New Pi4, Rainbow then Black Screen

hootie318 · August 2, 2021 at 4:42 PM

I just received a fresh new RPi4. I downloaded 9.97 on a new card. Goes to rainbow screen and then nothing but black. Tried to go back to 9.26 and the same.

I am in the hdmi0 port. I have 5 other Rpi4s and using Libre for years. I have never had this issue. I tried the same install on 2 other RPi4s and the same thing happens.

Any ideas?

**Da Flex** · August 2, 2021 at 11:19 PM Official Post

Did you had to do config.txt edits on former LE versions?

hootie318 · August 2, 2021 at 11:30 PM

Could be a false alarm. The TV was manufactured in 2012. I tried a newer one and it has booted to setup. Dont know if that was a thing but it is all I have to go on right now.

**Da Flex** · August 2, 2021 at 11:49 PM Official Post

HDMI mode settings have been moved from config.txt to cmdline.txt since LE 10.0 Beta. Maybe you've been tweaked the config.txt to make the 2012 TV work.

hootie318 · August 3, 2021 at 3:39 AM

I have never had to modify anything before. I did a fresh install on a new card and new board. Had the problem and then tried swapping boards and cards. Then switched TVs and everything worked on all my other TVs just not the one I started with. It's working now with no mods to any config just not on that one TV.

I can only assume that it's that TV.

stuckinthehouse · August 3, 2021 at 3:59 AM

Did you try one of the LE 10 test builds?

**HiassofT** · August 3, 2021 at 9:40 AM

Try adding video=HDMI-A-1:1280x720M@60D to the end of cmdline.txt (separated by a space from "quiet", everything has to be on a single line).

If it's a HD-ready TV then probably the RPi4 doesn't like it's native/preferred resolution (well known issue).

so long,

Hias

New Pi4, Rainbow then Black Screen

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