# Random Black screen no errors 1.7.8

**URL:** <https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085>\
**Category:** Web\
**Created:** [May 26, 2020, 11:46am UTC](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085 "2020-05-26T11:46:50Z")\
**Posts on this page:** 20\
**Page:** 1

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**Author:** ![subscriptions1](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/subscriptions1/32/9227_2.png) [@subscriptions1](https://devforum.zoom.us/u/subscriptions1)\
**Post date:** [May 26, 2020, 11:46am UTC](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085/1 "2020-05-26T11:46:50Z")

</div>

**Description**  
Random black screen upon joining webinar and nothing is displayed

**Error**  
No errors are logged:  
— initMeeting —  
zoom-meeting-1.7.8.min.js:2 {debug: true, leaveUrl: “[https://demo.arkage.it/creative-portal/zoom.html](https://demo.arkage.it/creative-portal/zoom.html)”, showMeetingHeader: true, disableInvite: false, disableCallOut: false, …}  
zoom-meeting-1.7.8.min.js:2 — joinMeeting —  
zoom-meeting-1.7.8.min.js:2 {meetingNumber: “\*\*\*\*\*\*\*\*\*\*\*”, userName: “dsadsadsdas”, userEmail: “temp@arkage.it”, passWord: “”, dialogMN: “938 9861 9209”, …}  
zoom-meeting-1.7.8.min.js:2 \>\>\>\>\>\>\>\> CREATE JSMEDIASKD INSTANCE \<\<\<\<\<\<\<\<  
zoom-meeting-1.7.8.min.js:2 \>\>\>\>\>\>\>\>INIT JSMEDIASDK\<\<\<\<\<\<\<\<  
zoom.js:88 {method: “join”, status: true, errorCode: 0, errorMessage: null, result: null}

**Which version?**  
SKD.1.7.8  
…  
console.log(‘checkSystemRequirements’);  
console.log(JSON.stringify(ZoomMtg.checkSystemRequirements()));

```
    // it's option if you want to change the WebSDK dependency link resources.
     ZoomMtg.setZoomJSLib('https://source.zoom.us/1.7.8/lib', '/av'); // CDN version default
    // ZoomMtg.setZoomJSLib('https://jssdk.zoomus.cn/1.7.8/lib', '/av'); // china cdn option 
    // ZoomMtg.setZoomJSLib('http://localhost:9999/node_modules/@zoomus/websdk/dist/lib', '/av'); // Local version default

    ZoomMtg.preLoadWasm();

    ZoomMtg.prepareJssdk();
...

```

**To Reproduce(If applicable)**  
Steps to reproduce the behavior:

1. Go to [https://demo.arkage.it/creative-portal/zoom.html](https://demo.arkage.it/creative-portal/zoom.html)
2. Click on “LISTA WEBINAR FIGHISSIMI PORCO ZIO”
3. Select “Fini \<\> Sara”
4. See black screen

**Screenshots**  
n/A

**Smartphone (please complete the following information):**  
ios and chrome and safari mac

**Additional context**  
Update: AUDIO STREAM IS WORKING PROPERLY only cam is not working.

\*This post has been edited to remove any meeting / webinar IDs

---

<div class="post-metadata">

**Author:** ![subscriptions1](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/subscriptions1/32/9227_2.png) [@subscriptions1](https://devforum.zoom.us/u/subscriptions1)\
**Post date:** [May 26, 2020, 12:04pm UTC](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085/2 "2020-05-26T12:04:35Z")

</div>

you can have video back to work ONKLY sharing screen and then reverting to camera…

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<div class="post-metadata">

**Author:** ![mchrenko](https://avatars.discourse-cdn.com/v4/letter/m/96bed5/32.png) [@mchrenko](https://devforum.zoom.us/u/mchrenko)\
**Post date:** [May 27, 2020, 1:32pm UTC](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085/3 "2020-05-27T13:32:06Z")

</div>

we are facing similar issues, lot of black screen instead of video is happening on 1.7.8  
reverting to 1.7.7 with no safari / firefox support (??)  
as reported, when turned on / off screenshare, video will start work normally

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**Author:** ![flippyhead](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/flippyhead/32/3578_2.png) [@flippyhead](https://devforum.zoom.us/u/flippyhead)\
**Post date:** [May 27, 2020, 3:25pm UTC](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085/4 "2020-05-27T15:25:27Z")

</div>

Glad (and sad!) to see others experiencing it as well. We don’t know of any particulars that cause this, it seems to be a small number of users who get stuck in this state.

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<div class="post-metadata">

**Author:** ![subscriptions1](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/subscriptions1/32/9227_2.png) [@subscriptions1](https://devforum.zoom.us/u/subscriptions1)\
**Post date:** [May 27, 2020, 3:36pm UTC](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085/5 "2020-05-27T15:36:59Z")

</div>

consider we have swapped to OBS and Twitch.  
don’t think we ever consider getting back to zoom anymore.

