[Q] Setup issue. Black home screen

santi.marro · Feb 21, 2014

I've just bought a Chromecast device and I'm trying to
setup it. The problem is that when I plug it to the tv, a message appears
saying "Starting chromecast" and then the Chrome logo. After that, black
screen. Nothing appears. The setup program in my pc can find the device but
I can't see anything on the TV.

My TV model is LG 32LE5500

I tried rebooting the TV by unplugging everything and nothing changed.
Also I tried the Chromecast devide in another TV and it worked there, but it's not my TV and I need it to work in the LG one.

I've tried all hdmi ports and it's the same in all of them. The chrome logo and then black.

The last thing I did is to configure the device from the other TV and then plug it on the TV that doesn't work. I realized that the audio does work, I launched the YouTube app from my cellphone and I could hear the video, but again, black screen.

Could it be that my TV has a resolution of 1900x1080 and not 1920x1080?

Please I will appreaciate any kind of help, I really wanted to use the device and it's useless for me right now

EarlyMon · Feb 21, 2014

According to LG, that's a normal 1080p screen.

http://www.lg.com/levant_en/tvs/lg-32LE5500-led/technical-specifications

More likely there's a router setup issue. This may help as a starting point -

https://support.google.com/chromecast/table/3477832?hl=en

bhiga · Feb 21, 2014

santi.marro said:
I've just bought a Chromecast device and I'm trying to
setup it. The problem is that when I plug it to the tv, a message appears
saying "Starting chromecast" and then the Chrome logo. After that, black
screen. Nothing appears. The setup program in my pc can find the device but
I can't see anything on the TV.
...
Could it be that my TV has a resolution of 1900x1080 and not 1920x1080?

Your TV is 1080p, so it's 1920 horizontal.

IIRC the boot logo sends 480p, then Chromecast negotiates with the TV as to what resolutions are supported.
Your TV might not be playing nice in the negotiation process.

So, try booting Chromecast without it connected to the TV.

Disconnect power from Chromecast
Disconnect Chromecast from TV
Reapply power to Chromecast
Wait for it to boot (wait until LED goes solid steady white)
Turn on TV if it is not already on
Set TV to Chromecast input
Plug Chromecast into TV input

santi.marro · Feb 21, 2014

bhiga said:
Your TV is 1080p, so it's 1920 horizontal.

IIRC the boot logo sends 480p, then Chromecast negotiates with the TV as to what resolutions are supported.
Your TV might not be playing nice in the negotiation process.

So, try booting Chromecast without it connected to the TV.

Disconnect power from Chromecast

Disconnect Chromecast from TV

Reapply power to Chromecast

Wait for it to boot (wait until LED goes solid steady white)

Turn on TV if it is not already on

Set TV to Chromecast input

Plug Chromecast into TV input

I tried it and it's the same, a black screen. It works with a monitor that I have and another TV, but, sadly, I need it to work in the LG TV

EarlyMon said:
According to LG, that's a normal 1080p screen.

More likely there's a router setup issue. This may help as a starting point -

The chromecast device works, I checked it and configured it in another TV, but I need it to work in the LG one.

bhiga · Feb 21, 2014

santi.marro said:
I tried it and it's the same, a black screen. It works with a monitor that I have and another TV, but, sadly, I need it to work in the LG TV

Very strange. Almost sounds like an HDCP handshake problem.

Try the HDMI extender in case it's just not plugging in quite right.

Other than that, you can try disabling HDMI CEC (LG calls it SimpLink) and see if that makes a difference.

Do you know what firmware build it has? (Chromecast app will tell you)

santi.marro · Feb 21, 2014

bhiga said:
Very strange. Almost sounds like an HDCP handshake problem.

Try the HDMI extender in case it's just not plugging in quite right.

Other than that, you can try disabling HDMI CEC (LG calls it SimpLink) and see if that makes a difference.

Do you know what firmware build it has? (Chromecast app will tell you)

I've just tried the device with the extender and SimpLink deactivated and it's the same again

Here I leave a screenshot of the Chromecast app attached

bhiga · Feb 21, 2014

santi.marro said:
I've just tried the device with the extender and SimpLink deactivated and it's the same again

Here I leave a screenshot of the Chromecast app attached

Nice names.

Well, you're on the latest firmware build (15250) so either Google broke something in the newest update, or your TV is finicky.

Since your TV is Smart, it might have a firmware update available.

Wait... The specs say "TruMotion 100Hz" - is your TV PAL? It might not support NTSC input...

EarlyMon · Feb 21, 2014

bhiga said:
Nice names.

Well, you're on the latest firmware build (15250) so either Google broke something in the newest update, or your TV is finicky.

Since your TV is Smart, it might have a firmware update available.

Wait... The specs say "TruMotion 100Hz" - is your TV PAL? It might not support NTSC input...

HDMI doesn't care about PAL vs NTSC frequencies by design, exactly why so many in the UK were able to adopt early last year.

bhiga · Feb 21, 2014

EarlyMon said:
HDMI doesn't care about PAL vs NTSC frequencies by design, exactly why so many in the UK were able to adopt early last year.

