HP Elitebook 8760w: Random Crashes when Charging

[sonictm]

Hello,

My friend and I both own HP Elitebook 8760w's (with the same specs).
CPU: i7-2620m
GPU: Quadro 3000m
RAM: 4GB
His OS: Windows 7 Professional x64

Problem: When his laptop is plugged up, the laptop randomly forces itself off- making the same sound as if you unplugged a laptop without the battery. It appears erratically, however it appears to happen more often when using any intensive applications. I don't believe that he has consistently had it plugged up to a surge protector, so I fear that some components may have been damaged. Upon checking windows event viewer, he gets a corresponding kernal power error 41.

Steps we've tried:
1. Replaced his battery with my battery (Same voltage and amps)- I know my battery is good.
2. Replaced his charger with my charger(Same voltage)- I know my charger is good.
3. Uninstalled recent programs in case of software issues
4. Ran several Virus scans- 0 reported malware (MalwareBytes)
5. Ran Memtest86+ (no errors or crashes)
6. Tried plugging into a different outlet (Repeating steps 1-2)
7. Checked gpu and cpu temperature for overheating (both were fine)
8. Limiting cpu usage to the same percentage as on battery power settings.

Any help you can give is greatly appreciated.
Thank you for your time.

 

[ex_bubblehead]

I own 2 of that same model as well and had to replace a motherboard for that exact issue. The power circuitry is on the motherboard and cannot be repaired/replaced separately. Might want to price out a new laptop with similar specs before going the repair route as a motherboard replacement can equal or exceed the price of a new laptop, and, you don't get a warranty with a motherboard. In my case it was warranty work. However, the warranties on that model have long expired.

 

[sonictm]

I own 2 of that same model as well and had to replace a motherboard for that exact issue. The power circuitry is on the motherboard and cannot be repaired/replaced separately. Might want to price out a new laptop with similar specs before going the repair route as a motherboard replacement can equal or exceed the price of a new laptop, and, you don't get a warranty with a motherboard. In my case it was warranty work. However, the warranties on that model have long expired.

I thought that the mobo going out could be the case. Still pretty unfortunate. Thank you for your help.