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The 7th-generation Surface Pro, released in October 2019. Available in platinum and black. Model number: 1866.

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Surface Pro 7 Display-related failure

This computer is really important for uni, so please leave a reply with ANY information or other resource you suspect might be useful. Thanks!

Two days ago while writing in onenote, the display on my 3 year old Surface Pro 7 just froze up with thick lines of digital noise covering a large part of the screen. After restarting the computer it can't get past the Microsoft boot logo. Video output using the USB-C port is completely fine, but although it lists two displays, the OS shows the built-in display as greyed out (disconnected?).

Tried: All types of force-restarting, draining battery, booting to BIOS (can't display it)

I suspect part of the screen is broken for some reason, but what puzzles me is the boot logo? Obviously the LCD isn't broken if it can display the logo without problems. What I'm wondering now is what part of the computer is responsible for showing the Microsoft boot logo on the display?

  1. Is it the OS or BIOS? (In this case, this would mean the screen can accept a signal, right?)
  2. Is it programmed into the display board shown in this guide?

In the second case, I suspect a screen replacement wouldn't necessarily resolve anything if the display board has lost its signal in or out?

Respondido! Ver a resposta Também tenho esse problema

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Breaking this comment up because there is a character limit.

(Part 1 - Similar Situation)

I Dropped my surface and the screen cracked. It was still working, but the glass was shattered, and it needed to be replaced. I purchased a replacement screen from here and very carefully went through with removing and replacing it myself. However, now the new screen is plugged in and when I power it on, I get the Windows logo for 3-5seconds. It then disappears and I am stuck with a black screen. Plugging it into an external display the computer is usable. Camera (with the FaceID and LED), speakers, keyboard all work. Sound familiar to you?

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(Part 2 - Things To Look At:)

-in Device Manager the internal monitor is not listed under Monitors.

-My Display Adapters - Intel Iris. Device status is working properly. However, the Events tab I have some "Device not started" events. Device PCI\VEN_8086&DEV_8A5A&SUBSYS_00371414&REV_07\3&11583659&0&10 had a problem starting.

Under Human Interface Devices, I have 2 devices with error warnings. Intel Precise Touch Device - "This device cannot start. (Code 10) STATUS_DEVICE_DATA_ERROR" & Surface Tcon Device - "This device cannot start. (Code 10) STATUS_DEVICE_POWER_FAILURE"

I will be trying the smaller touch screen digitizer board you mentioned in your post, but it seems strange to me that the display would be disabled based on this board being shorted. Still worth the shot and I will let you know how it goes.

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@piper4123w Please do! It doesn't sound like our device managers show the same thing though. While I can't check right now, I believe that literally everything worked for me, except the display. I've asked around on different forums and apparently the boot logo on surface devices is handled by a independent chip that will show it even with the CPU/GPU removed. Since I don't know if this chip is on the display assembly or the motherboard I don't know if I should fork out the 200 euros for a new display just yet. Currently it's 400 for a microsoft (guarateed) repair vs 200 for a (probably unlikely) DIY repair.

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@chriiis I would be interested in seeing a link to the forum that mentioned the separate chip responsible for the logo. It seems weird to have the screen be responsible for that for diagnostics reasons. Not to mention it gives hope to someone post-repair and then immediately crushes those dreams.

Anyways, The iFixIt screen is actually my second screen replacement attempt for this issue. The first screen I got form Amazon. It did the same thing but I blamed the part/non official supplier. I also have attempted to replace all ribbon cables and have a replacement touch digitizer on the way. If all of these things keep my machine broken, then I am inclined to blame the motherboard which is the most intrusive and expensive to replace.

Assuming our problems are at least similar, it is likely worth considering the Microsoft Option. I will get back to you Monday after the new digitizer board arrives but my hopes are not super high.

