Passmark Burnintest max CPU temperature failure with HP elitebook 840 G9

[zamine]

​Hi

i purchased 2 days ago a used HP elitebook 840 G9 with i5 1245u inside and 16 gb ddr5, it comes with a suposed OEM 65w type C charger.
before the payement at the store , i lunched the quick test 3 overall that passed without any problem.

to fully test the laptop at home, i run Passmark Burnintest with the charger plugged in, i lunched the Max CPU temperature (15 min test), it immediately displayed temperature failure (100° threshold exceeded), same with CPU coverage test (also 15 min test) but both achieved the 15 minutes duration.

during those tests, the Type C charger was very hot to the point that it was nearly impossible to keep it in hands…!

i tried the 24H with charger plugged in and it was terminated after 1h39 only, with the same temperature failure and 100° thresold exceeded problem.

i tried the Max CPU temperature without the charger (only on battery and the temperature was around 65° all the time and it hit 70° only in the first seconds) and there 0 errors after the 15 minutes duration of the test.

this is a cap  of the 24H test failed with the charger plugged in.

Now , i don't know if this Threshold exceeded problem and that CPU is hitting 100° at some times is due to the bad charger, a problem of my HP elitebook fan's system or the processor itself or it's the elitebook 840 G9 and it's 1245u are limited ? i know it's a U model but and the fan system isn't optimized for long sessions of heavy work but can't a such machine (old or completely new ) run a 24h test without temperature and threshold exceeded problems?

thanks