MSI GT77 Titan – Will Not Power On After Normal Shutdown (EC Freeze Suspected)

[dreestituskraus15f802f1]

Hello,

I am requesting assistance with an issue on my MSI GT77 Titan laptop. The system was working normally and shut down properly the previous night. The next day it would not power on.

Symptoms

Pressing the power button results in a single brief keyboard flash, but no fans, no boot, and no display.

The 330W MSI power adapter LED remains solid when plugged in (does not blink or shut off).

No charging LED or response after that initial keyboard flash.

Troubleshooting Performed

EC Reset (Long Press)

Unplugged power adapter

Held the power button for 60–90 seconds

During this process, the power button LED blinked white around 8 times, then stopped

Reconnected power and attempted to boot — no response

Full Power Drain Reset

Removed all peripherals

Unplugged charger

Held power button for 60 seconds, waited, then repeated a 30-second hold

Reconnected power — still no boot

Bottom Cover Removal

Opened the laptop to access the internal battery

Located the main battery connector

Attempted to disconnect it to perform a full EC/power-rail reset

The connector is extremely tight and difficult to remove, and I stopped to avoid causing damage

Current State

The laptop still does not power on.
Based on symptoms, it appears to be an EC or power-rail latch issue, not a dead motherboard, but I cannot complete the internal battery reset due to the tightness of the connector.

Request

I would appreciate official guidance on:

The correct procedure for disconnecting the GT77 battery safely

Whether the symptoms observed (single keyboard flash + stable charger LED + EC blinking during long hold) indicate a known EC/power-rail issue

Whether a BIOS/EC recovery or service center intervention is required

Any assistance from MSI staff or users with experience on the GT77 Titan would be greatly appreciated.

Thank you.

 

[Raju]

There is no MSI staff on the forum.
For your questions, the EC blinking during long hold is a normal behavior during EC reset.
And there is no correct procedure for disconnecting the battery, it is quite tight and needs to be careful when doing that.
Since your laptop cannot turn on even after EC reset, and you are afraid to damage the laptop, I would recommend sending the laptop to the service center for further assistance.