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@piper4123w I got it from badcaps.net (https://www.badcaps.net/forum/showthread...) although that was just my working theory because it was the only info I had. The block diagram of the Pro 7 didn't show any special IC but also not even the BIOS chip.

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Update 10 months after sending the computer in for official repair by Microsoft:

The screen now experiences the exact same issues and is once again out of warranty (90 days for repairs).

For future people experiencing the same situation and symptoms, I’d highly advice you to just replace your own screen instead of dealing with microsoft’s sketchy repairs.

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@chriiis

Did you try this method to get into BIOS with a display?

Since you have an external display did you try the diagnostic toolkit and checked if it showed anything?

Not too sure re Surface models but on most PCs the video for the BIOS display and the maker's startup logo is supplied by the BIOS chip via the IO chip and it is basic vga video resolution. Once it boots into an OS it is the OS that supplies the video signal information.

As can be seen in this image from the schematic for the laptop the display is tied directly to the SoC IC (System on a Chip) which is a combination chip that handles everything (I couldn't find a free download for the schematics but it's still cheap enough)

Block Image

(click on image)

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Thanks for the answer! Yes, I've tried to get into BIOS but no, I have not tried the toolkit yet. I found the full schematic with higher resolution and it does say the intel SoC is connected directly via embedded DP to the display. The way I understand it now (correct me if I'm wrong) is that either the display or the eDP port on the SoC is broken, with the display being the more likely culprit I assume? Here's what I understand are the key points right now:

Since the BIOS connection to the display is still fully functional, but as I understand it, separate from the eDP, the LCD doesn't necessarily have to be broken since it displays the logo fine.

Seeing as the USBC port is entirely separate from the SoC's eDP bus on the block diagram, my display out with a USB-C hub proves the GPU is fine, but not necessarily the eDP out.

So I'm left not knowing what part of the chain between eDP and LCD is dead? Also, what could "Avocado" be on the diagram? https://imgur.com/a/X45X9V7

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@chriiis

I don't think that the BIOS connection to the display would be separate from the eDP as looking at the image I posted the eDP is the only connection between the SoC and the Avocado which I think is the video driver board or circuitry for the display panel. Not the GPU but how the video signals are translated so that the panel reacts accordingly, similar to a TV's tcon board i.e. the interface between the mainboard and the screen

There is no other way for the video signal to get to the display

eDP just means embedded display port so it has more wires that are used to supply backlight power, controlling brightness in the display, ambient sensors if any etc which a DP hasn't got.

Since the logo works then to me the whole chain from the SoC to the display is working.

What seems to be the problem I think is that you can't get into BIOS for some reason with a display (corrupted BIOS?) and also that the OS is not being displayed on the LCD panel. Maybe that's related.

Check what the toolkit shows first if anything.

See if you can update the firmware if possible. Do a backup first to save your data just in case ;-)

Don't know Surface laptops but do they have the option to have both displays i.e. internal and external on at the same time? If so what do you get?

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@jayeff the toolkit didn’t return anything useful. Yes, I’ve had it set to display on both monitors but the built-in display is greyed out in settings with no resolution or other information regarding it presented. I’ve now tried to reinstall pretty much every driver and attempted just about every software fix I can imagine short of resetting the entire PC. Found someone on reddit with the exact same specs and problems and their reset fixed nothing. Could the BIOS really be corrupted if it boots into windows just fine?

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@chriiis

Just wondering if you get a display on the external monitor if you start the laptop in safe mode.

If not press Win key + P key both together a few times.

Thinking is that safe mode doesn't load specific video drivers only generic Windows drivers are loaded and these are vga resolution which is the same as BIOS video resolution.

If still no good it could be the Avocado having problems a certain resolution but since you can't get the laptop display it's like it's not communicating with the OS

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Here is what the OS sees and shows. Settings: https://imgur.com/a/sB8WySM

Device Manager: https://imgur.com/a/n5f3oUJ

Windows does seem to recognize the display in DM, but not in the settings?

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