VladyCu
Posts: 12
Joined: Thu Aug 13, 2020 9:39 pm

No HDMI image, tried every solution out there :(

Fri Apr 16, 2021 9:21 pm

Hello!
As I said in the title, I can't get any image out of my Raspberry Pi 4 (4GB).
The only way to see something is if I start it without an SD card. Then it shows me some messages on a red backgroud. Image is bad, like flikering some black artefacts.
As soon as I put in the SD card and it boots, display just keeps Entering Power Save mode, than turns off, then again Power save and so on forever.

I tried every solution for config.txt, I tried removing it, nothing works. I have an QHD Dell monitor with HDMI input, using the original Raspberry HDMI cable. Also tried on my Philips 55" TV, it tells me I have no signal on that cable.
I have a 3A power supply, also tried with the one from my Samsung Phone (2A), exactly the same thing.

This is really frustrating, I can't understand what is going wrong. I have the device since 2019 and always used headless because of this :(

drgeoff
Posts: 11838
Joined: Wed Jan 25, 2012 6:39 pm

Re: No HDMI image, tried every solution out there :(

Fri Apr 16, 2021 9:57 pm

Is this the same RPI4B you were using last August? If yes, was the HDMI output OK then? viewtopic.php?f=29&t=282665&p=1712066#p1712066
Quis custodiet ipsos custodes?

VladyCu
Posts: 12
Joined: Thu Aug 13, 2020 9:39 pm

Re: No HDMI image, tried every solution out there :(

Fri Apr 16, 2021 10:51 pm

drgeoff wrote:
Fri Apr 16, 2021 9:57 pm
Is this the same RPI4B you were using last August? If yes, was the HDMI output OK then? viewtopic.php?f=29&t=282665&p=1712066#p1712066
Yes, it's the same device. As I said in the original post at the end, I always used it headless, could never get the HDMI signal.

aBUGSworstnightmare
Posts: 2806
Joined: Tue Jun 30, 2015 1:35 pm

Re: No HDMI image, tried every solution out there :(

Sat Apr 17, 2021 5:19 am

As your Pi is working fine headless you should be able to run below command via SSH and post the results here:

Code: Select all

/opt/vc/bin/tvservice -m CEA
/opt/vc/bin/tvservice -m DMT
/opt/vc/bin/tvservice -s  
make sure to make this with a fresh Raspbian OS flashed to your uSD, having your monitor connected to HDMI0 (the connector next to USB-C) and 'hdmi_enable_4kp60=1' added to your config.txt.
Don't make any other changes for the moment!

VladyCu
Posts: 12
Joined: Thu Aug 13, 2020 9:39 pm

Re: No HDMI image, tried every solution out there :(

Sat Apr 17, 2021 10:56 am

aBUGSworstnightmare wrote:
Sat Apr 17, 2021 5:19 am
As your Pi is working fine headless you should be able to run below command via SSH and post the results here:

Code: Select all

/opt/vc/bin/tvservice -m CEA
/opt/vc/bin/tvservice -m DMT
/opt/vc/bin/tvservice -s  
make sure to make this with a fresh Raspbian OS flashed to your uSD, having your monitor connected to HDMI0 (the connector next to USB-C) and 'hdmi_enable_4kp60=1' added to your config.txt.
Don't make any other changes for the moment!
Ok, I installed a fresh copy of Raspbian and just added the line you said, it's working now but wit lot of red and blue artefacts.

This is the result of your commands.

