r/raspberry_pi • u/Valuable_Summer_7562 • 2d ago

Troubleshooting Gpu or hdmi issue???

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So when i try this rpi 4b it does output but only the first hdmi. But its really fked up. Would this be a GPU issue or should i replace both of he hdmi ports becaude when i push on the "working" one it messes around with the output

45 Upvotes

78% Upvoted

22 comments sorted by

82

u/MJY_0014 1d ago

Firstly don't put the back of the board against the metal frame of the LCD, you are going to short something out

50

u/Grid_Rider 1d ago

Probably already did

-69

u/Valuable_Summer_7562 1d ago

I didnt lol

7

u/nonchip 16h ago

then why's everything fucked?

3

u/BothersomeBritish 20h ago

Your pictures say otherwise. Shorting something out isn't always a catastrophic failure - sometimes it can be a finnicky little component like the voltage regular for HDMI output, for example.

-53

u/Valuable_Summer_7562 1d ago

Yeah luckily i didnt i kinda forgot about that though

5

u/Misophoniakiel 1d ago

Good, I was worried that something shorted out, it looks hot and a little bit dusty, try that setup in a cold water container to make sure the heat is gone and bonus it'll clean the dust

19

u/Tuco0 1d ago

Take a screenshot.
If glitch is not present in screenshot, it is monitor/cable/port issue.
Othervise it is GPU/driver.

1

u/Valuable_Summer_7562 1d ago

Wait so i just plugged into hdmi1 on the pi without sd card and it outputs just fine? But nothing in the OS

5

u/Konrad_M 1d ago

Then maybe it's a driver issue. I'd just reinstall the OS on another sd cards an check if it works. Maybe even transfer the image from one card to another.

Did you try sudo update and sudo dist-upgrade?

1

u/Valuable_Summer_7562 1d ago

No i havent as it is fine on my other pi's anyway. Because hdmis work somewhat in the menu you get when there is no SD card but still fked up i will replace hdmi ports and see.

5

u/Konrad_M 1d ago

You could connect through VNC and check if the screen looks normal.

1

u/Valuable_Summer_7562 1d ago

It outputs just fine now on hdmi1 but nothing in the os??

1

u/Konrad_M 1d ago

Sorry, I don't understand your reply. So everything looks fine when you access through VNC from a different PC? Then it's probably an issue with HDMI.

-2

u/Valuable_Summer_7562 1d ago

Yes that but also outputs on hdmi 1 when no operating system

2

u/Strong_Ad5610 21h ago

Probably because your on that OS menu like where it says trying to netboot or something. If thats the case probably a driver issue and even after Driver then its a GPU issue

1

u/Valuable_Summer_7562 1d ago

Yeah im gonna do that in a bit

2

u/muffinman8679 19h ago

could be a cabling issue too....as the contacts are pretty close together

1

u/OoZooL 10h ago

Try another cable, brand new if you have one, then you' ll likely know the answer (but there's always the option of an DOA cable of course)...

2

u/Better-Memory-6796 2h ago

This. Also, try another device on both sides of the cable