Hardware Switch with no TV Output

[BaamAlex]

Hello guys. A friend of mine sent me his switch (its an unpatched erista). The console works. But it has no TV output. My TV switches to the console, but after a few seconds, my TV says no video. My guess is, it isn't the usb c charging port. What could be the issue here?

 

[Deleted member 301661]

• How do you connect it to the tv?
• By the original dock?
• What TV do you use?
• Is the TV accepting low resolution input?
• Do you use an upscaler?
• Why do you rule out the charger?

 

[jkyoho]

any failure of these would stop dock working.

 

[Purple_Shyguy]

Wasn't there some old thing where sole TVs didn't recognise the system until you set the TV resolution scale to 99% if it didn't work? I remember my TV wouldn't recognise switch until I scaled it to 99% or something

 

[BaamAlex]

How do you connect it to the tv?

Via the dock? I dunno how to answer this question otherwise.

By the original dock?

Yes.

What TV do you use?

It's an old Samsung TV (don't ask me for the model)

Is the TV accepting low resolution input?

I dunno. Do you mean for example 480p and so on? If yes, then yes.

Do you use an upscaler?

No.

Why do you rule out the charger?

It is just my assumption. Because the screen of the console itself turns black (exactly like when it is docked) and the TV switches to the consoles output. Means, there must be some sort of data signal be sent to the TV. I mean, I could swap out the old USB c port if that is the real issue here. But the port looks clean for me (not damaged, no bent pins or smth like this).

 

[Deleted member 301661]

Via the dock? I dunno how to answer this question otherwise.


Yes.


It's an old Samsung TV (don't ask me for the model)


I dunno. Do you mean for example 480p and so on? If yes, then yes.


No.


It is just my assumption. Because the screen of the console itself turns black (exactly like when it is docked) and the TV switches to the consoles output. Means, there must be some sort of data signal be sent to the TV. I mean, I could swap out the old USB c port if that is the real issue here. But the port looks clean for me (not damaged, no bent pins or smth like this).

the switch detects power consumtion over usb-c that doesn't mean it got connection over to the external GPU in the dock so it's not ruled out, try another dock (notebook dock should work as long as it's got usb- power delivery pushthrough) and another tv to be sure it's the switch that fails

 

[BaamAlex]

try another dock

We did already. My friend tried it with his own dock and I tried it with mine. No video signal on both.

 

[randy_w]

Does the green light on dock turn on when you plug in the console?

Also try to change TV output in settings to 480p/720p instead of automatic, ran into an issue with someone connecting the switch to a DVI monitor through an HDMI switch, for some reason it can't display 1080p signal correctly and will just show a black screen.

If it doesn't work on a known good dock, could be a bad usb port, bad hdmi filter or even a bad pi3usb chip. Start by cleaning the usb port, see if there's any dirt or debris in the usb port or if any pin's damaged. Clean contacts by spraying a little bit of contact cleaner, then plug/unplug a usb c cable a few times, see if it works.

 

[thesjaakspoiler]

Try another TV first.
Sometimes it is some video out setting that is not compatible with the TV.
HDMI can do many things but not everything is supported by all TVs.

The video signal is send over the USB port datalines to the hub where it gets converted to a HDMI signal
Maybe check if your switch connects over USB.
Atmosphere added a homebrew app called Haze.
If you run that, our switch should show up as a usb stick on a PC without the need for any drives or so.
If that does not work, then you need to inspect the USB connector.
Sometimes some of the data pins have disconnected from the main board.
Also check for missing/bent pins on the outside.

The other thing that comes to my mind is a broken pi3usb chip.
This is the chip that converts the video signal so that it can be send over USB.
Afaik, the USB signal goes through some filters first and usually those are the ones to fail with something like a power surge over the datalines.
But it could be that this chip somehow broke.

 

[BaamAlex]

Maybe check if your switch connects over USB.

I tried it. My pc detects the console and i can send a payload without any problems. So...it can't theoretically the usb c port, right? Or am i wrong?