External monitor connected to laptop stops showing picture after initial screen when laptop is booted without the orignal LCD panel.

[Owper Nup]

I have a laptop of which LCD panel's backlight has stopped working. Since then I've been using an external monitor, which normally works without any problems.

However, if I disconnect the laptop's panel (the one with no backlight), or if I plug another spare one in its place, then when I boot the computer, the external monitor shows the manufacturer's logo at first (so it's plugged and working as it should) but then it stops showing me anything, as if it had been disconnected. When that happens, I am left without any working screen (the spare LCD panel that I am plugging in doesn't seem to be showing me anything neither, at the moment, but that's fine for now).

Any idea why this is happening? I need the external monitor to function because I can't test a spare LCD panel on the laptop if I can't even access the relevant screen options in Windows.

 

[next3r]

EDID vs VBIOS vs EC FW/BIOS
all must be correct for all function like G-sync

you have unlocked bios ?? try SA domain "this contains GPU/output"
or customized intel GOP "when have optimus"

but all this setups is extreme risky for notebook !!!
and NVIDIA vbios mod is possible .,,.but flash only via HWprogramer.

edit
send bios DUMP or page where is bios "i try check setting"

 

[Owper Nup]

I once did some changes in the bios (these changes were later reverted), so I believe the bios is unlocked. Unlocked means you can make changes to it, right?

I must admit that I don't fully understand the rest of what you're saying. What's SA domain? I did google it of course but I can't seem to find anything related to this matter.
Also, I don't know what you're saying about customized Intel GOP or optiums...???

What settings in the Bios are relevant to this? What should I check?


But I don't actually think it's about that, to be honest, because... if the external monitor initially works when I boot the laptop without its original LCD panel, and I can see the manufacturer's logo before Windows loads, then why would it gets un-detected and stop working? It shouldn't be about compatibility or drivers or Bios... just an external monitor that is working already with the laptop, it just gets un-detected as if it got unplugged, and only does this if I remove the current panel from the laptop, or I swap it from a different one.

But please feel free to explain this better to me, because clearly I don't understand all of it.

 

[next3r]

notebook what you have ??

igpu + d-gpu mode > optimus >> here works Intel GOP rom
or D-gpu native > SA domain contains some GPU setting or for output

unlocked >> mean fully unlocked bios "all access for all domains"
ADVANCED tab contains 20+ sub-menus ??

 

[Owper Nup]

It's this Clevo model.

So the Optimus that you're talking about Nvidia Optimus, right? And IGPU and DGPU mean integrated and dedicated graphics... now I start to understand what you're saying.
I'm gonna check the Advanced tab in the Bios now and let you know in a moment!

 

[Count von Schwalbe]

Does the laptop have a dedicated GPU in it?

Ninja'd

 

[next3r]

or try only per-configure primary display setting in windows
before you unplug internal monitor

but when run external monitor and not working internal ,.,.how look gpu status "error43" or basic drivers only ??
EDID vs vbios or others FW is very complex on notebooks "works ony via hwid whitelist"

 

[Owper Nup]

Yes the laptop has a Nvidia 2070 Super.

I just went in the Bios, mine is called Insyde H2Bios.
Here's the entries I have in the Advanced menu:
- Advanced Chipset Control
- Thunderbolt Configuration
- Overclock Performance Menu
- SATA Mode
- Battery Low Alarm Beep

Didn't seem like I could scroll down to see more options. So those are all I can see. Does that mean that my Bios is locked?

or try only per-configure primary display setting in windows
before you unplug internal monitor

What does this mean? Per-configure? As of right now, since the blacklight of the laptop's panel is not working, I have in Display Setting to show only monitor 2, which is the external monitor.

but when run external monitor and not working internal ,.,.how look gpu status "error43" or basic drivers only ??
EDID vs vbios or others FW is very complex on notebooks "works ony via hwid whitelist"

Sorry but I don't understand this neither. Where's this error code supposed to be showed?

 

[Count von Schwalbe]

What does this mean? Per-configure? As of right now, since the blacklight of the laptop's panel is not working, I have in Display Setting to show only monitor 2, which is the external monitor.

If you have no internal monitor, try setting to duplicate.

 

[next3r]

now you using external monitor ?
check device manager and nvidia drivers ,,,and in this configuration external monitor + gpu works good ,??

bios is locked ,,.but insyde i not support AMI only
or i will try find variable offsets but translate all how this works is problem

this g-sync notebook ,,this is problem
monitor EDID vs VBIOS vs EC fw must be correct or stuck device > error43

>>>>
probarly you don't have a bios file??
this models not have bios packages on support pages.

or dump ,.,,.but best is CLEVO forum "if exist" or winraid and full bios mod
you must have access for all domains for TEST custom setup

or modded FW "edit white list"

 

[Owper Nup]

If you have no internal monitor, try setting to duplicate.

