Hello,

a few days ago I had my WD19TBS replaced for reboots issue and power supply warning

https://www.dell.com/community/Precision-Mobile-Workstations/Precision-5550-and-WD19TBS-reboots-and-power-supply-warning/m-p/8387523

 

I still have some issue with the laptop. It gets very hot in normal usage, battery can't hold charge, I can still hear crackling noise from the docking station and it powers off randomly.

Below you can see the core temperatures while I'm writing this.

 

At reboot I had this warning too

 

Note that a year ago I had my motherboard swapped