computer and initializes, but doesn't return any video correct? If that is the case, then the USB cable is fine. If it was damaged, you wouldn't have gotten that far. 

2 hours ago, frozensun said:

I can open the webcam and picture inside,if that would help?

Maybe, but look at the picture of that board. Imagine U7 is broken on it, for example. Assuming there's no obvious burn marks or corrosion, do you have the know-how and time to diagnose the true issue? If you do, I have a feeling it is well worth your time to not deal with this and buy a new camera. If not, I don't know what anyone on the internet can tell you beyond what you already know: shit's fucked.

2 hours ago, frozensun said:

I'm not into electronics,I see there a lot of capacitors,power circuit with 2 coils ans 2 mosfets..

Yeah this is a complicated board. I see impedance matched differential pairs, and I'm sure there's a mess of microcontrollers and other circuitry on the other side that we can't see from the picture posted above. 

2 hours ago, frozensun said:

s judging by the PCB what could likely to fail?

That is impossible to say without the device in one's hands and without the proper tools. You have an interesting, half failed case where the camera still "works" it's just not working 100%. The problem could be with any one of those components on the board. I wouldn't say there's any one component that is most likely to fail besides the cable (which has been ruled out), and we don't know if any of the components are closer to their rated maximum loads in this design (doubtful, but a possibility). If you want me to guess, I would start buy checking all of the power lines to and from the sensor, but that's assuming they're accessible on this board which does not appear to be the case. I'm sorry if this came off calloused, but there's no list of common failure modes for devices like this. I'm not discouraging you from opening it up and having a go at fixing it, but I think it's important to manage your expectations and realistically analyze your skills and knowledge before tackling a complicated device such as this. 


ASU

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I can't imagine 4 SOT23-5 voltage regulators doing much talking over USB, so the party pieces of this camera are on the unseen backside of the PCB.

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1 hour ago, Unimportant said:

I can't imagine 4 SOT23-5 voltage regulators doing much talking over USB, so the party pieces of this camera are on the unseen backside of the PCB.

Unlikely to matter, though. I'd be very much surprised if the issue was something that was actually visible with a naked eye; it's far more probable that one would need to get a multimeter out to find the issue, and OP doesn't have the skills for that, so...


Hand, n. A singular instrument worn at the end of the human arm and commonly thrust into somebody’s pocket.

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53 minutes ago, WereCatf said:

Unlikely to matter, though. I'd be very much surprised if the issue was something that was actually visible with a naked eye; it's far more probable that one would need to get a multimeter out to find the issue, and OP doesn't have the skills for that, so...

Just pointing out the futility of people standing at the back of the car pointing and discussing why it won't run while the engine is in the front.

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Posted · Original PosterOP

Come on guys,webcam is device which is used like maybe 30 min to 2 h max per day....those devices are not really pron to fail,and this is not 20 year old cam,it's newer model...so must be smth particular that killed the webcam...

I could take it to local electrician but hmm I don't think even with his skills he can repair ir because I suppose replacement parts are hard to find....


 

Please do not take offence for my apparent confusion or rudeness,it's not intent me to be like that,it's just my BPD,be nice to me,and I'll return twice better,be rude and usually I get easly pissed of...I'll try to help anyone here,as long as it's something I dealt with,and even if you think I'm rude or not polite,forgive me,  it's not me it's my BPD.

Thanks for understanding.

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2 hours ago, frozensun said:

Come on guys,webcam is device which is used like maybe 30 min to 2 h max per day....those devices are not really pron to fail,and this is not 20 year old cam,it's newer model...so must be smth particular that killed the webcam...

I could take it to local electrician but hmm I don't think even with his skills he can repair ir because I suppose replacement parts are hard to find....

Well, it clearly did die, and both you and the previous owner were aware of this. The cause could be anything ranging from heat damage to water damage to static electricity damage.

 

Any number of components could have been damaged in the above mentioned possibilities and so it is impossible to gauge anything without at least very detailed pictures of a teardown of your parituclar webcam. Even with the teardown in the absence of obvious damage (salt crystals, water marks, burnt components) nothing can be done without some serious probing which you mentioned you are not skilled enough to do.

 

And even after all of that you should question whether the time and potential money is worth spending on this sub 100 euro webcam.

 

I think the situation here is clear, if you wanted to get a working webcam, you should have bought a working webcam. If you wanted to just take a risky bargain, you took the wrong risk. If you wanted a DIY repair project, you should actually put some effort into it instead of being so reliant on input from here without even having the present your own teardown.

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