While I agree that it shouldn't matter in this day and age, they still exist separately in the EDID data because of the differing pixel clocks.

It's possible (though ill-advised) for a modern display to reject an input signal based on it being 50/100 Hz or 60/120 Hz.
I deal with a lot of AV stuff and have run into this issue from time to time.

EarlyMon · Feb 22, 2014

Well, TIL then.

bhiga · Feb 22, 2014

EarlyMon said:
Well, TIL then.

I'm learning every day... sometimes the hard way.

Traditionally European TV sets have been more forgiving than their US counterparts, accepting NTSC "nudged" into PAL-60 or NTSC 4.43 in the analog realm.

While the transition to HD did unify the display resolutions and pixel aspect ratios (everything's square, yay!), the differences in refresh/sampling rates remained.

One day my friend, one day... everything will be 600 Hz or better so 24, 25, 30, 50 and 60 fps content will all be supported and play without judder or needing interpolation. :cyclops:

So back to the topic at hand, it's possible the OP's TV doesn't know what to do with a 30/60 Hz input from Chromecast, though that would be quite silly of LG to impose such a restriction. Still, silly happens more often than you think for all kinds of reasons (gray market sales due to varying exchange rates and import/export laws often is a concern, as we burden on regional support that got no revenue from the foreign sale).
TBH, I don't know for certain whether Chromecast is capable of 25/50 Hz output, it might be. But being that Google isn't selling it outside of US/Canada yet, I doubt they've tested it.

>> Anybody in Europe, can you confirm me whether Chromecast outputs 720/50p, 1080/50i or 1080/50p to your TV? <<

kDnZP · Feb 22, 2014

Sent from my Nexus 10 using xda app-developers app

santi.marro · Feb 22, 2014

Thank you for all your replies,

For what I know, my TV accept NTSC but I'm not 100% sure. I am from South America by the way, in theory electronics here are NTSC.

kDnZP said:
Sent from my Nexus 10 using xda app-developers app

That TV in the picture you posted is very similar to the one I have. Did you have any problem using the chromecast device?

EarlyMon · Feb 22, 2014

The link I gave was from the Eastern Mediterranean, I was more curious about verifying your resolution at the time. There's a 60/120 Hz (NTSC) version of your set, same model number, popular in several South American countries.

I apologize for adding the confusion.

kDnZP · Feb 22, 2014

santi.marro said:
That TV in the picture you posted is very similar to the one I have. Did you have any problem using the chromecast device?

I have not any problem with LG 26LE3300 (1366x768 native resolution).

bhiga · Feb 22, 2014

santi.marro said:
Thank you for all your replies,

For what I know, my TV accept NTSC but I'm not 100% sure. I am from South America by the way, in theory electronics here are NTSC.

That TV in the picture you posted is very similar to the one I have. Did you have any problem using the chromecast device?

Hmm, should work.

Worst-case, since you have other displays that Chromecast does display properly on, you could try this: (it worked on 13300, haven't had need or opportunity to try it on 14975 or 15250)

Locate working monitor and LG TV in close proximity
Connect Chromecast to working monitor and wall power
Once Chromecast is booted, unplug Chromecast from monitor only
Plug Chromecast into LG TV

Likely this will not survive a Chromecast reboot though...

AustinMartin · Feb 25, 2014

I've got a Sanyo DP50740, and my Chromecast is now showing this same behavior. It used to work fine, but I think that the update to firmware 15250 broke something with hdcp in some TV's.

I filed a bug with Google, but the end result was that the google helpdesk can't tell what was updated in the latest build.

I suggest you file a similar bug with Google, so that they see that this is happening with multple TV models.

Until they fix this I'm stuck with a paperweight.

bhiga · Feb 25, 2014

AustinMartin said:
Until they fix this I'm stuck with a paperweight.

It won't sync up even if you hot-plug Chromecast HDMI after it's already booted?

AustinMartin · Feb 26, 2014

bhiga said:
It won't sync up even if you hot-plug Chromecast HDMI after it's already booted?

Nope, tried that. The only thing I haven't tried is to boot up plugged into another device then plug in. Don't have any portable monitors with hdmi input. It might be that they fixed this glitch in the latest firmware.

This is the annoyance of allowing google to update firmware at will. They can break your device, and there's then nothing you can do except wait for the next release. That's why I encourage the original poster to file a bug with them. That's their only window into what's happening.

bhiga · Feb 26, 2014

AustinMartin said:
Nope, tried that. The only thing I haven't tried is to boot up plugged into another device then plug in.
...
They can break your device, and there's then nothing you can do except wait for the next release. That's why I encourage the original poster to file a bug with them. That's their only window into what's happening.

The no HDMI and different HDMI scenarios should be different, they have been in my case at least, but understand not having a practical means to try.

Agree. That's the danger of forced updates.

Sent from a device with no keyboard. Please forgive typos, they may not be my own.

[Q] Setup issue. Black home screen

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