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Chromecast 1 Device Not Displaying Image on Technika TV After Switch from Panasonic TV

Przemo1983rmi 24459 17
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Why does a Chromecast 1 show a black screen with a no-signal message on one TV after being moved from another TV, even though HDMI works with a laptop?

The Chromecast itself is likely fine; the problem is probably the TV’s old software or HDMI compatibility/handshake issue, because it works on other TVs but not on the Technika and only on one HDMI input of the Panasonic [#19003139][#19573551] Try powering the Chromecast from the socket with a different charger/cable instead of the TV, and reset the Chromecast again to be sure it was done correctly [#18627441] Also disconnect the TV from mains for at least a dozen minutes and test again [#18627443] If the TV still shows only the startup message and then “no signal,” the thread’s conclusion is that the TV software is too old or incompatible [#19003139] One reported workaround is to use an HDMI splitter, which bypasses the protection/compatibility issue [#19573551]
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  • #1 18610047
    Przemo1983rmi
    Level 3  
    Posts: 335
    Rate: 43
    Hello.

    I have a Chromecast 1 device.
    The problem is that for some reason it stopped sending the image to my Technika TV. Previously it worked without any problems.
    The problem occurred when I "translated" Chromecast from another TV, with which it worked properly.
    It worked flawlessly on the Panasonic TV, it previously worked on the Technika TV, but now it doesn't work.
    When, for example, I want to upload an image via YouTube, it switches to HDMI, but there is a black screen with a countdown and a message about no signal,
    I checked the HDMI inputs, they work well, connecting via HDMI allows you to display the image from the laptop.
    I have already reset the Chromecast device by holding the button.
    I also restored the TV to factory settings.
    Please help, what could be the problem?
    Can the HDMI ports be damaged despite the image being transmitted from the laptop?
    Let me tell you that I use the Internet on my phone. I use it to create a hotspot.
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  • #2 18610247
    staś pytalski
    Level 41  
    Posts: 7053
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    And if you go back to Panasonic, does it work?
  • #3 18610506
    Przemo1983rmi
    Level 3  
    Posts: 335
    Rate: 43
    Yes, it works on Panasonic. However, I noticed that it works on Panasonic TV only with one HDMI 2 port, on the others it sees no image, HDMI 1 and HDMI 3 without image.
    Is there any possibility that the device was somehow remembered only assigned to this port?
    Maybe I'll try with a different Google account. Because I don't know anymore.
  • #4 18621813
    Przemo1983rmi
    Level 3  
    Posts: 335
    Rate: 43
    Can anyone give me a hint? I'm out of ideas.
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    #5 18622998
    staś pytalski
    Level 41  
    Posts: 7053
    Help: 758
    Rate: 1426
    How many HDMI ports do you have in Technika? What model is it?
  • #6 18623267
    Przemo1983rmi
    Level 3  
    Posts: 335
    Rate: 43
    I have 2 HDMI ports in it, the model is: Chromecast 1 Device Not Displaying Image on Technika TV After Switch from Panasonic TV
  • #7 18625568
    staś pytalski
    Level 41  
    Posts: 7053
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    Rate: 1426
    And when you plug Chromecast into HDMI, what do you see on the TV screen when you select HDMI?
  • #8 18627382
    Przemo1983rmi
    Level 3  
    Posts: 335
    Rate: 43
    black screen with time countdown and no signal message,

    I already wrote this in the first post when asking.
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    #9 18627441
    staś pytalski
    Level 41  
    Posts: 7053
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    Check with another charger/cable, do not take power from the TV, but from the socket. Also, try resetting your Google ChromeCast again to make sure you did it correctly. The problem may also be in the TV software.
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    #10 18627443
    Polon_us
    Level 42  
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    What about disconnecting the TV from the mains for at least a dozen or so minutes?
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  • #11 18627621
    Przemo1983rmi
    Level 3  
    Posts: 335
    Rate: 43
    Thank you very much for your interest.
    In response to supporting questions.
    I turned off the TV many times. I reset chromcast. Many times. After the reset, a message appeared on a black background, Chromecast, at the bottom of the screen, then disappeared and the message "no signal" appeared.

