[PROBLEM] Playback problem since update to Leia

[Don Pedro]

(10th May, 2020 11:34 PM)gkusiak Wrote:  Nope, You don’t. Unless it’s disposable. In my case it was hedging: if my non-smart plasma display dies, it would be difficult to replace with a non-smart tv, so I might as well have a useful SBC on hand for something if the 4k smart tv’s media Center is sufficient; if not I can keep the xbian build.

What is currently really driving me nuts is the fact that the raspi 4 is also not delivering a picture on my TV (it's a non 4k TV)! What happened/what I did so far:
- The raspi 3 I used so far suddenly and unexpectedly stopped delivering a picture via HDMI (without changing anything on the raspi and TV).
- It was however able to deliver a picture via HDMI by clamping the video output to HDMI (via hdmi-drive=2 hdmi_group=x and hdmi_mode=y in config.txt, see https://www.raspberrypi.org/documentation/configuration/config-txt/video.md).
- For a short time(!) this worked but got broken soon, too, it was like the raspi 3 didn't have a HDMI output anymore (at least the software didn't see it anymore, "/opt/vc/bin/tvservice -m DMT" and "/opt/vc/bin/tvservice -m CEA" gave an error instead of valid information)

- After the picture broke down completely I tried:
- Changing the HDMI cable, no change in behavior
- Changing the HDMI input of the TV, no change in behavior
- Change the power supply of the raspi, no change in behavior (one of the power supplies was a laboratory power supply with a linear circuit and able to deliver up to 5 Amps, so it is not the power supply)
- Attach a PC-monitor to the raspi, also no picture
-> I was apparent for me that the HDMI output of the raspi 3 has died.

So I bought a raspi 4, together with an official power supply and a new HDMI cable. And it doesn't deliver a picture on any of the two HDMI outputs and this is where I'm really frustrated. Is it that my TV is killing all the HDMI?

What I will do next:
- Attach an old video player to the TV. If this is also not giving a HDMI picture this is a strong hint that either all(!) HDMI inputs of my TV have died (I can't really believe that, the TV has three HDMI inputs), or that the TV is killing the HDMI.
- Attach the old video player to the PC-monitor before and after attaching it to the TV.
- As a test against a software problem install the current rasbian distribution and check if this is yielding a HDMI picture.