Msi laptop black screen with no backlight on boot but works with fn+f2 and safe mode.

Ok so i have MSI GX640 (yes ancient) which i recently 2 months ago upgraded to i7 720qm (free from other laptop) and gtx 860m (2gb, for 140$) and added 2gb ram (ram) from i5 430m and amd 6600a. and its been working nicely for past month.

Ok so almost a week ago, on 4th to be exact, i shutdown my laptop which has finished battery with unplugging the power by mistake, but i have done that 50 times maybe.

Now when i start my laptop, it shows pitch black screen with no backlight and i have to hit the fn+f2 (external screen button) quickly in the bios place for screen to light up otherwise it wont if it passes through windows logo area if i dont press fn+f2, and it does boot bios if i press delete buttons, but after showing the windows 10 logo with the moving round thingy, it justs hangs black with backlight until it restarts the laptop to without backlight screen then i have to press fn+f2 again.

the only way to boot it up to windows is to use safe mode or disable graphics card and boot with microsoft standard graphics driver. the moment i start installing nvidia driver it justs crashes and restarts to black screen or if i enable the nvidia adaptor in device manager if i am booted in normal way.

Now the external tv with hdmi works nicely with nvidia driver, if i connect the laptop with tv hdmi before clicking on start button and booting afterwords it just boots nicely to windows with nvidia driver working and playing without any problems at all. when booted to tv the laptop screen is just black with no backlight and its like it doesnt reliase it exists and projecting also doesnt work and it doesnt detect in settings area.

I have reinstalled many versions of nvidia drivers (390, 386, 378, 359) but nothing works and i have reset the windows 10 to blank and i have installed windows 7 on another drive and still not working the moment i use nvidia driver. Infact i have replaced the gpu manually to the old amd 6600a and it still had black screen.

i have done like 100 different type of experiments to fix this but it seems nothing is working. like pressing power button without battery and unplugged. i have spend almost 220$ 2 months ago on this to be decent gaming machine and i know its an old laptop but i wanted to continue til 2019. right now i am using basic microsoft standard vga driver with lower resolution and bad video playback when watching tv series etc and no gaming at all. i have also flashed the latest bios and ef firmware but to no avail.

can someone help me and tell me what is the problem, is it the lcd wire, i can get that for 8$ but changing it will be challenge since i super-glued the hinges.

 

Is it possible this was done with the meltdown and spectre windows updates that were issued on 3rd January. Since it won't start on 4th. And I unplugged the power in the middle of the update.

I cant even uninstall the updates of that day kb4056892 as when it restarts twice and reaches 97% it says can't complete updates and start undoing thr whole thing.

 

After much much much more invistigations I found out that the laptop is not detecting the edid on my monitor. Since I reset the windows there is no trace of it in registry either. My screen is Samsung LTN154MT02. Used many edid tools to extract the edid info but they can't even detect the monitor and I even created a custom edid file but can't find a way to flash it.

Anyway there seems to be a way for windows to override it with inf but that is extremely complicated process. Can someone help me out with it please.

 

This could be a defective GPU, or corrupt OS.

 

i completly reinstalled windows from old windows 10 usb and also changed gpu back to amd 6600a but both didnt work.

 

On widows device manager, does the GPU show normally? On external screen, is everything normal? Even 3d applications and so on?

 

yes but i disabled the nvidia 860m driver, its the only way to load up to windows using fn+f2 at 5 seconds on boot button.

and yes the gpu works flawlessly with external screen and playing games at normal speed and no problems whatsoever.

the external screen only works if i connect it before clicking on power button and when it boots, it thinks that the external screen is the laptop screen.

 

That's a strange behavior indeed...

 

Best to contact MSI to submit for a RMA request and have the system services if possible.

 

Well it's an 8 year old laptop, I am afraid its just anotherror loss of money if I do that. I wish this happened before 3 months before I upgraded The cpu, graphics and battery etc.

I also ordered the lcd wire and will replace that and if still doesn't work then this will become my pc instead of laptop and will buy some cheap and light celeron with big battery performance since my 2 little kids can't help themself but to attack the laptop charging switch and the laptop itself. I want to charge it and use without charger and remove the electricity switches from room. Probably will retire from gaming for 2 years.

But thanks guys anyway.

 

Gotcha, best of luck to you.

 

ok i went to my IT friend and after a week of research its back to edid problem, the edid is currupted by the combination of nvidea and windows 10. there is a whole 300 pages topic on it here:
http://forum.notebookreview.com/thr...levo-lcd-panels.779449/page-158#post-10090770

In that page there is also a way to flash new edid with linux, but the problem is the edid file, does anyone have working MSI GX640 to extract edid from.

I uploaded a tool here that extracts the edid in dat, i will have to find a way to convert it to bin.
https://mega.nz/#!GoYgHRRT!hiiU6qnqe-1Ez9mxhdS7Zxhj9CqbgazbuAARROfsHRY

So anyone with a working gx640 please help!

 

If you don't find the identical EDID you can just try any other that closely matches your screen. You practically can't cause damage and it's corrupt already, so only to gain and fix.
You may also wanna try CRU: https://www.monitortests.com/forum/thread-custom-resolution-utility-cru

That overrides an EDID and runs the driver "blind" on the given output, so your screen may start working again once the missing/corrupt EDID info is overridden in the registry.

 

the CRU also doesnt work, actually i did find a correct edid with moninfo and made an 128byte edid file using tools and stuff and even made bootable linux usb like in that website with instructions, i flashed the edid and nothing happened, multiple times, everything is correct. i donno.

After that i created the inf file for my monitor using moninfo and disabled driver certificate and installed the inf with overrided edid on the monitor, and even in registry it shows the edid is overriden and no bad edid message but still, as soon as i enable the nvidia driver, its black screen and reboot.

i opened the back of laptop yesterday, there is tiny wire that has been burned by gpu that connects to one of the 4 screws of gpu. i soldered it but still didnt change anything, can anyone tell me what does this wire do, is it related to this problem.




multiple images upload

 

Looks like a ground wire to me

 

What is ground wire, I mean what's it's function. Is it related to the problem u am facing.

 

Ground wire limits the build-up of static electricity. This one is not mandatory on your MSI GX640... I still have one GT640 lying around somewhere in my garage with dead bezel due to excessive load on hinges.

 

so its the not the reason for the for my screen issues, about the hinges it happened to me too on the first year, and to many others who bought this laptop, i build like a ton of superglue around with screws and it and its holding out.

 

I remember not using that wire at all. But I'm pretty confident it has nothing to do with your EDID problem.

 

ah ok, i am afraid if i buy another screen it might not work out or turn out to be inverter problem or something else.

 

I see that you glued the screen bezel due to the damn hinges... I wish I had done the same. It was too late already as my screen bezel died completely. And now it's impossible to find one.

 

well i reopened it over and over to find the solution and reglued it over and over, i am prety sure if the parts are there u can still regule it, you need servral types of superglue and need to force a screw in the hinge screws through the back.

 

Actually the screen bezel was in pieces. I kept the main one but all the tiny bits were thrown to the bin...

 

Hi,
I'm having the same exact problem with my MSI GE60 2012. what's the final solution to this? I'm not an expert or anything, but I thought it might be the newer version of windows messing up with it, so i think i am going to install an older version of windows 10 (which previously worked absolutely fine).