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**Author:** ![SamHarper](https://avatars.discourse-cdn.com/v4/letter/s/b9e5f3/32.png) [@SamHarper](https://devforum.zoom.us/u/SamHarper)\
**Post date:** [May 28, 2020, 2:01pm UTC](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085/6 "2020-05-28T14:01:28Z")

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We have the same error here. Multiple testers, browsers, ios, etc. Once the presenter turns on screenshare and back, the video works, but not before. Any fixes?

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**Author:** ![tommy](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/tommy/32/72769_2.png) [@tommy](https://devforum.zoom.us/u/tommy)\
**Post date:** [June 3, 2020, 5:07pm UTC](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085/7 "2020-06-03T17:07:38Z")

</div>

Hey @SamHarper, @flippyhead, @mchrenko, @subscriptions1,

Apologies you are experiencing this issue. Our engineers are investigating. (CS-1906)

If you could please share screenshots of the issue, that will help.

Thanks,  
Tommy

---

<div class="post-metadata">

**Author:** ![altosdelonco2020](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/altosdelonco2020/32/9798_2.png) [@altosdelonco2020](https://devforum.zoom.us/u/altosdelonco2020)\
**Post date:** [June 4, 2020, 4:23pm UTC](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085/8 "2020-06-04T16:23:42Z")

</div>

here is mine

 ![image](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/2X/9/99fd45662870aacd52c9fb48bb01676bb79987a2.png)

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<div class="post-metadata">

**Author:** ![bkirk](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/bkirk/32/8193_2.png) [@bkirk](https://devforum.zoom.us/u/bkirk)\
**Post date:** [June 4, 2020, 5:07pm UTC](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085/9 "2020-06-04T17:07:59Z")

</div>

![bug_yesaudio-novideo](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/2X/c/c4ccc492dcb84aa022c045ea6ffec2c79e626f6e.png) Here is one of ours. (I’m the PM not Dev btw)

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<div class="post-metadata">

**Author:** ![eperture.dev](https://avatars.discourse-cdn.com/v4/letter/e/ecd19e/32.png) [@eperture.dev](https://devforum.zoom.us/u/eperture.dev)\
**Post date:** [June 4, 2020, 7:18pm UTC](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085/10 "2020-06-04T19:18:55Z")

</div>

We intermittently have black screen/no video for the host. We are using Web SDK version 1.7.7. The problem is intermittent and didn’t begin until 5/30. Audio works consistently, but video only works intermittently.

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<div class="post-metadata">

**Author:** ![sales1](https://avatars.discourse-cdn.com/v4/letter/s/ed655f/32.png) [@sales1](https://devforum.zoom.us/u/sales1)\
**Post date:** [June 4, 2020, 7:56pm UTC](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085/11 "2020-06-04T19:56:16Z")

</div>

Also getting a black screen, only for the host though. This happens consistently for us in chrome. Downgrading to 1.7.7 from 1.7.8 resolved the issue.

Does not appear to be an issue in FireFox.

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<div class="post-metadata">

**Author:** ![tommy](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/tommy/32/72769_2.png) [@tommy](https://devforum.zoom.us/u/tommy)\
**Post date:** [June 9, 2020, 5:10pm UTC](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085/12 "2020-06-09T17:10:45Z")

</div>

Thanks for the details @sales1, @eperture.dev, @bkirk, @altosdelonco2020,

Our Web SKD engineering team is investigating the issue.

Does this happen only when the host screenshares?

-Tommy

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<div class="post-metadata">

**Author:** ![sales1](https://avatars.discourse-cdn.com/v4/letter/s/ed655f/32.png) [@sales1](https://devforum.zoom.us/u/sales1)\
**Post date:** [June 9, 2020, 5:26pm UTC](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085/13 "2020-06-09T17:26:11Z")

</div>

> [@tommy](#):
>
> Does this happen only when the host screenshares?

It’s happening to the host video whenever they turn their camera on for us, and it’s every meeting, not just some of them.

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<div class="post-metadata">

**Author:** ![qun](https://avatars.discourse-cdn.com/v4/letter/q/f1d935/32.png) [@qun](https://devforum.zoom.us/u/qun)\
**Post date:** [June 9, 2020, 6:00pm UTC](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085/14 "2020-06-09T18:00:09Z")

</div>

Seeming the same issue too. The attendee can see videos without any issues, but the host cannot see the attendee’s video until the attendee shares his / her screen and then stops sharing.

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<div class="post-metadata">

**Author:** ![bkirk](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/bkirk/32/8193_2.png) [@bkirk](https://devforum.zoom.us/u/bkirk)\
**Post date:** [June 9, 2020, 6:00pm UTC](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085/15 "2020-06-09T18:00:33Z")

</div>

No, in fact we’ve found that when the host shares their screen, it can help clear it up. We haven’t tested that exhaustively, but in our limited testing, screen share clears the video issue up.

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**Author:** ![tommy](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/tommy/32/72769_2.png) [@tommy](https://devforum.zoom.us/u/tommy)\
**Post date:** [June 10, 2020, 4:33pm UTC](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085/16 "2020-06-10T16:33:35Z")

</div>

Hey @sales1, @qun, @bkirk,

Appreciate the additional details.

