Non-working laptop cooler?

Question

laptops

In general, the problem is this, I completely replaced the thermal paste and thermal pads on the Dell g5 15 5587 laptop, after which I turned it on and everything worked as usual, as if the laptop had not been disassembled, there was no CO check, which happened before every time. It was useful to understand and found a non-working cooler from the CPU side, disassembled it again and checked the connections, everything is in place, the pins are located normally, no breaks or distortions, the wiring also without visible signs of damage, checked everything under a magnifying glass. The disassembly and assembly of the laptop took place very carefully and accurately, it was not the first time to clean it. But before that there was a problem, I couldn’t unscrew the bolt on the radiator, and therefore the laptop, which had stood for more than a year without new thermal paste and thermal pads, was used as it is, albeit for a little time, but the temperature during the process was under a hundred. I know that it's impossible but there was no way to change everything, and the battle with that bolt even more so took a lot of money and time. Now the video card heats up to 77 degrees, and the percentage with turbo boost and split cores is up to 90, which of course is not too much, but still noticeable, so I removed the increase in frequency and split from sin. The measurements were taken in a hard game. If you just dig on the Internet, then temperatures above 55 do not jump.
Based on the whole story, I will ask a few leading questions:
1) Can the CO check at the first start not work because one cooler is not working?
2) Is it possible that during a high temperature, before changing the thermal paste and thermal pads, the cooler controller could not stand it and broke? And if so, where is it located, on the board itself or on the cooler?
3) Are there devices for checking coolers? Would it be cheaper or better to take it to the service to check?
4) What could be the reasons and advice?

Answer 1

1) yes
2) hardly. this is usually a multicontroller chip that is responsible for power supply, keyboard, backlight LEDs. from the absence of a cooler, it will not break. but from static or supplying the wrong voltage - perhaps
3) USB cable + needles. poke +/- and see if it spins. some need 12v, but a power supply can also be found. in general, I would measure the voltage at the terminals with a multimeter, whether power is supplied to it. and if there is 5v, but it does not spin, then it is dead
4) why did you decide that it does not work? 50 and 90 are adequate temperatures for your laptop's modes

Answer 2

Well, it seems like the cooler is handed over there only if it gets very hot, you can try downloading occt and giving a load to the processor, see if it turns on under load.

Answer 3

1. If you are a happy owner of a DELL laptop, you can see the "Operation / malfunction" of the cooler in the BIOS, there is a Device Event Log. "Fault" - will look like a record "Fan malfunction" with the date of the event.
2. If you haven't done it yet, turn off "C-State" in the BIOS - because of it, "misunderstandings" often occur with CO on DELL
PS laptops, the owner of the G7 7790 laptop himself, CO is simply disgusting. Without undervolting, I didn’t get out of throttling in games.