Code: Select all

pi@raspberrypi:~ $ /opt/vc/bin/tvservice -m CEA
Group CEA has 16 modes:
           mode 1: 640x480 @ 60Hz 4:3, clock:25MHz progressive
           mode 2: 720x480 @ 60Hz 4:3, clock:27MHz progressive
           mode 3: 720x480 @ 60Hz 16:9, clock:27MHz progressive
           mode 4: 1280x720 @ 60Hz 16:9, clock:74MHz progressive
           mode 5: 1920x1080 @ 60Hz 16:9, clock:74MHz interlaced
           mode 6: 720x480 @ 60Hz 4:3, clock:27MHz x2 interlaced
           mode 7: 720x480 @ 60Hz 16:9, clock:27MHz x2 interlaced
  (prefer) mode 16: 1920x1080 @ 60Hz 16:9, clock:148MHz progressive
           mode 17: 720x576 @ 50Hz 4:3, clock:27MHz progressive
           mode 18: 720x576 @ 50Hz 16:9, clock:27MHz progressive
           mode 19: 1280x720 @ 50Hz 16:9, clock:74MHz progressive
           mode 20: 1920x1080 @ 50Hz 16:9, clock:74MHz interlaced
           mode 21: 720x576 @ 50Hz 4:3, clock:27MHz x2 interlaced
           mode 22: 720x576 @ 50Hz 16:9, clock:27MHz x2 interlaced
           mode 31: 1920x1080 @ 50Hz 16:9, clock:148MHz progressive
           mode 32: 1920x1080 @ 24Hz 16:9, clock:74MHz progressive
pi@raspberrypi:~ $ /opt/vc/bin/tvservice -m DMT
Group DMT has 12 modes:
           mode 4: 640x480 @ 60Hz 4:3, clock:25MHz progressive
           mode 6: 640x480 @ 75Hz 4:3, clock:31MHz progressive
           mode 9: 800x600 @ 60Hz 4:3, clock:40MHz progressive
           mode 11: 800x600 @ 75Hz 4:3, clock:49MHz progressive
           mode 16: 1024x768 @ 60Hz 4:3, clock:65MHz progressive
           mode 18: 1024x768 @ 75Hz 4:3, clock:78MHz progressive
           mode 21: 1152x864 @ 75Hz 4:3, clock:108MHz progressive
           mode 28: 1280x800 @ 60Hz 16:10, clock:83MHz progressive
           mode 35: 1280x1024 @ 60Hz 5:4, clock:108MHz progressive
           mode 36: 1280x1024 @ 75Hz 5:4, clock:135MHz progressive
           mode 51: 1600x1200 @ 60Hz 4:3, clock:162MHz progressive
           mode 58: 1680x1050 @ 60Hz 16:10, clock:146MHz progressive
pi@raspberrypi:~ $ /opt/vc/bin/tvservice -s
state 0xa [HDMI CUSTOM RGB full 16:9], 1920x1080 @ 60.00Hz, progressive

andrum99
Posts: 1415
Joined: Fri Jul 20, 2012 2:41 pm

Re: No HDMI image, tried every solution out there :(

Sat Apr 17, 2021 11:15 am

VladyCu wrote:
Fri Apr 16, 2021 9:21 pm
Hello!
As I said in the title, I can't get any image out of my Raspberry Pi 4 (4GB).
The only way to see something is if I start it without an SD card. Then it shows me some messages on a red backgroud. Image is bad, like flikering some black artefacts.
As soon as I put in the SD card and it boots, display just keeps Entering Power Save mode, than turns off, then again Power save and so on forever.

I tried every solution for config.txt, I tried removing it, nothing works. I have an QHD Dell monitor with HDMI input, using the original Raspberry HDMI cable. Also tried on my Philips 55" TV, it tells me I have no signal on that cable.
I have a 3A power supply, also tried with the one from my Samsung Phone (2A), exactly the same thing.

This is really frustrating, I can't understand what is going wrong. I have the device since 2019 and always used headless because of this :(
If you are seeing distortion on the screen then this is down to a problem with the HDMI signal itself. This will likely either be caused by the Pi itself or any cables and adaptors used to connect the HDMI signal to the screen. If you have tried different cables / adaptors then it could be that the HDMI output of the Pi is faulty. If this is the case, then you would need to speak to whoever you bought the Pi from: the contract of sale is with them.

VladyCu
Posts: 12
Joined: Thu Aug 13, 2020 9:39 pm

Re: No HDMI image, tried every solution out there :(

Sat Apr 17, 2021 12:04 pm

Ok, after removing the card and inserting it back, it doesn't work anymore.

aBUGSworstnightmare
Posts: 2806
Joined: Tue Jun 30, 2015 1:35 pm

Re: No HDMI image, tried every solution out there :(

Sat Apr 17, 2021 3:16 pm

Your monitor only supports FHD from what you've posted above; not even showing anything near QHD.
You are using HDMI0 with only one monitor connected? MicoHDMI is fully seated (problem with some cases i.e.)?