    Added after 5 [minutes]:

    I also changed the power supply to the original charger from the socket, still the same as above.
    I reset the TV to factory settings several times.
    Referring to the comment that the TV software may not be up to date.?
    I don't think this is it, because as I mentioned earlier in my statement. The above-mentioned
    "When I connect Chromcast to Panasonic TV, the same thing happens, i.e. no signal, black screen." Only one HDMI 2 port in this Panasonic works properly.
    What could it be?
  • #12 18647961
    Przemo1983rmi
    Level 3  
    Posts: 335
    Rate: 43
    Does anyone know the answer? Has anyone had a similar problem. ? Let me refresh the topic.
  • #13 18994856
    arcadiuszbr
    Level 12  
    Posts: 29
    Rate: 17
    Hello, did you manage to solve this problem? I have the same problem on my LG plasma. When it starts, it displays system startup, then after switching to a higher resolution it shows no signal at the input. No factory resets helped. It seems to me that with each update it worked worse. Installation and connection work normally on the phone
  • #14 19003139
    Przemo1983rmi
    Level 3  
    Posts: 335
    Rate: 43
    Unfortunately, this problem could not be solved. All I know is that it's the fault of the old software on the TV. It works flawlessly on any other TV.
  • #15 19573551
    Sergi12
    Level 1  
    Posts: 1
    Rate: 2
    The DHCP anti-piracy protocol is to blame, or rather the TV's lack of compatibility with it. The easiest way to get around this problem is to purchase an HDMI splitter. The splitter bypasses this protocol. It worked for me.
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  • #16 19840882
    bilmarek
    Level 1  
    Posts: 1
    what splitter is it and which HDMI should it be connected to (1, 2, 3)?
  • #17 19840896
    staś pytalski
    Level 41  
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    bilmarek wrote:
    what splitter is it and which HDMI should it be connected to (1,2,3)?

    What are you asking about? What is your problem? What equipment do you connect and to what?
    You plug the splitter into a free socket if you don't have enough HDMI ports.
  • #18 21535503
    boskiogier0
    Level 2  
    Posts: 2
    Hello. I have a solution to the black screen in Mozilla Firefox. Through this browser, if you turn on Cyfra or Netflix or whatever, and from your phone give projection or screen sharing etc, then in addition to the sound the picture will also be there. Regards
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Topic summary

✨ A Chromecast 1 device stopped displaying video output on a Technika TV after being moved from a Panasonic TV where it worked properly. The issue manifests as a black screen with a countdown and "no signal" message when selecting the Chromecast HDMI input. HDMI ports on the Technika TV are functional, confirmed by successful laptop connections. The Chromecast was reset multiple times, and the TV was restored to factory settings without resolution. The problem persists across different HDMI ports on both TVs, with the Chromecast only working on one specific HDMI port (HDMI 2) on the Panasonic TV. Power supply was tested using the original charger from a wall socket instead of the TV USB port. The user employs a mobile hotspot for internet. Community suggestions included testing different HDMI cables and chargers, fully powering off the TV, and considering TV software compatibility issues. A later response attributed the problem to the TV's outdated software and incompatibility with the DHCP anti-piracy protocol, recommending the use of an HDMI splitter to bypass this protocol as a workaround. Another workaround mentioned involves using Mozilla Firefox browser with screen casting from a phone to achieve video output with sound. The issue remains unresolved on the Technika TV due to hardware/software limitations, while the Chromecast functions normally on other TVs.
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FAQ

TL;DR: 1 of 3 HDMI ports worked; "only with one HDMI 2 port." If your Chromecast 1 shows black screen/no signal, test all HDMI inputs first, then use the fixes below. [Elektroda, Przemo1983rmi, post #18610506]

Why it matters: This FAQ helps Chromecast 1 owners fix no‑image issues on Technika, Panasonic, LG, and similar older TVs without replacing gear.

Quick Facts

What’s the fastest way to fix a Chromecast 1 black screen/no signal?

Start with power and reset. Use the original wall charger, not the TV’s USB. Hold Chromecast’s button until the LED flashes and the TV shows reset. Re‑set up in Google Home and test again. “Do not take power from the TV, but from the socket.” [Elektroda, staś pytalski, post #18627441]

Why does Chromecast only work on HDMI 2 or a single input?