Please confirm that you are loading the WASM files before starting / joining the meeting. If they are not loaded completely first via the `ZoomMtg.preLoadWasm();` and `ZoomMtg.prepareJssdk()`; functions, you will see a black screen.

Thanks,  
Tommy

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<div class="post-metadata">

**Author:** ![sales1](https://avatars.discourse-cdn.com/v4/letter/s/ed655f/32.png) [@sales1](https://devforum.zoom.us/u/sales1)\
**Post date:** [June 10, 2020, 5:04pm UTC](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085/17 "2020-06-10T17:04:35Z")

</div>

We have this included before calling any Zoom SDK functions.

```
        // For CDN version default
        ZoomMtg.setZoomJSLib('https://dmogdx0jrul3u.cloudfront.net/' + zoomVersion + '/lib', '/av');

        // This has to be done
        ZoomMtg.preLoadWasm();
        ZoomMtg.prepareJssdk();
```

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<div class="post-metadata">

**Author:** ![qun](https://avatars.discourse-cdn.com/v4/letter/q/f1d935/32.png) [@qun](https://devforum.zoom.us/u/qun)\
**Post date:** [June 10, 2020, 5:45pm UTC](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085/18 "2020-06-10T17:45:50Z")

</div>

Hi @tommy we were already doing that too:

```
ZoomMtg.setZoomJSLib('https://dmogdx0jrul3u.cloudfront.net/1.7.8/lib', '/av');
ZoomMtg.preLoadWasm();
ZoomMtg.prepareJssdk();
ZoomMtg.showJoinAudioFunction({
      show: false,
});
```

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<div class="post-metadata">

**Author:** ![developer-whova](https://avatars.discourse-cdn.com/v4/letter/d/43a26b/32.png) [@developer-whova](https://devforum.zoom.us/u/developer-whova)\
**Post date:** [June 11, 2020, 3:30pm UTC](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085/19 "2020-06-11T15:30:29Z")

</div>

confirmed bug here, host need to share screen to show the video.

SMH, fixed 1 bug and another appears, can we get this patched like the echo cancellation?

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<div class="post-metadata">

**Author:** ![vijayk.kannan](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/vijayk.kannan/32/1550_2.png) [@vijayk.kannan](https://devforum.zoom.us/u/vijayk.kannan)\
**Post date:** [June 12, 2020, 11:50am UTC](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085/20 "2020-06-12T11:50:21Z")

</div>

We tried all the possible options to solve black screen issues without any success.

[https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085](https://sgndr.online/click?redirect=https%3A%2F%2Fdevforum.zoom.us%2Ft%2Frandom-black-screen-no-errors-1-7-8%2F19085&dID=1591951956341&linkName=https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085)

[https://devforum.zoom.us/t/meeting-bad-audio-and-bad-video/16359/9](https://sgndr.online/click?redirect=https%3A%2F%2Fdevforum.zoom.us%2Ft%2Fmeeting-bad-audio-and-bad-video%2F16359%2F9&dID=1591951956341&linkName=https://devforum.zoom.us/t/meeting-bad-audio-and-bad-video/16359/9)

Everyday we face angry customers yelling at us and laughing at us due this issue , please see the attached video we have screen recorded for your reference , please help us ?  
Given below links are screen records we have done to show the issue

[https://drive.google.com/file/d/1l-zIT2-5RSVfyAbaT9F1yf0glcQ051Md/view?usp=sharing](https://drive.google.com/file/d/1l-zIT2-5RSVfyAbaT9F1yf0glcQ051Md/view?usp=sharing), [https://drive.google.com/file/d/1rq4hHiBq\_5sVEXBIsMPrs0yvxZ5jCdbI/view?usp=sharing](https://drive.google.com/file/d/1rq4hHiBq_5sVEXBIsMPrs0yvxZ5jCdbI/view?usp=sharing), [https://drive.google.com/file/d/1wM4WqGIFNYXKfB4hoB1j1p8cDEUYshSM/view?usp=sharing](https://drive.google.com/file/d/1wM4WqGIFNYXKfB4hoB1j1p8cDEUYshSM/view?usp=sharing)

Meeting url which we used to screen record.

as [https://provider.ortholive.com/meeting/6YIb1Nvt6ky0QVE8Qj9Yz0ykukTvsj](https://sgndr.online/click?redirect=https%3A%2F%2Fprovider.ortholive.com%2Fmeeting%2F6YIb1Nvt6ky0QVE8Qj9Yz0ykukTvsj&dID=1591951956341&linkName=https://provider.ortholive.com/meeting/6YIb1Nvt6ky0QVE8Qj9Yz0ykukTvsj);

We are not able downgrade to 1.7.7 also , on 1.7.7 there was audio issue and video is getting freeze

Every release puts us into lot of pressure and anxiety due to unstable and not usable product for what we pay

[Next page](https://devforum.zoom.us/t/random-black-screen-no-errors-1-7-8/19085.md?page=2)