Not sure what good would this do. Perhaps my situation and what I am trying to accomplished wasn't explained very well.
If I remove the laptop panel and I am left with only the external monitor, which does show a picture as soon as I turn on the computer but acts as if it got disconnected as soon as Windows starts to be loaded, what would that setting do to help? That would need to have more than one monitor connected to do anything to begin with, so it's noting to do with my situation.

now you using external monitor ?

Yes, I am. The external monitor works fine.

I'll repeat again what my situation is.

1. I have a laptop and an external monitor attached to it. Both screen used to work at the same time without problems.
2. The laptop's own LCD panel stopped working (the backlight doesn't turn on).
3. Since I have two other spare LCD panels, I wanted to test them on the laptop, to see if they work or not.
4. So I unplugged the original LCD panel, and only left the external monitor connected, but when I boot the laptop, first I see the manufacturer's logo, then the external monitor acts like it has been unplugged before I can see anything else (I don't see Windows loading).
5. The same thing happens if I plug in a different LCD panel on the laptop and then turn it on. I don't see anything on the spare LCD panel, and the external monitor does the same thing as the previous step.

If you guys think I should check something specific in device manager, in the bios, or anywhere else, please point me to where exactly and I'll go check.

translate all how this works is problem

What is your native language? Just in case I speak it...

 

[next3r]

small chance for skip this problem "but i'm not sure " via TB3 connection/setup
or what do you use?? hdmi is probarly native on D-gpu

edit
any hw change > ec reset or CMOS reset
for correct device initialization

 

[Owper Nup]

The external monitor is connected to the laptop through HDMI port.

 

[next3r]

Do you know what version ME FW is?
i will send file for bios DUMP

edit
HWINFO>MOTHEBOARD > ME FW

or you have any file + bios ??
i will try check bios defaults setup ,.,.but need file

 

[Owper Nup]

edit
any hw change > ec reset or CMOS reset
for correct device initialization

no recent hardware changes other than... taking out the panel itself

Do you know what version ME FW is?
i will send file for bios DUMP

edit
HWINFO>MOTHEBOARD > ME FW

Intel management engine firmware? It's easier for me if you write the full name rather than the abbreviation.

These are the only info about the motherboard that I see in HWInfo:

Chipset: Intel Z490 (Comet Lake PCH-H)
BIOS Date: 07/03/2020
Version: 1.07.03RTR1 UEFI

EDIT: Oh wait, I found it:

Intel ME Version: 14.0, Build 1165, Hot Fix 37

 

[next3r]

try luck > fw14
run .BAT as admin ,.,.and this create OEM.BIN in folder
if this possible on this bios

edit
DUMP file send here for more info .,,but AMI bios is better for this :/
or WINRAID FORUM > for better help/mod

 

[Owper Nup]

Dude I truly appreciate your engagement with this but given the slight language barrier and the fact that I am not fully understanding many of the things you are telling me about, there's no way that I can just run an unknown executable file like that on my computer without knowing what it is even supposed to be doing.

 

[next3r]

Dude I truly appreciate your engagement with this but given the slight language barrier and the fact that I am not fully understanding many of the things you are telling me about, there's no way that I can just run an unknown executable file like that on my computer without knowing what it is even supposed to be doing.

I created an AUTO CMD for you > .BAT
only run .BAT and get BIOS.BIN in folder or check warnings "insyde not must works identical like AMI"

but this is SAFE ,.,.only DUMP "capture system bios" and create file

edit
WINRAID FORUM > for better help/mod

Win-Raid Forum

Guides, Drivers, Firmware, Research & Discussions regarding Computer Storage, BIOS/Firmware Modding, System Performance, Optimization etc

winraid.level1techs.com

>>>>>>>>
ADVANCED
System Agent (SA) Configuration
>Graphics Configuration
>LCD Control

here must try luck setup external monitor > primary device
bios unlock or send dump for next step

try send post "request" on WinRaid for full bios unlock > easier way for you
.,than my RU.EFI + offsets

but RU.EFI - more safe but need skill or fully translated easy guide

// try send DUMP or check WINRAID FORUM
good luck

or absolutely best is spare LCD panel ? "identical ID"

 

[Count von Schwalbe]

Not sure what good would this do. Perhaps my situation and what I am trying to accomplished wasn't explained very well.
If I remove the laptop panel and I am left with only the external monitor, which does show a picture as soon as I turn on the computer but acts as if it got disconnected as soon as Windows starts to be loaded, what would that setting do to help? That would need to have more than one monitor connected to do anything to begin with, so it's noting to do with my situation.

Ok, I was thinking that Windows might be trying to display to a second screen, whereas the external monitor has become the first screen. However, if replacing the LCD and using both monitors does not work, I am not sure.