HDMI inputs can behave differently with handshakes. In one case, only 1 of 3 inputs passed video. Try every HDMI input, then stick with the one that works reliably. Rename it in your TV to remember. This pattern indicates an input‑specific compatibility quirk. [Elektroda, Przemo1983rmi, post #18610506]

I see the Chromecast logo, then the TV says “No signal.” What changed?

That pattern suggests the TV loses sync when Chromecast switches modes. Users noticed video during boot, then loss after a higher‑resolution switch. This often points to a handshake or compatibility problem, not Wi‑Fi. Test another HDMI input and stable power. [Elektroda, arcadiuszbr, post #18994856]

Is outdated TV firmware really blocking Chromecast video?

Yes, that’s a common thread finding. One user reported their Chromecast worked on other TVs, but not the older set. Updating firmware can help, though some brands provide no new updates. If updates fail, use the working HDMI input or an external workaround. [Elektroda, Przemo1983rmi, post #19003139]

Will a powered HDMI splitter help in this situation?

Some users report success. A powered splitter can act as a compatibility layer and stabilize the handshake. One member wrote, “The DHCP anti-piracy protocol is to blame,” and a splitter fixed it for them. If you try this, place it between Chromecast and TV. [Elektroda, Sergi12, post #19573551]

Which HDMI input should I pick if some ports show “No signal”?

Test every HDMI port, then use the one that consistently shows video. In one case, only HDMI 2 worked while HDMI 1 and 3 failed. Label that input and keep Chromecast there. This reduces future setup friction and avoids random dropouts. [Elektroda, Przemo1983rmi, post #18610506]

Can unplugging the TV from mains clear an HDMI handshake problem?

Yes. Fully power‑cycle the TV by unplugging it for 10–15 minutes. This clears the HDMI stack in many sets. After reconnecting power, select the Chromecast input and test again. This quick step costs nothing and often restores the picture. [Elektroda, Polon_us, post #18627443]

Does using a phone hotspot cause the black screen on Chromecast 1?

Unlikely here. Users reported installation and connection work normally, yet video drops after a resolution change. That points to HDMI handshake rather than Wi‑Fi issues. Keep using your hotspot, but focus fixes on inputs, power, and TV firmware. [Elektroda, arcadiuszbr, post #18994856]

Is my Chromecast 1 defective if it fails only on one TV?

Probably not. The same Chromecast worked fine on other TVs in the thread. That suggests the TV’s firmware or HDMI implementation is the blocker. Keep Chromecast on the known‑good input or add a compatibility device if needed. [Elektroda, Przemo1983rmi, post #19003139]

Should I try another charger or USB cable for Chromecast 1?

Yes. Use the original 5V wall charger and a good USB cable. Avoid powering from the TV’s USB port to prevent voltage dips. Replace worn cables and retest. “Do not take power from the TV, but from the socket.” [Elektroda, staś pytalski, post #18627441]

Why does the picture drop exactly when apps start (YouTube, Netflix)?

Apps may trigger higher resolution or stricter content protection once playback begins. Users saw video during startup, then loss when resolution increased. That is consistent with a handshake or compatibility break. Try a different HDMI input or a powered splitter. [Elektroda, arcadiuszbr, post #18994856]

Can Firefox casting or phone screen mirroring restore the picture?

One user reports success by launching playback in Firefox and using phone projection. This workaround restored both sound and picture for them. It does not fix TV firmware limits, but it can get you streaming. Test it if standard fixes fail. [Elektroda, boskiogier0, post #21535503]

Is my Technika’s HDMI port damaged if a laptop works but Chromecast doesn’t?

Port damage is unlikely if a laptop displays fine. The contrast suggests a compatibility or handshake issue specific to Chromecast. Focus on using the working HDMI input, stable power, and TV resets. Consider a powered compatibility device if needed. [Elektroda, Przemo1983rmi, post #18610047]

After a reset, I briefly see “Chromecast,” then it disappears—normal?

It matches reports in the thread. The TV shows the reset screen, then loses signal as the mode changes. That indicates the handshake breaks after boot. Proceed with input testing, stable power, and firmware checks. [Elektroda, Przemo1983rmi, post #18627621]
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