Pavilion X360 14-dh0042tx Shutdown randomly without any warning JUST ONE month after Wrrnty 2Yr only

[Fakesheep]

STRONGLY SUGGEST EVERYONE NOT TO BUT HP PRODUCT ANYMORE, THE SUPPORT SERVICE IS EXTREMELY SLOW, THE SIMILAR ISSUE IS OBSERVED ON ALL THE MODEL, KEYWORD SEARCH FOR MOTHERBOARD FAILURE, SUDDEN SHUTDOWN, ALL THE ISSUE OBSERVED AS EARLY AS SINCE 2016, HP NEVER IMPROVE ANYTHING WITH THAT LUXURY PRODUCT PRICE WITH POOR QUALITY.

Product name: HP Pavilion X360 Convertible 14-dh0xxx (14-dh0042tx)

First seen issue: Just BLOODY ONE MONTH after the expiry date!

Product number: 6TZ43PA#UUF

Processor: Intel(R) Core(TM) i7-8565U

Graphic: Nvidia Geforce MX250

Installed RAM: 20.0 GB (19.8 GB usable)

System type: 64-bit

Case number:

5079404892

Problem:

Laptop can on normally but shutdown randomly at anytime without any sign (No blue screen, no FPS drop, no over-temp, no lagging, HP diagnostic tests all passed, Fan working fine)

Symptoms:

1. Laptop can work and turn on normally
2. Laptop shutdown randomly at ANYTIME
3. Sudden shutdown without any error or blue screen
4. Sudden shutdown anytime including
1. Battery only (any%, 50%, 60%, 70%, 80%, 90%, 100% all possible)
2. Plugged in the powered Charger
3. Plugged in the non-powered Charger
4. Computer IDLE in lock screen (No heavy load)
5. Laptop working normally: Internet browsing, Youtube, Gaming, Watch videos etc

SOFT methods applied but not working:

1. Windows upgraded to Wins 11. NOT SOLVED
2. Windows rolled back to Wins 10. NOT SOLVED
3. BIOS updated from F.07 (sp98629) to the latest F.18 (sp132821). NOT SOLVED

BIOS F.18 link: https://ftp.hp.com/pub/softpaq/sp132501-133000/sp132821.exe (From HP-On Site Support PIC named: Puneet)

1. HP Hardware Diagnostic Tool (UEFI), result showed all passed. NOT SOLVED
2. Windows Power Plan setting. NOT SOLVED
1. Screen on battery power / plugged in : NEVER
2. Sleep on battery power / plugged in : NEVER
3. Hard disk turn off : NEVER
3. Power option: PCI Express. NOT SOLVED
1. Link state power management : OFF
4. Battery calibration: NOT SOLVED
1. Fully charged battery 100%
2. Unplugged, discharged until PC turn off
3. Repeat a) and b) for 2 cycles
5. HWiNFO apps to monitor the system. NOT SOLVED
1. Windows Hardware Errors (WHEA)
2. PCI/PCIe bus errors: Up to 30 counts (HP staff told me it is not an issue)
3. 
6. Device manager monitoring. NOT SOLVED
1. 
2. 
3. Unknown Base System Device (HP staff told me it is not any issue)
4. I have disabled this device just to make sure, but it didn’t solve the problem still
7. CMD command POWERCFG -H OFF. NOT SOLVED
8. CMD command DISM /ONLINE /CLEANUP-IMAGE /RESTOREHEALTH. NOT SOLVED
9. CMD command SFC /SCANNOW. NOT SOLVED

HARD methods applied but not working:

1. Cleaning fan, completely free of dust. NOT SOLVED
2. Cleaning DC Jack port. NOT SOLVED
3. Replaced with NEW battery HT03XL. NOT SOLVED
1. L11421-421, 11.55V, 3470mAh. 
4. Replaced with NEW NVMe M.2 SSD 256GB. NOT SOLVED
1. Silicon Power NVMe PCIe Gen3x4 M.2 2280 SSD A60 P34 (256GB)
5. Replaced with NEW thermal compound on CPU and GPU. NOT SOLVED
6. Added 3rd-party heatsink to SSD. NOT SOLVED
7. Added 3rd-party heatsink to DC-DC Power circuit (0.7V Buck). NOT SOLVED
8. Total disassembled for dust cleaning. NOT SOLVED
1. Removed and cleaned the SSD slot. Done
2. Removed and cleaned the RAM slots. Done
3. Removed and cleaned the Fan. Done
4. Removed the Keyboard, fingerprint, USBs Flexi-Flat-Cable. Done
5. Removed the heat pipes and cleaning. Done
6. Removed the battery pack. Done
7. Remove the motherboard, flip over and clean. Done
8. Removed the Screen FFC and cleaned the slot. Done
9. Removed and cleaned the touchpad slot. Done
9. Monitor the battery pack voltage from motherboard. NOT SOLVED
1. By digital multimeter (JIS/JEDEC standard)
2. When battery reached 81% stated, pack voltage = 13.04V
3. When battery reached 100% stated, pack voltage = 13.04V
4. The actual pack voltage is stable at 13.04V is it normal? (My laptop is a 3-cells battery pack with nominal voltage 11.55V)
5. For li-ion battery pack voltage, should be not more than 4.2500V MAX
6. But the actual pack voltage I get is 4.34667V per cell, is it accepted?
10. Removed one of the DDR4 RAM and tested it. NOT SOLVED 
1. Removed RAM #1, only RAM #2 working. Tested and not solved
2. Removed RAM #2, only RAM #1 working. Tested and not solved
11. Shaking the laptop while powered ON. NOT SOLVED
1. No any knocking sound (Meaning no loose part)
2. Gently tapping on the laptop, laptop no shutdown (Meaning no mechanical failure)

Electronic component level check

1. Alcohol cleaning: NOT SOLVED
1. Cleaned RAM#1 and RAM #2 Slots
2. Cleaned USB FFC Slots
3. Cleaned LCD screen FFC Slot
4. Cleaned Touchpad FFC Slot
5. Cleaned fingerprint FFC Slot
6. Cleaned DC Jack Slot
2. DC Jack charger input circuit check. NOT SOLVED
1. Charge input Zener diode → OK, not short
2. Input Power MOSFET → OK, no short
3. DC 0.7V power circuit → checked, looks good
4. DC 1.2V power circuit → checked, looks good
5. DC 5.0V power circuit → checked, looks good
6. MLCC capacitor check, random check → Looks good
7. SP capacitor check → Looks good
8. Fuses check → No blown, OK
3. GPU RAM visual check. UNKNOWN
1. A slight of discoloration observed
2. Not sure how to check GPU if is healthy or not

Suspicious (NEED HP TO ADVICE)

1. Undetectable hardware failures:
1. Aged diodes?
2. Aged MOSFETs?
3. Aged capacitor?
4. Aged inductors?
5. Internal built-in protection false tripping?
6. Thermal sensor false tripping?
7. Zener diodes false tripping?
2. Undetectable software failures:
1. Are PCI/PCIe drivers incompatible?
2. BIOS preset?
3. Battery calibration?
4. M.2 SSD preset?

HP please advise the solution!