Question Weird CPU temperatures on Acer Nitro ANV15-41

[RubyTheFlareon]

A month ago I've purchased a brand-new Acer Nitro ANV15-41 with Ryzen 7 7735HS. I was very happy with the purchase and it was a smooth ride, until I had to turn it into the service shop for a screen matrix replacement. After said matrix was replaced and I booted my laptop at home and used it for about 5 minutes in a non-resource intensive program (like Word), I heard the coolers spin up wild before it slowed back down about 5 seconds later. After a few of such "bursts" I decided to check the temps in UEFI. 5 seconds after booting, after being in a cold room the temperature shown in UEFI (it said "System temperature", but I assume it is CPU temp.) rapidly rose and capped at 90 celcius. I downloaded OCCT to monitor the temps more closely. After loading ANY program (like browser, Discord, Word or any other app really) the temperature immediately spiked to 87 degrees and died off just as quick back to normal 40-45. Now, a day after that with just my browser with two tabs on the temp in OCCT is persistent at 70-73 degrees. During all these measurements and work with the laptop the CPU load as per the Task Manager never exceeded 25%, neither there were any pressure on RAM (around 40% usage) and GPU (0-20% usage). This really only occurs when the laptop is powered from the network (when working off the battery the temp spikes are insignificant, from 45 to around 55 degrees), although the UEFI says that it's 90 degrees when working both from network and the battery. In my paranoia I checked the laptop innards and everything was sealed, so I don't think that they could have put another faulty CPU in there instead of my new one. Could they have somehow disrupted the power supply when replacing the screen matrix?

 

[Roland Of Gilead]

A month ago I've purchased a brand-new Acer Nitro ANV15-41 with Ryzen 7 7735HS. I was very happy with the purchase and it was a smooth ride, until I had to turn it into the service shop for a screen matrix replacement. After said matrix was replaced and I booted my laptop at home and used it for about 5 minutes in a non-resource intensive program (like Word), I heard the coolers spin up wild before it slowed back down about 5 seconds later. After a few of such "bursts" I decided to check the temps in UEFI. 5 seconds after booting, after being in a cold room the temperature shown in UEFI (it said "System temperature", but I assume it is CPU temp.) rapidly rose and capped at 90 celcius. I downloaded OCCT to monitor the temps more closely. After loading ANY program (like browser, Discord, Word or any other app really) the temperature immediately spiked to 87 degrees and died off just as quick back to normal 40-45. Now, a day after that with just my browser with two tabs on the temp in OCCT is persistent at 70-73 degrees. During all these measurements and work with the laptop the CPU load as per the Task Manager never exceeded 25%, neither there were any pressure on RAM (around 40% usage) and GPU (0-20% usage). This really only occurs when the laptop is powered from the network (when working off the battery the temp spikes are insignificant, from 45 to around 55 degrees), although the UEFI says that it's 90 degrees when working both from network and the battery. In my paranoia I checked the laptop innards and everything was sealed, so I don't think that they could have put another faulty CPU in there instead of my new one. Could they have somehow disrupted the power supply when replacing the screen matrix?

Hey there,

Hmmm. Something smells a little rotten in Denmark here.

If the temps were in check before you let the service team check it, then it's likely something they've done. Was this an Acer repair, or some shop you know that does repairs?

It could be they dislodged the CPU heatpipes or something like that. It wouldn't be possible to switch CPU's as nearly all new laptops have them soldered top the motherboard. I guess it's conceivable they changed that out, but highly unlikely.

It suggests to me, the cooling isn't seated properly, or the cooling pipes/heatsink have been removed and replaced, but without new thermal paste.

It's really hard to know for sure.