Both internal and external display not detected.

I ran the disagnostics and it says fan and display issues (Was able to get this much in an external monitor). I have edited the question to attach the screenshot. I can't really reinstall macOS as it gets stuck at some point (cant see further progress on external monitor) and cant continue. Also I might even lose the little access I had via anydesk.

@bishalheuju - Okay, so this is a hardware issue.

Unfortunately Apple has made repairing hardware very tricky.

I'm not sure how comfortable you are with repairing Macs, but my best guess is that the logic board needs to be replaced. The fact that the fan, display, and external display are not working correctly makes me think the logic board is broken.

But, before going too deep into that, try (if possible) using a different monitor. There's a slim chance that the Mac no longer "wants" to use the monitor you're currently using.

Best of luck!

Had tried with other monitors as well. But didn't work. I suspect it to be something related with configuration because external display works till some part in recovery mode, or diagnostics mode. Could there be any configurations related?

@bishalheuju - I wish I could understand exactly what you mean. I’m afraid I don’t. The only time the displays showed something else than what was connected is when I tried running macOS on an unsupported Mac. But, that deals with kext, and I don’t believe is struggling with kext right now.

By any chance, do you have access to another Mac? Because if you do… you could try using the OpenCore legacy patcher. By using OpenCore, you could create an EFI partition on a separate USB drive. That could prove once an for all if this issue is software related.

OpenCore is quite tricky to use, so I won’t walk you through every step just yet. Simply let me know if you have access to another Mac. Then we’ll go from there…

I have access to this broken display macbook via anydesk. Will that work? Otherwise I have a hackintosh, made using the opencore you mentioned, by using other's efi that they shared.

"With the external display as well as keyboard and mouse connected, restart your system as soon as you do close the display lid, that will fire off Clam Shell mode." I can't do this. The external display stops working before that. Even disconnected the internal display to force to external display, but not working.

My suspect is why does the mac shows 23" display instead of default 16" Retina display. Are there are internal level stuffs that I can change?

Thank you!

@bishalheuju - Why can’t you do this simple test? I’m suspecting you are jumping to a conclusion that is faulty here.

Please just give it a try you might be surprised!

As far as the displays setting this doesn’t make sense unless it’s just the wrong display. You can’t alter the display it is what it is.

Sorry and thanks. I did the test you mentioned, however the display didn't work. I was mentioning about the display because, the external display used to work before. Then when I took for repair, the repair shop said they tried a screen but were unsuccessful (don't know what they did). It was after that, that the external display also stopped working. I probably am not able to explain the problem clearly as well as it is a weird problem, and also I do not know what is wrong. You could have probably helped a lot if you had access to the device.

Will this help though? I have gfxcardstatus installed and when trying to swtich to integrated mode it says cant switch and is used by displaypolicyd (screenshot attached in question as edited). Again Thanks!