Ok, lets see if anyone knows just what the HELL is going on with this laptop a friend wants me to fix.
Background :
Friend bought this laptop new from bestbuy, and it came with a basic platter HDD.
The system has had a habit of blowing HDD's, and generally crashing.
The things I have fixed are so far, are fried thermal paste, updated bios, changed HDD 3 times (2 failed), repaired screen mounting brackets on LCD side. Lastly, I removed a MAGNET from the hard drive tray which was factory deliberately installed, glued in place in a plastic housing, and painted over to hide it (and NO I am not talking about the subwoofer magnet, which happens to be on the exact opposite of the hard drive mounting from THIS tiny magnet which is strong enough to hold a mechanics impact socket to a fridge securely And, is located next to a screw mounting for the hard drive bracket). And, lastly, the power cable from the side of the case that plugs into the motherboard (it became rather melted and charred, and is a "common" problem with this craptop. Which, if you ask me, is most certainly NOT common. When things overheat, melt, and turn black, I call that a problem, not a commonality).
The specific issue this laptop has which I have NOT been able to fix is the freeze-crashing, which turns the laptop off. My nearest guess is that its somehow tied to the idiotic GPU pipeline, because Lenovo piped the 860m chip directly THROUGH the 4600 graphics (if you attempt to shut off the intel crappics, the nvidia chip is also turned off. period.).
The laptop, running valid windows 10, fully updated, will randomly freeze, with no inputs working, but the cursor on the screen blinking a moment, then the laptop just shuts down. All within about 3 seconds, roughly.
**editted : 1) replaced power supply, new, 2) changed graphics number. i put 8600 and its 4600.**