[BUG] Screen flickers / goes black

[thirtythirtyal]

Printer model

MK4S Kit

Firmware version

6.2.0-alpha3-8702

Upgrades and modifications

None

Printing from...

USB Drive

Describe the bug

I sent an email to Prusa again about this. Here is the content of that email.

Still having an issue with screen black-out / flicker when I turn the printer on. I've read the forums and tried everything I saw there (ribbon cable, connectors, firmware etc) and also tried what was recommended by your staff in a chat recently. The ribbon cable is plugged in correctly at both ends. No damage or bent pins. The ribbon cable is flat and not folded sharply anywhere. I have the latest firmware. I'm still dealing with this annoying issue. When I turn the printer on, the screen shows loading, the bar gets about halfway across the screen, then it goes black, flickers various distorted patterns then goes black and the fans turn off. If I turn the printer off and back on five or six times it eventually stops doing that and works fine. It's been on for several days now with no printing issues. When I turn it off, I'll have the screen flicker issue again. It's really annoying and I'm worried it won't work at all eventually. Any new suggestions?

How to reproduce

yes, by cycling the power.

Expected behavior

No response

Files

No response

[CZDanol]

Hello, there is no alpha3 release of 6.2.0 - I assume you meant alpha2.

There should be a new release candidate out soon (within a few weeks) with an option to reduce display refresh speed - that might resolve the issue (it is not a fix, just a check for us to determine what is the cause).

For the meantime, you can try re-seating the display connector on both sides. If that doesn't help, you can also try contacting our support.