Dell Precision 5760 motherboard replacement 19873-1 to 19876-1

As long as the board has the same arrangement of ports, they will swap.

Unfortunately, I'm encountering an issue after installation.

Symptom: After powering on the laptop, the battery light blinks with 2 orange and 7 white flashes. The official manual indicates this as an LCD connection problem.

Observations:

• The laptop starts and displays the Dell logo.
• However, it shuts down shortly after with the same blinking lights.
• I've run the LCD diagnostic (pressing D during startup), and it passed successfully, displaying the correct sequence of colors.
• Connecting external monitors has not resolved the issue.

Based on these observations, I suspect the problem may not be solely related to the LCD.

I've seen some online discussions suggesting the issue might be related to RAM. I've tried switching RAM positions and different configurations, but this has not resolved the problem.
Unfortunately I don't have friends who can share RAM to me for testing. Now Im considering to buy cheap 2x4GB RAM for testing the motherboard and my assumptions.

I would greatly appreciate any advice from anyone who has encountered similar issues with this motherboard model or has any troubleshooting suggestions.

This is not a RAM issue, but the failure to see an image with an external screen points to the fact that it is a mainboard issue -- replace the system board.

Thank you @ejn63 for helping! After some considerations I came to the same conclusion - might be GPU issue.
I've requested return & refund the motherboard, gonna try another one configuration closer to original. 

@kkarpyshev​ 

My laptop had an issue where there was an exclamation mark next to the 3060 graphics card.

I suspected it might be related to either the chip or the BIOS, so I started with the BIOS.

I programmed the new BIOS and forgot to save the old one.

Now, I’m facing a new problem: the device won’t boot at all, and I can’t find the BIOS file anywhere.

Please, if anyone has the appropriate BIOS, kindly send it to me.

Board number:

Stradale MLK TGLH MB 19876-2

Hi @ejn63 and chat,

My journey continues, I recently returned my previous motherboard and received a replacement with the same configuration as my original (19873-1 11850H A2000). Have installed it with no issues.

However, I'm still unable to start the laptop.

Observations:

• The laptop displays the Dell logo and then goes to a black screen.
• The battery light blinks 2 orange and 8 white lights.
• After a short time, the Windows greeting sound plays, but the screen remains black.

Troubleshooting Steps:

• Display diagnostic passes succesfully
• Used the original AC adapter, both with and without the battery.
• Tried connecting external monitors via USB-C and HDMI, but the screen remains black.
• Unable to enter BIOS settings - the screen remains black, but without the Windows greeting sound.
• Attempted a BIOS reset (pressing and holding the power button while the AC adapter and battery are disconnected).
• Tried switching RAM positions and unmounting the SSD.

Based on these observations, I suspect a programmatic issue.

I'm at a loss for how to proceed and resolve this problem. This is the second motherboard replacement I've attempted, and I'm concerned that other laptop components might be malfunctioning.

I kindly request your assistance in diagnosing this issue if you have any inputs. 
Thank you so much!

2.8 is not the same error you mentioned before (2,7). 

2,8 is a display failure.  

What happened to damage the mainboard initially?  

And can you get an image on an external monitor?

@ejn63 
> What happened to damage the mainboard initially?  
It was burned in place under SSD 1. I don't know what happend exactly. There is no elements on motherboard in this place visually

> And can you get an image on an external monitor?
No, same black screen. But it receives the signal as I understand. Both UCB-C and HDMI

> 2.8 is not the same error you mentioned before (2,7). 
My previous replaced motherboard 19876-1 was from XPS 17 9710. The current one from Precision 5760 as original. Light codes meanings are slightly different

I've recorded the video, attaching here if it helps. You can here Windows greeting sound in the end of video and battery light is not blinking this time.

@kkarpyshev​ Use Arctic Silver thermal paste between the heatsink and cpu/gpu. Provides great heat transfer.