Laptop acting wierd HELP, GT72 Dominator G 1445

Laptop acting wierd HELP
GT72 Dominator G 1445

series of events that happend
1. Laptop is working perfectly, watched a few movies and shut it down
2. switched on the laptop. cant log in using pin. it shows wrong pin after entering 5 numbers (my pin is 6 digits long)
3. logged in using password, but my touchpad is not working(evrything else is fine). synaptics options does not show up in system tray or mouse setting. touch pad also not present in device manager. external mouse works fine
4. tried restarting, reinstalling drivers(different versions), checked touchpad switch off button(Fn + F3) etc. nothing worked. I could log in using my pin after restart. i gave up for the day and shut it down
5. next day when i switched it on touchpads still not working and also the fans were running at 100% and not slowing down
6. after a while the battery indicator started glowing orange/red, and in windows the battery percentage always shows 100% even after being on battery for a long time.
7. when i shut down the system the red light still on (even with ac power removed).
8. next day when i switched on the pc the 'enter' key and numpad '5' key were not working (touchpad and other problems still exist) (also laptop does not swith on without ac power)
9. i tried reseting EC.
10. now touchpad started working but the other problems still exist.
11. i couldnt log in using pin because of the first problem (it shows wrong pin after entering 5 numbers (my pin is 6 digits long)), 5 is the fifth digit of my pin
12. it worked when i used the 5 above querty and not numpad
13. i opened notepad to check which keys work, evrything except the following work
the following keys are replaced by a string of charecters instead
quotes("") not part of it

'enter' = ";'=.vgt]-/
["

'y' = ",hplok"

nupad 'enter' = "768910mnb243"

numpad '5' = "768910mnb243" (the pin problem makes sense now)

'windows' = "7 ZS6"

'Fn' = "/*+-xda\`"

left Brackets (square brackets)'[' = ";'=.vgt]-/
["

These keys also dont work in bios(works sometimes if i keep pressing the key)

14. tried reinstalling steelseries. no change except now even the backlight does not work
15. i tried resetting ec again. this time i forgot to remove ac.
16. now all the above problems still exist and also the battery meter shows a white 'x' instead of a solid white fill.
17. now 5 of the 6 usb ports also stopped working

additional info
1. laptop is a little over a year old
2. I installed an ssd about 9 months ago
3. I performed a clean install of windows 3 months ago (for no particular reason)
4. BIOS and EC firmware are up to date

 

Are both BIOS & EC firmware up-to-date?
Have you tried using the factory recovery media and restore the PC? If problem persists, try the stock SSD/HDD instead.

 

Yes, both are up to date
I have not tried the factory recovery media, I will try when I get back home(I wont have access to it till this Sunday)
the keys don't work on the bios screen also, so I was not sure if its a windows problem

 

If the keys don't work, then try disconnecting the drives first to verify.
Also, try connecting those drives as slave units on another known-working system to verify if any of them is the cause to this issue.

 

The keys don't work even after disconnecting the drives.
The drives work fine in another system, no weird behavior.

edit: 5 of the 6 usb ports also stopped working now

 

What's your current version of BIOS & EC? Did you flash them recently?

 

BIOS Version: E1781IMS.317
BIOS Release Date: 2016/01/18
EC Version: 1781EMS1 Ver5.12, 05/06/2015
(from msi help desk)
No, the bios was flashed in march, the EC is the same from when I got the laptop

 

Those are up-to-date already so it is possible that you have hardware failure.
Since it's still under warranty, contact MSI directly to request for a RMA#.

 

Update: when I switched on the laptop yesterday the USB ports and keyboard backlight started working but the touchpad stopped again
When I switched it on today the battery and keyboard also started working, so currently the touchpad is the only thing that is not working
Edit: 1 more restart later touchpad is working, now everything is working fine like nothing was ever wrong

 

That's pretty strange, so everything's fine all of a sudden?
Your hardware felt a bit of rebellious?

 

Yeah, it's like it's possessed.
Everything is fine now, even the fan ramping to 100% stopped.
Could dust or moisture cause this?
It was quite dusty when I opened it up, and the problems started when I was visiting my sister who lives in quite a humid place

 

Yes, dust buildup in the heatsink/vent can cause that. Clean it up thoroughly, and see how it behaves afterwards.