Removing the uSD and inserting back? For doing what? Maybe your uSD is faulty as well

VladyCu
Posts: 12
Joined: Thu Aug 13, 2020 9:39 pm

Re: No HDMI image, tried every solution out there :(

Sat Apr 17, 2021 11:57 pm

Okay, I found the problem. My monitor has 2560x1440 resolution, but only HDMI 1.4 which actually supports 1920x1080.
Still, image is crappy, full of red artefacts. I read that poor quality cable could be the problem, but I have the original Raspberry cable, which is strange. And being a micro-HDMI, I don't have any other cable to test...
20210417_133311.jpg
20210417_133311.jpg (159.3 KiB) Viewed 305 times
20210418_024943.jpg
20210418_024943.jpg (150.77 KiB) Viewed 305 times

aBUGSworstnightmare
Posts: 2806
Joined: Tue Jun 30, 2015 1:35 pm

Re: No HDMI image, tried every solution out there :(

Sun Apr 18, 2021 6:17 am

Do you have only one cable? Might be worth to check if the cable/connector is causing the issue. Would then also check with two monitors connected at the same time to see if there's an issue with rhe Pi.

Maybe you can let a frend of yours test the Pi with different monitor.

andrum99
Posts: 1415
Joined: Fri Jul 20, 2012 2:41 pm

Re: No HDMI image, tried every solution out there :(

Sun Apr 18, 2021 4:32 pm

VladyCu wrote:
Sat Apr 17, 2021 11:57 pm
Okay, I found the problem. My monitor has 2560x1440 resolution, but only HDMI 1.4 which actually supports 1920x1080.
Still, image is crappy, full of red artefacts. I read that poor quality cable could be the problem, but I have the original Raspberry cable, which is strange. And being a micro-HDMI, I don't have any other cable to test...
20210417_133311.jpg20210418_024943.jpg
Not true - HDMI 1.4 supports up to 4K x 2K at 24Hz. In fact, your screen's resolution of 2560x1440 is supported at up to 60Hz.

Is the Pi 4 inside a case? Try removing it from the case, since badly designed cases can prevent the micro HDMI cable from being inserted fully into the Pi.

Assuming you bought the Pi and cable from the same place, I would see if you can return both for free replacements. Depending on where you live, the retailer may be legally required to do so, or issue a refund.

In the UK the warranty on electrical goods is a minimum of 12 months from date of purchase. Within the first 14 days, you can also return the goods for any reason for a refund, under distance selling regulations. (Assuming you didn't buy the goods in person from a store).

geev03
Posts: 238
Joined: Thu Jun 07, 2012 12:40 pm
Location: London, UK

Re: No HDMI image, tried every solution out there :(

Sun Apr 18, 2021 5:33 pm

>20210418_024943.jpg

I experienced such a distortion ( on a rPi-400). The problem disappeared when the HDMI connection was moved to the one nearest to the microsd card slot.

VladyCu
Posts: 12
Joined: Thu Aug 13, 2020 9:39 pm

Re: No HDMI image, tried every solution out there :(

Sun Apr 18, 2021 6:48 pm

Optimal Resolution:
2560 x 1440 at 60 Hz
Our VGA connector can only support up to 2048 x 1152 (Bandwidth Limitation). Our HDMI is 1.4 is compatible and can support up to 1920 x 1080

This is from the monitor manufacturer's website, DELL U2713HM.
I also have a newer BENQ 32" 4k monitor, but haven't tried on this one.

Pi wasn't in any case. I also tried both HDMI slots, but the thing is if I move the cable just a little, I lose the image. It comes back only with a reboot.

Anyway, I'm keeping this Raspberry headless in the house just for managing the DHCP server and the DNS server with Pihole. This was just a frustration of mine :)

aBUGSworstnightmare
Posts: 2806
Joined: Tue Jun 30, 2015 1:35 pm

Re: No HDMI image, tried every solution out there :(

Sun Apr 18, 2021 6:58 pm

VladyCu wrote:
Sun Apr 18, 2021 6:48 pm
Optimal Resolution:
2560 x 1440 at 60 Hz
Our VGA connector can only support up to 2048 x 1152 (Bandwidth Limitation). Our HDMI is 1.4 is compatible and can support up to 1920 x 1080

This is from the monitor manufacturer's website, DELL U2713HM.
I also have a newer BENQ 32" 4k monitor, but haven't tried on this one.

Pi wasn't in any case. I also tried both HDMI slots, but the thing is if I move the cable just a little, I lose the image. It comes back only with a reboot.
VGA converter ... avoid it if possible.
Do you have another Pi4 to test with? You snould test the 32in as well, either your cable is not fully seated, and/or the sockets/plug is damaged. My offical cables go in quite stiff,

And - if possible - test with two displays connected to rule out issues with one of the connectors (as HDMI0 is the primary as long you don't tell Linux something else).
Only have this picture showing the official cable in use wifh RPi4. As the Pi is in an armour case you can only get some idea what it looks like when fully seated.
Image

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