Predator G9-791ce

I had problems with my Predator G9-791ce.  First the battery started to have problems.  It was right after the ill fated windows update, and I tested my batt only to find it's data interface dead as a dornail.  Reconnected the batt, plugged power, disabled the battery controller in the device manager.  Soon, fans were running slow.  After that, the Graphics card wouldn't run, device manager showed no info from it at all except an Error 43.  I looked up what I could, then ran my own tests.  The batt supplies a passthrough that the GPU and FANS require for the load they put on the power system.  Without the extra voltage loopthrough, the fans don't run fast enough to cool the system, and the GFX card doesn't receive enough voltage to start up.  The difference is about half a volt, but it's enough that the system gets errors from the GFX card and shuts it off, but the fans still don't have enough power to run up all the way, only medium performance.  With the replacement of the batt all is well.  I did clean the fans and I did clean of a little (very little) dust from the back of the frame of the laptop, but there wasn't much from anywhere else (I clean it out once every 6 months).  With the new battery, the system runs cool, fast, normal, and the graphics card is functional again.

Just remember when you remove the batt to press the reset after you unplug the original and after you plug in the new one.  This not only wipes the efi of the old battery but forces it to run a quick ping of the new one.  Then put it back together.

I'd start by disabling the graphics card, then the battery controller, then shutdown and replace the batt.  Once it's back together, plug in power, then turn it on, enable the battery controller, then the graphics card.  Restart.  Your system should be capable again.

If your fans still don't run, the thermal system may have been damaged, or the motors are dead.  You might try replacing the thermal system, but it's not as easy as it sounds.  You can find the procedures online, and if you have a tablet or smart tv to use, you can follow them around the motherboard, but if you only access through your computer, you'll have to find one in print and print it out--these are more difficult to find as people seem to think it easier to show than to tell, or they just don't know how to write it out very well (the current state of schooling is wonderful isn't it?).  I'll look it up a little later, but I can't promise anything.